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Guide Service 3DUW 1XPEHU ( $SULO )RU :DUUDQW\ LQIRUPDWLRQ UHIHU WR WKH EDFN RI WKH PDQXDO &RS\ULJKW $JLOHQW 7HFKQRORJLHV ,QF $OO 5LJKWV 5HVHUYHG $JLOHQW ( $ '& 3RZHU 6XSSO\ The Agilent Technologies E3631A is a high performance 80 watt-triple output DC power supply with GPIB and RS-232 interfaces. The combination of benchtop and system features in this power supply provides versatile solutions for your design and test requirements. Convenient bench-top features Triple output Easy-to-use knob control for voltage and current settings Highly visible vacuum-fluorescent display for voltage and current meters Tracking operation for 25V outputs Excellent load and line regulation and low ripple and noise Operating states storage Portable, ruggedized case with non-skid feet Flexible system features GPIB (IEEE-488) and RS-232 interfaces are standard SCPI (Standard Commands for Programmable Instruments) compatibility I/O setup easily done from front-panel Agilent E3631A Triple Output DC Power Supply The Front Panel at a Glance 1 2 3 4 5 6 Meter and adjust selection keys Tracking enable/disable key Display limit key Recall operating state key Store operating state/Local key Error/Calibrate key 7 I/O Configuration / Secure key 8 Output On/Off key 9 Control knob 10 Resolution selection keys 11 Voltage/current adjust selection key 2 1 Meter and adjust selection keys Select the output voltage and current of any one supply (+6V, +25V, or -25V output) to be monitored on the display and allow knob adjustment of that supply. 2 Tracking enable / disable key Enables / disables the track mode of 25V supplies. 3 Display limit key Shows the voltage and current limit values on the display and allows knob adjustment for setting limit values. 4 Recall operating state key Recalls a previously stored operating state from location "1", "2", or "3". 5 Store operating state / Local key 1 Stores an operating state in location "1", "2", or "3" / or returns the power supply to local mode from remote interface mode. 6 Error / Calibrate key 2 Displays error codes generated during operations, self-test and calibration / or enables calibration mode (the power supply must be unsecured before performing calibration). 7 I/O Configuration / Secure key 3 Configures the power supply for remote interfaces / or secure and unsecure the power supply for calibration. 8 Output On/Off key Enables or disables all three power supply outputs. This key toggles between two states. 9 Control knob Increases or decreases the value of the blinking digit by turning clockwise or counter clockwise. 10 Resolution selection keys Move the flashing digit to the right or left. 11 Voltage/current adjust selection key Selects the knob function to voltage control or current control. 1The key can be used as the "Local" key when the power supply is in the remote interface mode. 2 You can enable the "calibration mode" by holding down this key when you turn on the power supply. 3You can use it as the "Secure" or "Unsecure" key when the power supply is in the calibration mode. 3 Front-Panel Voltage and Current Settings You can set the voltage and current from the front panel using the following method. Use the voltage/current adjust selection key, the resolution selection keys, and the control knob to change the limiting or limitings value of voltage or current. 1 Press the Display Limit key after turning on the power supply. 2 Set the knob to the voltage control mode or current control mode using the voltage/ current adjust selection key. 3 Move the blinking digit to the appropriate position using the resolution selection keys. 4 Change the blinking digit to the desired value using the control knob. 5 Press the Output On/Off key to enable the output. After about 5 seconds, the display will go to the output monitor mode automatically to display the voltage and current at the output. Note All front panel keys and controls can be disabled with remote interface commands. The Agilent E3631A must be in "Local" mode for the front panel keys and controls to function. 4 Display Annunciators Adrs Rmt +6V +25V -25V CAL Track Limit ERROR OFF Unreg CV CC Power supply is addressed to listen or talk over a remote interface. Power supply is in remote interface mode. Displays the output voltage and current for +6V supply. Knob is active for +6V supply. Displays the output voltage and current for +25V supply. Knob is active for +25V supply. Displays the output voltage and current for -25V supply. Knob is active for -25V supply. power supply is in calibration mode. The outputs of +25V and -25V supplies are in track mode. The display shows the voltage and current limit value of a selected supply. Hardware or remote interface command errors are detected and also the error bit has not been. The three ouputs of the power supply are disabled. The displayed output is unregulated (output is neither CV nor CC). The displayed output is in constant-voltage mode. The displayed output is in constant-current mode. To review the display annunciators, hold down turn on the power supply. Display Limit key as you 5 The Rear Panel at a Glance 1 Power-line voltage setting 2 Power-line fuse-holder assembly 3 AC inlet 4 Power-line module 5 GPIB (IEEE-488) interface connector 6 RS-232 interface connector Use the front-panel I/O Config key to: Select the GPIB or RS-232 interface (see chapter 3). Set the GPIB bus address (see chapter 3). Set the RS-232 baud rate and parity (see chapter 3). 6 In This Book Specifications Chapter 1 lists the power supply s specifications and describes how to interpret these specifications. Quick Start Chapter 2 prepares the power supply for use and helps you get familiar with the front-panel features. Calibration Procedures Chapter 3 provides performance verification and calibration procedures. Theory of Operation Chapter 4 describes block and circuit level theory related to the operation of the power supply. Service Chapter 5 provides guidelines for returning your power supply to Agilent Technologies for servicing, or for servicing it yourself. Replaceable Parts Chapter 6 contains a detailed parts list of the power supply. Backdating Chapter 7 describes the difference between this manual and older issues of this manual. Schematics Chapter 8 contains the power supply's schematics, disassembly drawings, and component locator drawings. If you have questions relating to the operation of the power supply, call 1-800-452-4844 in the United States, or contact your nearest Agilent Technologies Sales Office. 7 8 Contents Chapter 1 Specifications Performance Specifications - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 15 Supplemental Characteristics - - - - - - - - - - - - - - - - - - - - - - - - - - - 17 Chapter 2 Quick Start To prepare the power supply for use - - - - - - - - - - - - - - - - - - - - - To check the rated voltages of the power supply - - - - - - - - - - - To check the rated currents of the power supply - - - - - - - - - - - To use the power supply in constant voltage mode - - - - - - - - - To use the power supply in constant current mode - - - - - - - - - To use the power supply in track mode- - - - - - - - - - - - - - - - - - - To store and recall the instrument state - - - - - - - - - - - - - - - - - - To rack mount the power supply - - - - - - - - - - - - - - - - - - - - - - - - Chapter 3 Calibration Procedures Agilent Technologies Calibration Services - - - - - - - - - - - - - - - - Calibration Interval- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Automating Calibration Procedures - - - - - - - - - - - - - - - - - - - - - Recommended Test Equipment - - - - - - - - - - - - - - - - - - - - - - - - - Test Considerations - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Performance Verification Tests - - - - - - - - - - - - - - - - - - - - - - - - - Self-Test - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Performance Verification Tests- - - - - - - - - - - - - - - - - - - - - - - - Measurement Techniques- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Setup for Most Tests - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Electronic Load - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Current-Monitoring Resistor - - - - - - - - - - - - - - - - - - - - - - - - - - Programming - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Voltage and Current Values - - - - - - - - - - - - - - - - - - - - - - - - - - - Constant Voltage (CV) Verifications - - - - - - - - - - - - - - - - - - - - - Constant Voltage Test Setup - - - - - - - - - - - - - - - - - - - - - - - - - - Voltage Programming and Readback Accuracy - - - - - - - - - - - CV Load Regulation - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - CV Line Regulation- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Normal Mode Voltage Noise (CV Ripple and Noise) - - - - - - - Common Mode Current Noise- - - - - - - - - - - - - - - - - - - - - - - - - Load Transient Response Time - - - - - - - - - - - - - - - - - - - - - - - - 41 41 42 42 43 44 44 44 45 45 46 46 46 46 47 47 47 49 50 51 52 53 23 25 27 29 31 33 34 36 Contents 9 Contents Chapter 3 Calibration Procedures (continued) Constant Current (CC) Verifications - - - - - - - - - - - - - - - - - - - - - - 54 Constant Current Test Setup - - - - - - - - - - - - - - - - - - - - - - - - - - - 54 Current Programming and Readback Accuracy - - - - - - - - - - - - 54 CC Load Regulation - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 56 CC Line Regulation - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 57 Normal Mode Current Noise (CC Ripple and Noise) - - - - - - - - 58 Performance Test Record for Agilent E3631A - - - - - - - - - - - - - - - 59 CV Performance Test Record- - - - - - - - - - - - - - - - - - - - - - - - - - - 59 CC Performance Test Record- - - - - - - - - - - - - - - - - - - - - - - - - - - 60 Calibration Security Code - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 61 To Unsecure the Power Supply for Calibration - - - - - - - - - - - - 62 To Unsecure the Power Supply Without the Security Code - - - 64 Calibration Count - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 65 Calibration Message - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 65 General Calibration/Adjustment Procedure- - - - - - - - - - - - - - - - - 66 Aborting a Calibration in Progress - - - - - - - - - - - - - - - - - - - - - - - - 71 Calibration Record for Agilent E3631A - - - - - - - - - - - - - - - - - - - - 72 Error Messages - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 73 Calibration Program - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 75 Chapter 4 Theory of Operation Block Diagram Overview - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 81 AC Input and Bias Supplies- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 83 Floating Logic - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 84 D-to-A Converter - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 86 A-to-D Converter - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 87 Power Mesh and Control- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 88 Earth-Referenced Logic - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 90 Front Panel - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 90 Chapter 5 Service Operating Checklist- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 93 Is the Power Supply Inoperative? - - - - - - - - - - - - - - - - - - - - - - - 93 Does the Power Supply Fail Self-Test? - - - - - - - - - - - - - - - - - - - 93 Types of Service Available - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 94 Standard Repair Service (worldwide) - - - - - - - - - - - - - - - - - - - - 94 Express Exchange (U.S.A. only) - - - - - - - - - - - - - - - - - - - - - - - - 94 10 Contents Chapter 5 Service (continued) Repacking for Shipment - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Electrostatic Discharge (ESD) Precautions - - - - - - - - - - - - - - - Surface Mount Repair - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - To Replace the Power-Line Fuse - - - - - - - - - - - - - - - - - - - - - - - - Troubleshooting Hints - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Unit is Inoperative - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Unit Reports Errors 740 to 748 - - - - - - - - - - - - - - - - - - - - - - - - Unit Fails Self-Test- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Bias Supplies Problems - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Self-Test Procedures- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Power-On Self-Test - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Complete Self-Test - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Chapter 6 Replaceable Parts 95 96 96 96 97 97 97 97 98 99 99 99 Contents Replaceable Parts - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - To Order Replaceable Parts- - - - - - - - - - - - - - - - - - - - - - - - - - Backdating and Parts Changes - - - - - - - - - - - - - - - - - - - - - - - E3631-60002 Top PCB Assembly - - - - - - - - - - - - - - - - - - - - - - E3631-60003 VFD Assembly- - - - - - - - - - - - - - - - - - - - - - - - - - E3631-60002 Bottom PCB Assembly - - - - - - - - - - - - - - - - - - - E3631-60002 Front Frame Assembly - - - - - - - - - - - - - - - - - - - E3631A Power Supply Assembly- - - - - - - - - - - - - - - - - - - - - - Manufacturer s List - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 104 104 104 105 111 112 116 116 117 Chapter 7 Backdating - - - - - - - - - - - - - - - - - - - - - - - - - 119 Chapter 8 Schematics Mechanical Disassembly - - - - - - - - - - - - - - - - - - - - - - - - - - - - - E3631-60002 Component Locator - - - - - - - - - - - - - - - - - - - - - - E3631-60003 Component Locator - - - - - - - - - - - - - - - - - - - - - - E3631-60004 Component Locator - - - - - - - - - - - - - - - - - - - - - - AC Input and Bias Supplies Schematic - - - - - - - - - - - - - - - - - - Floating Logic Schematic - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ADC and DAC Schematic - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 25V Power Circuit Schematic- - - - - - - - - - - - - - - - - - - - - - - - - - +6V Power Circuit and Isolation Schematic - - - - - - - - - - - - - - Earth-Referenced Logic Schematic - - - - - - - - - - - - - - - - - - - - - Display and Keyboard Schematic - - - - - - - - - - - - - - - - - - - - - - 123 124 125 126 127 128 129 130 131 132 133 11 Contents 12 1 1 Specifications Specifications The performance specifications are listed in the following pages. Specifications are warranted in the temperature range of 0 to 40 C with a resistive load. Supplemental characteristics, which are not warranted but are descriptions of performance determined either by design or testing. Chapter 3 "Calibration Procedures" contains procedures for verifying the performance specifications. All specifications apply to the three outputs unless otherwise specified. 14 Chapter 1 Specifications Performance Specifications 1 Performance Specifications Output Ratings (@ 0 C - 40 C) +6V Output 0 to +6 V ; 0 to 5 A +25V Output 0 to +25 V ; 0 to 1 A -25V Output 0 to -25 V ; 0 to 1 A Programming Accuracy [1] 12 months (@ 25 C 5 C), (% of output + offset) +6V Output +25V Output -25V Output Voltage 0.1% + 5 mV 0.05% + 20 mV 0.05% + 20 mV Current 0.2% + 10 mA 0.15% + 4 mA 0.15% + 4 mA Readback Accuracy [1] 12 months (over GPIB and RS-232 or front panel with respect to actual output @ 25 C 5 C), (% of output + offset) +6V Output +25V Output -25V Output Voltage 0.1% + 5 mV 0.05% + 10 mV 0.05% + 10 mV Current 0.2% + 10 mA 0.15% + 4 mA 0.15% + 4 mA Ripple and Noise (with outputs ungrounded, or with either output terminal grounded, 20 Hz to 20 MHz) +25V Output -25V Output +6V Output Voltage <0.35 mV rms <0.35 mV rms <0.35 mV rms <2 mV p-p <2 mV p-p <2 mV p-p Current <2 mA rms <500 mA rms <500 mA rms Common mode current <1.5 mA rms Load Regulation, (% of output + offset) Change in output voltage or current for any load change within ratings Voltage <0.01% + 2 mV Current <0.01% + 250 mA Line Regulation, (% of output + offset) Change in output voltage and current for any line change within ratings Voltage <0.01% + 2 mV Current <0.01% + 250 mA [1] Accuracy specifications are after an 1-hour warm-up and calibration at 25 C 15 Chapter 1 Specifications Performance Specifications Programming Resolution +6V Output Voltage 0.5 mV Current 0.5 mA Readback Resolution +6V Output Voltage 0.5 mV Current 0.5 mA Meter Resolution +6V Output Voltage 1 mV Current 1 mA +25V Output 1.5 mV 0.1 mA -25V Output 1.5 mV 0.1 mA +25V Output 1.5 mV 0.1 mA -25V Output 1.5 mV 0.1 mA +25V Output 10 mV 1 mA -25V Output 10 mV 1 mA Transient Response Time Less than 50 msec for output recover to within 15 mV following a change in output current from full load to half load or vice versa Command Processing Time Programming Commands : Maximum time for output to change after receipt of APPLy and SOURce commands : <50 msec Readback Command : Maximum time to readback output by MEASure? command : <100 msec The Other Commands : < 50 msec Tracking Accuracy The 25V outputs track each other within (0.2% of output + 20 mV). 16 Chapter 1 Specifications Supplemental Characteristics 1 Supplemental Characteristics Output Programming Range (maximum programmable values) +25V Output -25V Output +6V Output Voltage 0 to 6.18 V 0 to 25.75 V 0 to -25.75 V Current 0 to 5.15 A 0 to 1.03 A 0 to 1.03 A Temperature Coefficient, (% of output + offset) Maximum change in output/readback per C after a 30-minute warm-up +25V Output -25V Output +6V Output Voltage 0.01% + 2 mV 0.01% + 3 mV 0.01% + 3 mV Current 0.02% + 3 mA 0.02% + 0.5 mA 0.02% + 0.5 mA Stability, (% of output + offset) Following a 30-minute warm-up, change in output over 8 hours under constant load, line, and ambient temperature +6V Output +25V Output -25V Output Voltage 0.03% + 1 mV 0.02% + 2 mV 0.02% + 2 mV Current 0.1% + 3 mA 0.05% + 1 mA 0.05% + 1 mA Voltage Programming Speed Maximum time required for output voltage to settle within 1% of its total excursion (for resistive load). Excludes command processing time. +6V Output +25V Output -25V Output Full load Up 11 msec 50 msec 50 msec Full load Down 13 msec 45 msec 45 msec No load Up 10 msec 20 msec 20 msec No load Down 200 msec 400 msec 400 msec Isolation The 0-6V supply is isolated from the 25V supply up to 240 Vdc. Maximum isolation voltage from any terminal to chassis ground 240 Vdc. AC Input Ratings (selectable via rear panel selector) std 115 Vac 10%, 47 to 63 Hz opt 0E3 230 Vac 10%, 47 to 63 Hz opt 0E9 100 Vac 10%, 47 to 63 Hz Maximum Input Power 350 VA with full load 17 Chapter 1 Specifications Supplemental Characteristics Cooling Fan cooled Operating Temperature 0 to 40 C for full rated output. At higher temperatures, the output current is derated linearly to 50% at 55 C maximum temperature. Output Voltage Overshoot During turn-on or turn-off of ac power, output plus overshoot will not exceed 1 V if the output control is set to less than 1 V. If the output control is set to 1 V or higher, there is no overshoot. Programming Language SCPI (Standard Commands for Programmable Instruments) State Storage Memory Three (3) user-configurable stored states Recommended Calibration Interval 1 year Dimensions* 212.6 mmW x 132.6 mmH x 348.2 mmD (8.4 x 5.2 x 13.7 in) *See the next page for detailed information. Weight Net Shipping 8.2 kg (18 lb) 11 kg (24 lb) 18 Chapter 1 Specifications Supplemental Characteristics 1 Figure 1-1. Dimensions of Agilent E3631A Power Supply 19 Chapter 1 Specifications Supplemental Characteristics 20 2 2 Quick Start Quick Start One of the first things you will want to do with your power supply is to become acquainted with its front panel. Written procedures in this chapter prepare the power supply for use and familiarize you with most front-panel operations. The power supply is shipped from the factory configured in the front-panel operation mode. At power-on, the power supply is automatically set to operate in the front-panel operation mode. When in this mode, the frontpanel keys can be used. When the power supply is in remote operation mode, you can return to front-panel operation mode at any time by pressing the Local key if you did not previously send the front-panel lockout command. A change between front-panel and remote operation modes will not result in a change in the output parameters. When you press the Display Limit key (the Lmt annunciator blinks), the display of the power supply goes to the limit mode and the present limit values of the selected supply will be displayed. In this mode, you can also observe the change of the limit values when adjusting the knob. If you press the Display Limit key again or let the display time-out after several seconds, the power supply will return the display to the meter mode (the Lmt annunciator turns off). In this mode, the actual output voltage and current will be displayed. All outputs of the power supply can be enabled or disabled from the front panel using the Output On/Off key. When the output of the power supply is off, the OFF annunciator turns on and the three outputs are disabled. The display provides the present operating status of the power supply with annunciators and also informs the user of error codes. For example, the +6V supply is operating in CV mode and controlled from the front panel, then the CV and +6V annunciators will turn on. If, however, the power supply is remotely controlled, the Rmt annunciator will also turn on, and when the power supply is being addressed over GPIB interface, the Adrs annunciator will turn on. see "Display Annunciators" on page 5 for more information. Throughout this chapter the key to be pressed is shown in the left margin. 22 Chapter 2 Quick Start To prepare the power supply for use To prepare the power supply for use The following steps help you verify that the power supply is ready for use. 1 Check the list of supplied items. Verify that you have received the following items with your power supply. If anything is missing, contact your nearest Agilent Technologies Sales Office. One appropriate power cord for your location. One User's Guide. This Service Guide. Certificate of Calibration. 2 Verify that the correct power-line voltage setting is selected and that the correct power-line fuse is installed. The line voltage is set to 100, 115 or 230 Vac from the factory according to the input power option selected when you ordered the power supply. Change the voltage setting if it is not correct for your location (see the next page for detailed information). For 100 or 115 Vac operation, the correct fuse is 2.5 AT (Agilent part number 2110-0913) and for 230 Vac operation, the correct fuse is 2 AT (Agilent part number 2110-0587). Power 2 3 Connect the power cord and turn on the power supply. A power-on self-test occurs automatically when you turn on the power supply. The front-panel display will light up while the power supply performs its power-on self- test. After performing the self-test, the power supply will go into the power-on / reset state; all outputs are disabled (the OFF annunciator turns on); the display is selected for the +6V supply (the +6V annunciator turns on); the knob is selected for voltage control. Output On/Off 4 Enable the outputs Press the Output On/Off key to enable the outputs. The OFF annunciator turns off and the +6V and CV annunciators are lit. The blinking digit can be adjusted by turning the knob. Notice that the display is in the meter mode. "Meter mode" means that the display shows the actual output voltage and current. 23 Chapter 2 Quick Start To prepare the power supply for use 1 Remove the power cord. Remove the fuse-holder assembly with a flat-blade screwdriver from the rear panel. 2 Install the corect line fuse. Remove the power-line voltage selector from the power-line 100 or 115 Vac, 2.5 AT fuse 230 Vac, 2 AT fuse 3 Rotate the power-line voltage selector until the correct voltage appears. 4 Replace the power-line voltage selector and the fuse-holder assembly in the rear panel. 100, 115 or 230 Vac Install the correct fuse and verify that the correct line voltage appears in the window. 24 Chapter 2 Quick Start To check the rated voltages of the power supply To check the rated voltages of the power supply The following procedures check to ensure that the power supply develops its rated voltage outputs with no load and properly responds to operation from the front panel. For each step, use the keys shown on the left margins. Power 2 1 Turn on the power supply. The power supply will go into the power-on / reset state; all outputs are disabled (the OFF annunciator turns on); the display is selected for the +6V supply (the +6V annunciator turns on); and the knob is selected for voltage control. 2 Enable the outputs. The OFF annunciator turns off and the +6V and CV annunciators are lit. The blinking digit can be adjusted by turning the knob. Notice that the display is in the meter mode. "Meter mode" means that the display shows the actual output voltage and current. 3 Check that the front-panel voltmeter properly responds to knob control for +6V supply. Turn the knob clockwise or counter clockwise to check that the voltmeter responds to knob control and the ammeter indicates nearly zero. 4 Ensure that the voltage can be adjusted from zero to the maximum 1 rated value. Adjust the knob until the voltmeter indicates 0 volts and then adjust the knob until the voltmeter indicates 6.0 volts. Output On/Off 1 You can use the resolution selection keys to move the blinking digit to the right or left when setting the voltage. 25 Chapter 2 Quick Start To check the rated voltages of the power supply +25V 5 Check the voltage function for the +25V supply. Select the meter and adjust selection key for the +25V supply. The CV annunciator is still lit and the +25V annunciator will turn on. Repeat steps (3) and (4) to check the voltage function for the +25V supply. -25V 6 Check the voltage function for the -25V supply. Select the meter and adjust selection key for the -25V supply. The CV annunciator is still lit and the -25V annunciator will turn on. Repeat steps (3) and (4) to check the voltage function for the -25V supply. 26 Chapter 2 Quick Start To check the rated currents of the power supply To check the rated currents of the power supply The following procedures check to ensure that the power supply develops its rated current outputs with a short and properly responds to operation from the front panel. For each step, use the keys shown on the left margin. Power 2 1 Turn on the power supply. The power supply will go into the power-on / reset state; all outputs are disabled (the OFF annunciator turns on); the display is selected for the +6V supply (the +6V annunciator turns on); and the knob is selected for voltage control. 2 Connect a short across (+) and (-) output terminals of +6V supply with an insulated test lead. Output On/Off 3 Enable the outputs. The OFF annunciator turns off and the +6V annunciator turns on. The CV or CC annunciator is lit depending on the resistance of the test lead. The blinking digit can be adjusted by turning the knob. Notice that the display is in the meter mode. "Meter mode" means that the display shows the actual output voltage and current. Display Limit 4 Adjust the voltage limit value to 1.0 volt. Set the display to the limit mode (the Lmt annunciator will be blinking). Adjust the voltage limit to 1.0 volt to assure CC operation. The CC annunciator will light. Vol/Cur 5 Check that the front-panel ammeter properly responds to knob control for the +6V supply. Set the knob to the current control, and turn the knob clockwise or counter clockwise when the display is in the meter mode (the Lmt annunciator is off). Check that the ammeter responds to knob control and the voltmeter indicates nearly zero (actually, the voltmeter will show the voltage drop caused by the test lead). 27 Chapter 2 Quick Start To check the rated currents of the power supply 6 Ensure that the current can be adjusted from zero to the maximum 1 rated value. Adjust the knob until the ammeter indicates 0 amps and then until the ammeter indicates 5.0 amps. +25V 7 Check the current function for the +25V supply. Disable the outputs by pressing the Output On/Off key and connect a short across (+) and (COM) output terminals of the 25V supply with an insulated test lead. Repeat steps (3) through (6) after selecting the meter and adjust selection key for the +25V supply. -25V 8 Check the current function for the -25V supply. Disable the outputs by pressing the Output On/Off key and connect a short across (-) and (COM) output terminals of the 25V supply with an insulated test lead. Repeat steps (3) through (6) after selecting the meter and adjust selection key for the -25V supply. Note If an error has been detected during the output checkout procedures, the ERROR annunciator will turn on. See "Error Messages" for more information, starting on page 113 in chapter 5 of the User's Guide. can use the resolution selection keys to move the blinking digit to the right or left when setting the current. 1You 28 Chapter 2 Quick Start To use the power supply in constant voltage mode To use the power supply in constant voltage mode To set up the power supply for constant voltage (CV) operation, proceed as follows. For each step, use the keys shown on the left margin. 1 Connect a load to the desired output terminals. With power-off, connect a load to the desired output terminals. Power 2 2 Turn on the power supply. The power supply will go into the power-on / reset state; all outputs are disabled (the OFF annunciator turns on); the display is selected for the +6V supply (the +6V annunciator turns on); and the knob is selected for voltage control. Output On/Off 3 Enable the outputs. The OFF annunciator turns off and the +6V and CV annunciators are lit. The blinking digit can be adjusted by turning the knob. Notice that the display is in the meter mode. "Meter mode" means that the display shows the actual output voltage and current. To set up the power supply for +25V supply or -25V supply operation, you should press the +25V or -25V key to select the display and adjust for +25V supply or -25V supply before proceeding to the next step. Display Limit 4 Set the display for the limit mode. Notice that the Lmt annunciator blinks, indicating that the display is in the limit mode. When the display is in the limit mode, you can see the voltage and current limit values of the selected supply. In constant voltage mode, the voltage values between meter mode and limit mode are the same, but the current values are not. Further if the display is in the meter mode, you cannot see the change of current limit value when adjusting the knob. We recommend that you should set the display to "limit" mode to see the change of current limit value in constant voltage mode whenever adjusting the knob. 29 Chapter 2 Quick Start To use the power supply in constant voltage mode Vol/Cur 5 Adjust the knob for the desired current limit. 1 Check that the Lmt annunciator still blinks. Set the knob for current control. The second digit of ammeter will be blinking. Adjust the knob to the desired current limit. Vol/Cur 6 Adjust the knob for the desired output voltage. 1 Set the knob for voltage control. The second digit of the voltmeter will be blinking. Adjust the knob to the desired output voltage. Display Limit 7 Return to the meter mode. Display Limit key or let the display time-out after several seconds to return to the meter mode. Notice that the Lmt annunciator turns off and the display returns to the meter mode. In the meter mode, the display shows the actual output voltage and current of the selected supply. 8 Verify that the power supply is in the constant voltage mode. If you operate the +6V supply in the constant voltage (CV) mode, verify that CV and +6V annunciators are lit. If you operate the power supply for +25V supply or -25V supply, the +25V or -25V annunciator will turn on. If the CC annunciator is lit, choose a higher current limit. Note During actual CV operation, if a load change causes the current limit to be exceeded, the power supply will automatically crossover to constant current mode at the preset current limit and the output voltage will drop proportionately. 1You can use the resolution selection keys to move the blinking digit to the right or left when setting the voltage and current. 30 Chapter 2 Quick Start To use the power supply in constant current mode To use the power supply in constant current mode To set up the power supply for constant current (CC) operation, proceed as follows. For each step, use the keys shown on the left margin. 1 Connect a load to the output terminals of the desired supply. With power-off, connect a load to the desired output terminals. Power 2 2 Turn on the power supply. The power supply will go into the power-on / reset state; all outputs are disabled (the OFF annunciator turns on); the display is selected for the +6V supply (the +6V annunciator turns on); and the knob is selected for voltage control. Output On/Off 3 Enable the outputs The OFF annunciator turns off and the +6V and CV annunciators are lit. The blinking digit can be adjusted by turning the knob. Notice that the display is in the meter mode. "Meter mode" means that the display shows the actual output voltage and current. To set up the power supply for +25V supply or -25V supply operation, you should press the +25V or -25V key to select the display and adjust for +25V supply or -25V supply before proceeding to the next step. Display Limit 4 Set the display for the limit mode. Notice that the Lmt annunciator blinks, indicating that the display is in the limit mode. When the display is in the limit mode, you can see the voltage and current limit values of the selected supply. In constant current mode, the current values between meter mode and limit mode are the same, but the voltage values are not. Further if the display is in the meter mode, you cannot see the change of voltage limit value when adjusting the knob. We recommend that you should set the display to "limit" mode to see the change of voltage limit value in constant current mode whenever adjusting the knob. 31 Chapter 2 Quick Start To use the power supply in constant current mode 5 Adjust the knob for the desired voltage limit. 1 Check that the knob is still selected for voltage control and the Lmt annunciator blinks. Adjust the knob for the desired voltage limit. Vol/Cur 6 Adjust the knob for the desired output current. 1 Set the knob for current control. The second digit of the ammeter will be blinking. Adjust the knob to the desired current output. Display Limit 7 Return to the meter mode. Press the Display Limit key or let the display time-out after several seconds to return the meter mode. Notice that the Lmt annunciator turns off and the display returns to the meter mode. In the meter mode, the display shows the actual output voltage and current of the selected supply. 8 Verify that the power supply is in the constant current mode. If you operate the +6V supply in the constant current (CC) mode, verify that CC and +6V annunciators are lit. If you operate the power supply for +25V supply or -25V supply, the +25V or -25V annunciator will turn on. If the CV annunciator is lit, choose a higher voltage limit. Note During actual CC operation, if a load change causes the voltage limit to be exceeded, the power supply will automatically crossover to constant voltage mode at the preset voltage limit and the output current will drop proportionately. 1 You can use the resolution selection keys to move the blinking digit to the right or left when setting the voltage and current. 32 Chapter 2 Quick Start To use the power supply in track mode To use the power supply in track mode The 25V supplies provide 0 to 25 V tracking outputs. In the track mode, two voltages of the 25V supplies track each other to within (0.2% of output + 20 mV) for convenience in varying the symmetrical voltages needed by operational amplifiers and other circuits using balanced positive and negative inputs. To operate the power supply in the track mode, proceed as follows: 1 Set the +25V supply to the desired voltage as described in previous section "To use the power supply in constant voltage mode" (see page 29 for detailed information). Track 2 2 Enable the track mode. The Track key must be depressed for at least 1 second to enable the track mode. When the track mode is first enabled, the -25V supply will be set to the same voltage level as the +25V supply. Once enabled, any change of the voltage level in either the +25V supply or the -25V supply will be reflected in other supply. The current limit is independently set for each of the +25V or the -25V supply and is not affected by the track mode. 3 Verify that 25V supplies track each other properly. You can verify that the voltage of the -25V supply tracks that of the +25V supply within (0.2% of output + 20 mV) from the front-panel display by comparing the voltage values of the +25V supply and the -25V supply. In the track mode, if the CC annunciator is lit when the display is selected for the +25V supply, choose a higher current limit for the +25V supply. If the CC annunciator is lit when the display is selected for the -25V supply, choose a higher current limit for the -25V supply. 33 Chapter 2 Quick Start To store and recall the instrument state To store and recall the instrument state You can store up to three different operating states in non-volatile memory. This also enables you to recall the entire instrument state with just a few key presses from the front panel. The memory locations are supplied from the factory for front panel operation with the following states: display and knob selection for +6V output; *RST values of voltage and current limits for three outputs; output disabled; and track off state. *RST values for +6V supply are 0 V and 5 A and 0 V and 1 A for the 25V supplies. The following steps show you how to store and recall an operating state. 1 Set up the power supply for the desired operating state. The storage feature "remembers" the display and knob selection state, the limit values of voltage and current for three outputs, output on/off state, and track mode state. Store 2 Turn on the storage mode. Three memory locations (numbered 1, 2, and 3) are available to store the operating states. The operating states are stored in non-volatile memory and are remembered when being recalled. Store 1 This message appears on the display for approximately 3 seconds. 3 Store the operating state in memory location "3". Turn the knob to the right to specify the memory location 3. Store 3 To cancel the store operation, let the display time-out after 3 seconds or press any other function key except the Store key. The power supply returns to the normal operating mode and to the function pressed. 34 Chapter 2 Quick Start To store and recall the instrument state Store 4 Save the operating state. The operating state is now stored. To recall the stored state, go to the following steps. done This message appears on the display for approximately 1 second. Recall 2 5 Turn on the recall mode. Memory location "1" will be displayed in the recall mode. recall 1 This message appears on the display for approximately 3 seconds. 6 Recall the stored operating state. Turn the knob to the right to change the displayed storage location to "3". recall 3 If this setting is not followed within 3 seconds with a Recall key stroke, the power supply returns to normal operating mode and will not recall the instrument state 3 from memory. Recall 7 Restore the operating state. The power supply should now be configured in the same state as when you stored the state on the previous steps. done This message appears on the display for approximately 1 second. 35 Chapter 2 Quick Start To rack mount the power supply To rack mount the power supply The power supply can be mounted in a standard 19-inch rack cabinet using one of three optional kits available. A rack-mounting kit for a single instrument is available as Option 1CM (P/N 5062-3957). Installation instructions and hardware are included with each rack-mounting kit. Any Agilent Technologies System II instrument of the same size can be rack-mounted beside the Agilent E3631A power supply. To rack mount the power supply, follow these procedures. Remove the front and rear bumpers before rack-mounting the power supply. Front Rear (bottom view) To remove the rubber bumper, stretch a corner and then slide it off. To rack mount a single instrument, order adapter kit 5063-9243. 36 Chapter 2 Quick Start To rack mount the power supply 2 To rack mount two instruments of the same depth side-by-side, order lock-link kit 5061-9694 and flange kit 5063-9214. To install two instruments in a sliding support shelf, order suport shelf 50639256, and slide kit 1494-0015. 37 Chapter 2 Quick Start To rack mount the power supply 38 3 Calibration Procedures Calibration Procedures This chapter contains procedures for verification of the power supply's performance and calibration (adjustment). The chapter is divided into the following sections: Agilent Technologies Calibration Services, page 41 Calibration Interval, page 41 Automating Calibration Procedures, page 42 Recommended Test Equipment, page 42 Test Considerations, page 43 Performance Verification Tests, page 44 Measurement Techniques, page 45 Constant Voltage (CV) Verifications, page 47 Constant Current (CC) Verifications, page 54 Performance Test Record for Agilent E3631A, page 59 Calibration Security Code, page 61 Calibration Count, page 65 Calibration Message, page 65 General Calibration/Adjustment Procedure, page 66 Aborting a Calibration in Progress, page 71 Calibration Record for Agilent E3631A, page 72 Error Messages, page 73 Calibration Program, page 75 The performance verification tests for constant voltage (CV) and constant current (CC) operations use the power supply's specifications listed in chapter 1, Specifications, starting on page 13. 40 Chapter 3 Calibration Procedures Agilent Technologies Calibration Services Closed-Case Electronic Calibration The power supply features closedcase electronic calibration since no internal mechanical adjustments are required for normal calibration. The power supply calculates correction factors based upon the input reference value you enter. The new correction factors are stored in non-volatile memory until the next calibration adjustment is performed. (Non-volatile memory does not change when power has been off or after a remote interface reset.) Agilent Technologies Calibration Services When your power supply is due for calibration, contact your local Agilent Technologies Service Center for a low-cost calibration. The Agilent E3631A power supply is supported on calibration processes which allow Agilent Technologies to provide this service at competitive prices. 3 Calibration Interval The power supply should be calibrated on a regular interval determined by the accuracy requirements of your application. A 1-year interval is adequate for most applications. Agilent Technologies does not recommend extending calibration intervals beyond 1 year for any application. Agilent Technologies recommends that complete re-adjustment should always be performed at the calibration interval. This will increase your confidence that the Agilent E3631A will remain within specification for the next calibration interval. This criteria for re-adjustment provides the best long-term stability. 41 Chapter 3 Calibration Procedures Automating Calibration Procedures Automating Calibration Procedures You can automate the complete verification procedures outlined in this chapter if you have access to programmable test equipment. You can program the instrument configurations specified for each test over the remote interface. You can then enter readback verification data into a test program and compare the results to the appropriate test limit values. You can also enter calibration constants from the remote interface. Remote operation is similar to the local front-panel procedure. You can use a computer to perform the adjustment by first selecting the required setup. The calibration value is sent to the power supply and then the calibration is initiated over the remote interface. The power supply must be unsecured prior to initiating the calibration procedure. An Agilent BASIC program for calibration over the GPIB interface is listed at the end of this chapter. For further details on programming the power supply, see chapters 3 and 4 in the Agilent E3631A User's Guide. Recommended Test Equipment The test equipment recommended for the performance verification and adjustment procedures is listed below. If the exact instrument is not available, use the accuracy requirements shown to select substitute calibration standards. Table 3-1 Recommended Test Equipment Instrument GPIB Controller Oscilloscope RMS Voltmeter Digital Voltmeter Requirements Full GPIB capabilities 100 MHz 20 MHz Resolution: 0.1 mV Accuracy: 0.01% Recommended Model Agilent 82341C interface card Agilent 54602A Use Programming and readback accuracy Display transient response and ripple & noise waveform Measure rms ripple & noise Agilent 34401A Measure dc voltages Measure load and line regulations and transient response time. Measure ripple and noise Constant current test setup Electronic Load Voltage Range: 50 Vdc Current Range: 10 Adc Agilent 6063A Open and Short Switches Transient On/Off 1.2 , 100 W 25 , 100 W 0.1 , 0.01% Resistive Loads (RL) Current monitoring Resistor (Shunt) 42 Chapter 3 Calibration Procedures Test Considerations Test Considerations To ensure proper instrument operation, verify that you have selected the correct power-line voltage prior to attempting any test procedure in this chapter. See page 24 in chapter 2 for more information. Assure that the calibration ambient temperature is stable and between 20 C and 30 C. Assure ambient relative humidity is less than 80%. Allow a 1-hour warm-up period before verification or calibration. Keep cables as short as possible, consistent with the impedance requirements. 3 Caution The tests should be performed by qualified personnel. During performance verification tests, hazardous voltages may be present at the outputs of the power supply. 43 Chapter 3 Calibration Procedures Performance Verification Tests Performance Verification Tests The performance verification tests use the power supply's specifications listed in chapter 1, "Specifications", starting on page 13. You can perform two different levels of performance verification tests: Self-Test A series of internal verification tests that provide high confidence that the power supply is operational. Performance Verification Tests These tests can be used to verify the power supply's specifications following repairs to specific circuits. The performance test procedures must be performed on each output. Self-Test A power-on self-test occurs automatically when you turn on the power supply. This limited test assures you that the power supply is operational. The complete self-test is enabled by pressing the Recall key (actually any front panel keys except the Error key) and the power-line switch simultaneously and then continuing to press the Recall key for 5 seconds. The complete self-test will be finished in 2 more seconds. You can also perform a self-test from the remote interface (see chapter 3 in the Agilent E3631A User's Guide). If the self-test is successful, "PASS" is displayed on the front panel. If the self-test fails, "FAIL" is displayed and the ERROR annunciator turns on. If repair is required, see chapter 5, "Service", starting on page 91, for further details. If self-test passes, you have a high confidence that the power supply is operational. Performance Verification Tests These tests can be used to verify the power supply's specifications following repairs to specific circuits. The following sections explain all verification procedures in detail. All of the performance test specifications are shown in each test. 44 Chapter 3 Calibration Procedures Measurement Techniques Measurement Techniques Setup for Most Tests Most tests are performed at the front terminals as shown in the following figure. Measure the dc voltage directly at the (+) and (-) terminals on the front panel. 3 Figure 3-1. Performance Verification Test Setup Electronic Load Many of the test procedures require the use of a variable load resistor capable of dissipating the required power. Using a variable load resistor requires that switches be used to connect, disconnect, and short the load resistor. An electronic load, if available, can be used in place of a variable load resistor and switches. The electronic load is considerably easier to use than load resistors. It eliminates the need for connecting resistors or rheostats in parallel to handle power, it is much more stable than carbon-pile load, and it makes easy work of switching between load conditions as is required for the load regulation and load transient response tests. Substitution of the electronic load requires minor changes to the test procedures in this chapter. General Measurement Techniques To achieve best results when measuring load regulation, peak to peak voltage, and transient response time of the power supply, measuring devices must be connected through the hole in the neck of the binding post at (A) while the 45 Chapter 3 Calibration Procedures Measurement Techniques load resistor is plugged into the front of the output terminals at (B). A measurement made across the load includes the impedance of the leads to the load. The impedance of the load leads can easily be several orders of the magnitude greater than the power supply impedance and thus invalidate the measurement. To avoid mutual coupling effects, each measuring device must be connected directly to the output terminals by separate pairs of leads. Front Panel Terminal Connections (Side View) Current-Monitoring Resistor To eliminate output current measurement error caused by the voltage drops in the leads and connections, connect the current monitoring resistor between the (-) output terminal and the load as a four-terminal device. Connect the current-monitoring leads inside the load-lead connections directly at the monitoring points on the resistor element (see RM in Figure 3-1). Programming Most performance tests can be performed only from the front panel. However, a GPIB or RS-232 controller is required to perform the voltage and current programming accuracy and readback accuracy tests. The test procedures are written assuming that you know how to program the power supply either from the front panel or from an GPIB or RS-232 controller. Complete instructions on front panel and remote programming are given in the Agilent E3631A User's Guide. Voltage and Current Values The full-scale and maximum values of each supply are listed below. You can use this table when you test CV and CC performance verification tests. Table 3-2 Power Supply Voltage and Current Values Output +6V Output +25V Output -25V Output Full-Scale Voltage +6 V +25 V -25 V Max. Prog. Voltage +6.18 V +25.75 -25.75 Full-Scale Current 5A 1A 1A Max. Prog. Current 5.15 A 1.03 A 1.03 A 46 Chapter 3 Calibration Procedures Constant Voltage (CV) Verifications Constant Voltage (CV) Verifications Constant Voltage Test Setup If more than one meter or a meter and an oscilloscope are used, connect each to the (+) and (-) terminals by a separate pair of leads to avoid mutual coupling effects. Use coaxial cable or shielded 2-wire cable to avoid noise pick-up on the test leads. Voltage Programming and Readback Accuracy This test verifies that the voltage programming and GPIB or RS-232 readback functions are within specifications. Note that the readback values over the remote interface should be identical to those displayed on the front panel. You should program the power supply over the remote interface for this test to avoid round off errors. 1 Turn off the power supply and connect a digital voltmeter between the (+) and (-) terminals of the output to be tested as shown in Figure 3-1. 2 Turn on the power supply. Enable the outputs and select the desired output to be tested by sending the commands: OUTP ON INST {P6V|P25V|N25V} 3 Program the selected output to zero volts and maximum programmable current (see Table 3-2) by sending the commands: VOLT 0 CURR 5.15 CURR 1.03 for the +6V supply or for the 25V supply 3 4 Record the output voltage reading on the digital voltmeter (DVM). The readings should be within the limits specified below for each output tested. Also, note that the CV, Adrs, Lmt, and Rmt annunciators are on. Output +6V +25V -25V Programming Accuracy 0 5 mV 0 20 mV 0 20 mV 47 Chapter 3 Calibration Procedures Constant Voltage (CV) Verifications 5 Readback the output voltage of the selected output over the remote interface by sending the command: MEAS:VOLT? {P6V|P25V|N25V} 6 Record the value displayed on the controller. This value should be within the limits specified below for each output tested. Output +6V +25V -25V Programming Accuracy DVM 5 mV DVM 10 mV -(DVM 10 mV) 7 Program the selected output's voltage to full scale value by sending the commands. VOLT 6.0 for the +6V supply or VOLT 25.0 for the 25V supply 8 Record the output voltage reading on the digital voltmeter (DVM). The readings should be within the limits specified below for each output tested. Output +6V +25V -25V Programming Accuracy 6 V 11 mV 25 V 32.5 mV -(25 V 32.5 mV) 9 Readback the output voltage of the selected output over the remote interface by sending the command: MEAS:VOLT? {P6V|P25V|N25V} 10 Record the value displayed on the controller. This value should be within the limits specified below for the output to be tested. Output +6V +25V -25V Programming Accuracy DVM 11 mV DVM 22.5 mV -(DVM 22.5 mV) 11 Repeat steps (1) through (10) for the remaining outputs. 48 Chapter 3 Calibration Procedures Constant Voltage (CV) Verifications CV Load Regulation This test measures the change in the output voltage resulting from a change in the output current from full to no load. 1 Turn off the power supply and connect a digital voltmeter between the (+) and (-) terminals of the output to be tested as shown in Figure 3-1. 2 Turn on the power supply and select the desired output to be tested using the meter and adjust selection key on the front panel. Enable the outputs and set the display to the limit mode. When the display is in the limit mode, program the current of the selected output to the maximum programmable value and the voltage to the full-scale value (see Table 3-2). 3 Operate the electronic load in constant current mode and set its current to the full scale value of the output to be tested (see Table 3-2). Check that the front panel CV annunciator remains lit. If not lit, adjust the load so that the output current drops slightly until the CV annunciator lights. Record the output voltage reading on the digital voltmeter. 4 Operate the electronic load in open mode (input off). Record the output voltage reading on the digital voltmeter again. The difference between the digital voltmeter readings in steps (3) and (4) is the CV load regulation. The difference of the readings should be within the limit specified below for each output tested. Output +6V +25V -25V 3 Programming Accuracy 2.6 mV 4.5 mV 4.5 mV 5 Repeat steps (1) through (4) for the remaining outputs. 49 Chapter 3 Calibration Procedures Constant Voltage (CV) Verifications CV Line Regulation This test measures the change in output voltage that results from a change in ac line voltage from the minimum value (10% below the nominal input voltage) to maximum value (10% above the nominal input voltage). 1 Turn off the power supply and connect a digital voltmeter between the (+) and (-) terminals of the output to be tested as shown in Figure 3-1. 2 Connect the ac power line through a variable voltage transformer. 3 Turn on the power supply and select the desired output to be tested using the meter and adjust selection key on the front panel. Enable the outputs and set the display to the limit mode. When the display is in the limit mode, program the current of the selected output to the maximum programmable value and the voltage to full-scale value (see Table 3-2). 4 Operate the electronic load in constant current mode and set its current to the full scale value (see Table 3-2) of the output to be tested. Check that the front panel CV annunciator remains lit. If not lit, adjust the load so that the output current drops slightly until the CV annunciator lights. 5 Adjust the transformer to low line voltage limit (104 Vac for nominal 115 Vac, 90 Vac for nominal 100 Vac, or 207 Vac for nominal 230 Vac). Record the output reading on the digital voltmeter. 6 Adjust the autotranformer to high line voltage (127 Vac for nominal 115 Vac, 110 Vac for nominal 100 Vac, or 253 Vac for nominal 230 Vac). Record the voltage reading on the digital voltmeter. The difference between the digital voltmeter readings in steps (5) and (6) is the CV line regulation. The difference of the readings should be within the limit specified below for each output tested. Output +6V +25V -25V 2.6 mV 4.5 mV 4.5 mV Difference 7 Repeat steps (1) through (6) for the remaining outputs. 50 Chapter 3 Calibration Procedures Constant Voltage (CV) Verifications Normal Mode Voltage Noise (CV Ripple and Noise) The normal mode voltage noise is in the form of ripple related to the line frequency plus some random noise. The normal mode voltage noise is specified as the rms or peak-to-peak output voltage in a frequency range from 20 Hz to 20 MHz. 1 Turn off the power supply and connect the output to be tested as shown in Figure 3-1 to an oscilloscope (ac coupled) between (+) and (-) terminals. Set the oscilloscope to AC mode and bandwidth limit to 20 MHz. Connect a resistive load (1.2W for +6V supply and 25W for 25V supplies) as shown in Figure 3-1 (see Table 3-2). 2 Turn on the power supply and select the output to be tested using the meter and adjust selection key on the front panel. Enable the outputs and set the display to the limit mode. When the display is in the limit mode, program the current of the selected output to the maximum programmable value and the voltage to the full-scale value (see Table 3-2). 3 Check that the front panel CV annunciator remains lit. If not lit, adjust the load down slightly. 4 Note that the waveform on the oscilloscope does not exceed the peak-to-peak limit of 2 mV for each of the three outputs. 5 Disconnect the oscilloscope and connect an AC rms voltmeter in its place. The rms voltage reading does not exceed the rms limit of 0.35 mV for each of the three outputs. 6 Repeat steps (1) through (5) for the remaining outputs. 3 51 Chapter 3 Calibration Procedures Constant Voltage (CV) Verifications Common Mode Current Noise The common mode current is that ac current component which exists between any or all outputs or output lines and chassis ground. Common mode noise can be a problem for very sensitive circuitry that is referenced to earth ground. When a circuit is referenced to earth ground, a low level line-related ac current will flow from the output terminals to earth ground. Any impedance to earth ground will create a voltage drop equal to the output current flow multiplied by the impedance. 1 Turn off the power supply and connect a 100 kW resistor (RS) and a 2200 pF capacitor in parallel between the (-) terminal and chassis ground for +6V output or between the (COM) terminal and chassis ground for 25V outputs. 2 Connect a digital voltmeter across RS. 3 Turn on the power supply and select the output to be tested using the meter and adjust selection key on the front panel. Enable the outputs and set the display to the limit mode. When the display is in the limit mode, program the current of the selected output to the maximum programmable value and the voltage to the full-scale value (see Table 3-2). 4 Record the voltage across RS and convert it to current by dividing by the resistance (DVM reading/100 kW). Note that the current is less than 1.5 mA for each of the three outputs. 5 Repeat steps (1) through (4) for the remaining outputs. 52 Chapter 3 Calibration Procedures Constant Voltage (CV) Verifications Load Transient Response Time This test measures the time for the output voltage to recover to within 15 mV of nominal output voltage following a load change from full load to half load, or half load to full load. 1 Turn off the power supply and connect the output to be tested as shown in Figure 3-1 with an oscilloscope. Operate the electronic load in constant current mode. 2 Turn on the power supply and select the output to be tested using the meter and adjust selection key on the front panel. Enable the outputs and set the display to the limit mode. When the display is in the limit mode, program the current to the maximum programmable value and the voltage to the full-scale value (see Table 3-2). 3 Set the electronic load to transient operation mode between one half of the output's full scale value and the output's full scale value at a 1 kHz rate with 50% duty cycle. 4 Set the the oscilloscope for ac coupling, internal sync, and lock on either the positive or negative load transient. 5 Adjust the the oscilloscope to display transients as shown in Figure 3-2. Note that the pulse width (t2-t1) of the transients at 15 mV from the base line is no more than 50 msec for each of the three outputs. 6 Repeat steps (1) through (5) for the remaining outputs. 3 Figure 3-2. Transient Response Time 53 Chapter 3 Calibration Procedures Constant Current (CC) Verifications Constant Current (CC) Verifications Constant Current Test Setup Follow the general setup instructions in the "Measurement Techniques" section starting on page 45 and the specific instructions will be given in the following paragraphs. Current Programming and Readback Accuracy This test verifies that the current programming and GPIB or RS-232 readback functions are within specifications. Note that the readback values over the remote interface should be identical to those displayed on the front panel. The accuracy of the current monitoring resistor must be 0.1% or better. You should program the power supply over the remote interface for this test to avoid round off errors. 1 Turn off the power supply and connect a 0.19 current monitoring resistor (RM) across the output to be tested and a digital voltmeter across the current monitoring resistor (RM). 2 Turn on the power supply. Enable the outputs and select the desired output to be tested by sending the commands: OUTP ON INST {P6V|P25V|N25V} 3 Program the selected output voltage to 5.0 volts and the current to 0 amps by sending the commands: VOLT 5 CURR 0 4 Divide the voltage drop (DVM reading) across the current monitoring resistor (RM) by its resistance to convert to amps and record this value (IO). This value should be within the limits specified below for each output tested. Also, note that the CC, Adrs, Lmt, and Rmt annunciators are on. Output +6V +25V -25V Programming Accuracy 10 mA 4 mA 0 A 4 mA 0A 0A 54 Chapter 3 Calibration Procedures Constant Current (CC) Verifications 5 Readback the output current from the selected output over the remote interface by sending the command: MEAS:CURR? {P6V|P25V|N25V} 6 Record the value displayed on the controller. This value should be within the limits specified below for each output tested. Output +6V +25V -25V Readback Accuracy IO 10 mA IO 4 mA IO 4 mA 7 Program the selected output current to the full scale value (see Table 3-2) by sending the commands: CURR 5.0 CURR 1.0 for the +6V supply or for the 25V supply 3 8 Divide the voltage drop (DVM reading) across the current monitoring resistor (RM) by its resistance to convert to amps and record this value (IO). This value should be within the limits specified below for each output tested. Output +6V +25V -25V Programming Accuracy 20 mA 5.5 mA 1 A 5.5 mA 5A 1A 9 Readback the output current from the selected output over the remote interface by sending the command: MEAS:CURR? {P6V|P25V|N25V} 10 Record the value displayed on the controller. This value should be within the limits specified below for each output tested. Output +6V +25V -25V IO Readback Accuracy 20 mA IO 5.5 mA IO 5.5 mA 11 Repeat steps (1) through (10) for the remaining outputs. 55 Chapter 3 Calibration Procedures Constant Current (CC) Verifications CC Load Regulation This test measures the change in output current resulting from a change in the load from full-scale output voltage to short circuit. 1 Turn off the power supply and connect the output to tested as shown in Figure 3-1 with the digital voltmeter connected across the 0.19 current monitoring resistor (RM). 2 Turn on the power supply and select the desired output to be tested using the meter and adjust selection key on the front panel. Enable the outputs and set the display to the limit mode. When the display is in the limit mode, program the voltage to the maximum programmable value and the current to the fullscale value (see Table 3-2). 3 Operate the electronic load in constant voltage mode and set its voltage to the full scale value of the output to be tested (see Table 3-2). Check that the CC annunciator is on. If it is not, adjust the load so that the output voltage drops slightly. Record the current reading by dividing the voltage reading on the digital voltmeter by the resistance of the current monitoring resistor. 4 Operate the electronic load in short (input short) mode. Record the current reading again by dividing the voltage reading on the digital voltmeter by the resistance of the current monitoring resistor. The difference between the current readings in step (3) and (4) is the load regulation current. The difference of the readings should be within the limit specified below for each output tested. Output +6V +25V -25V 0.75 mA 0.35 mA 0.35 mA Difference 5 Repeat steps (1) through (4) for the remaining outputs. 56 Chapter 3 Calibration Procedures Constant Current (CC) Verifications CC Line Regulation This test measures the change in output current that results from a change in ac line voltage from the minimum value (10% below the nominal input voltage) to the maximum value (10% above nominal voltage). 1 Turn off the power supply and connect the output to be tested as shown in Figure 3-1 with the digital voltmeter connected across the current monitoring resistor (RM). 2 Connect the ac power line through a variable voltage transformer. 3 Turn on the power supply and select the desired output to be tested using the meter selection key on the front panel. Enable the outputs and set the display to the limit mode. When the display is in the limit mode, program the voltage to the maximum programmable value and the current to the full-scale value (see Table 3-2). 4 Operate the electronic load in constant voltage mode and set its voltage to the full scale value of the output to be tested (see Table 3-2). Check that the CC annunciator remains lit. If not lit, adjust the load so that the output voltage drops slightly until the CC annunciator lights. 5 Adjust the transformer to low line voltage limit (104 Vac for nominal 115 Vac, 90 Vac for nominal 100 Vac, or 207 Vac for nominal 230 Vac). Record the output current reading by dividing the voltage reading on the digital voltmeter by the resistance of the current monitoring resistor. 6 Adjust the transformer to 10% above the nominal line voltage (110 Vac for a 100 Vac nominal input, 127 Vac for a 115 Vac nominal input or 253 Vac for a 230 Vac nominal input). Record the current reading again by dividing the voltage reading on the digital voltmeter by the resistance of the current monitoring resistor. The difference between the current readings in step (5) and (6) is the load regulation current. The difference of the readings should be within the limit specified below for each output tested. Output +6V +25V -25V 0.75 mA 0.35 mA 0.35 mA 3 Difference 7 Repeat steps (1) through (6) for the remaining outputs. 57 Chapter 3 Calibration Procedures Constant Current (CC) Verifications Normal Mode Current Noise (CC Ripple and Noise) The normal mode current noise is specified as the rms output current in a frequency range 20 Hz to 20 MHz with the power supply in constant current operation. 1 Turn off the power supply and connect the output to be tested as shown in Figure 3-1 with a load resistor (1.29 for +6V supply and 259 for 25V supplies) across output terminals to be tested. Connect a rms voltmeter across the load resistor. Use only a resistive load for this test. 2 Turn on the power supply and select the output to be tested using the meter selection key on the front panel. Enable the outputs and set the display to the limit mode. When the display is in the limit mode, program the current to fullscale value and the voltage to the maximum programmable value. 3 The output current should be at the full-scale rating with the CC annunciator on. If not lit, adjust the load so that the output voltage drops slightly until the CC annunciator lights. 4 Divide the reading on the rms voltmeter by the load resistance to obtain rms current. The readings should be within the limit specified below for each output tested. Output +6V +25V -25V 2 mA 0.5 mA 0.5 mA Specification 5 Repeat steps (1) through (4) for the remaining outputs. 58 Chapter 3 Calibration Procedures Performance Test Record for Agilent E3631A Performance Test Record for Agilent E3631A CV Performance Test Record Test Description CV Programming Accuracy @ 0 volts (DVM reading) +6V supply +25V supply -25V supply CV Readback Accuracy @ 0 volts +6V supply +25V supply -25V supply CV Programming Accuracy @ Full Scale (DVM reading) +6V supply +25V supply -25V supply CV Readback Accuracy @ Full Scale +6V supply +25V supply -25V supply CV Load Regulation +6V supply +25V supply -25V supply CV Line Regulation +6V supply +25V supply -25V supply CV Ripple/Noise +6V supply +25V supply -25V supply CV Current Noise (Common Mode) +6V supply +25V supply -25V supply Load Transient Response Time +6V supply +25V supply -25V supply Actual Result Specifications Upper Limit Lower Limit +0.0050 V +0.0200 V +0.0200 V -0.0050 V -0.0200 V -0.0200 V 3 DVM + 0.0050 V DVM - 0.0050 V DVM + 0.0100 V DVM - 0.0100 V -(DVM + 0.0100) V -(DVM - 0.0100) V 6.0110 V 25.0325 V -25.0325 V 5.9890 V 24.9675 V -24.9675 V DVM + 0.0110 V DVM - 0.0110 V DVM + 0.0225 V DVM - 0.0225 V -(DVM + 0.0225) V -(DVM - 0.0225) V Maximum change: <2.6 mV <4.5 mV <4.5 mV Maximum change: <2.6 mV <4.5 mV <4.5 mV <2 mV p-p, 0.35 mV rms for each of the three outputs <1.5 mA for each of the three outputs <50 msec for each of three outputs 59 Chapter 3 Calibration Procedures Performance Test Record for Agilent E3631A CC Performance Test Record Test Description CC Programming Accuracy @ 0 amps (IO) +6V supply +25V supply -25V supply CC Readback Accuracy @ 0 amps +6V supply +25V supply -25V supply CC Programming Accuracy @ Full Scale (IO) +6V supply +25V supply -25V supply CC Readback Accuracy @ Full Scale +6V supply +25V supply -25V supply CC Load Regulation +6V supply +25V supply -25V supply CC Line Regulation +6V supply +25V supply -25V supply CC Ripple/Noise +6V supply +25V supply -25V supply Actual Result Specifications Upper Limit +0.0100 A +0.0040 A +0.0040 A IO + 0.0100 A IO + 0.0040 A IO + 0.0040 A 5.0200 A 1.0055 A 1.0055 A IO + 0.0200 A IO + 0.0055 A IO + 0.0055 A Maximum change: <0.75 mA <0.35 mA <0.35 mA Maximum change: <0.75 mA <0.35 mA <0.35 mA <2 mA <0.5 mA <0.5 mA Lower Limit -0.0100 A -0.0040 A -0.0040 A IO - 0.0100 A IO - 0.0040 A IO - 0.0040 A 4.9800 A 0.9945 A 0.9945 A IO - 0.0200 A IO - 0.0055 A IO - 0.0055 A 60 Chapter 3 Calibration Procedures Calibration Security Code Calibration Security Code This feature allows you to enter a security code (electronic key) to prevent accidental or unauthorized calibrations of the power supply. When you first receive your power supply, it is secured. Before you can calibrate the power supply, you must unsecure it by entering the correct security code. A procedure to unsecure the power supply is given on the following page. The security code is set to "HP003631" when the power supply is shipped from the factory. The security code is stored in non-volatile memory, and does not change when power has been off or after a remote interface reset. To secure the power supply from the remote interface, the security code may contain up to 12 alphanumeric characters as shown below. The first character must be a letter, but the remaining characters can be letters or numbers. You do not have to use all 12 characters but the first character must always be a letter. A_ _ _ _ _ _ _ _ _ _ _ (12 characters) 3 To secure the power supply from the remote interface so that it can be unsecured from the front panel, use the eight-character format shown below. The first two characters must be "H P" and the remaining characters must be numbers. Only the last six characters are recognized from the front panel, but all eight characters are required. To unsecure the power supply from the front panel, omit the "H P" and enter the remaining numbers as shown on the following pages. H P _ _ _ _ _ _ (8 characters) If you forget your security code, you can disable the security feature by adding a jumper inside the power supply, and then entering a new code. See the procedure on page 64. 61 Chapter 3 Calibration Procedures Calibration Security Code To Unsecure the Power Supply for Calibration The power supply can use a calibration security code to prevent unauthorized or accidental calibration. This procedure shows you how to unsecure the power supply for calibration from the front panel. Calibrate Power 1 Turn on the front-panel calibration mode. secured Turn on the calibration mode by pressing the "Calibrate" key while simultaneously turning on the power supply then continue to hold the "Calibrate" key for about 5 seconds until a beep is heard. If the power supply is secured, you will see the above message from the front panel for approximately one second. The "CAL MODE'' message is then displayed on the front panel. Secure 2 Move to the security code by pressing the "Secure" key. 000000 code 3 Enter the security code using the knob and resolution selection keys. 003631 code The security code is set to "HP003631" when the power supply is shipped from the factory. The security code is stored in non-volatile memory and does not change when the power has been off or after a remote interface reset. To enter the security code from the front panel, enter only the last six digits. To enter the security code from the remote interface, you may enter up to 12 characters. Use the resolution selection keys to move left or right between digits. Use the knob to change the digits. Notice that the security code may be different if the security code has been changed from the default setting. 62 Chapter 3 Calibration Procedures Calibration Security Code Secure 4 Unsecure the power supply. unsecured The power supply is unsecured when you press the Secure key. You will see the above message from the front panel for one second. The "CAL MODE" message is displayed on the front panel after above message. Power 5 Turn off the calibration mode. Turn off the power supply to exit the calibration mode. To re-secure the power supply (following calibration), perform this procedure again. 3 63 Chapter 3 Calibration Procedures Calibration Security Code To Unsecure the Power Supply Without the Security Code To unsecure the power supply without the correct security code (when you forget the security code), follow the steps below. See "Electrostatic Discharge (ESD) Precautions" in chapter 5 before beginning this procedure. 1 Disconnect the power cord and all load connections from front terminals. 2 Remove the instrument cover. Refer to the disassembly drawing on page 123. 3 Connect the power cord and turn on the calibration mode by pressing the "Calibrate" key while simultaneously turning on the power supply then continue to hold the "Calibrate" key for about 5 seconds until a beep is heard. Be careful not to touch the power line connections. 4 Apply a short between the two exposed metal pads on JP1 (located near main controller U17 on the top board). The exposed metal pads are outlined with a small rectangular silkscreen. (See the component locator drawing for the E3631-60002 top PC board on page 124.) 5 While maintaining the short, move to the security code and enter any unsecure code in the calibration mode. The power supply is now unsecured. 6 Remove the short at JP1. (An error occurs if not removed.) 7 Turn off and reassemble the power supply. Now you can enter a new security code. Be sure you take note of the new security code. 64 Chapter 3 Calibration Procedures Calibration Count Calibration Count The calibration count feature provides an independent "serialization" of your calibrations. You can determine the number of times that your power supply has been calibrated. By monitoring the calibration count, you can determine whether an unauthorized calibration has been performed. Since the value increments by one for each calibration parameter (see Table 3-3 on the next page), a complete calibration increases the value by 6 counts. The calibration count is stored in non-volatile memory and does not change when power has been off or after a remote interface reset. Your power supply was calibrated before it left the factory. When you receive the power supply, read the calibration count to determine its value. The calibration count increments up to a maximum of 32,767 after which it wraps around to 0. No way is provided to program or reset the calibration count. 3 Calibration Message You can use the calibration message feature to record calibration information about your power supply. For example, you can store such information as the last calibration date, the next calibration due date, the power supply's serial number, or even the name and phone number of the person to contact for a new calibration. You can record and read information in the calibration message from the remote interface only. The calibration message may contain up to 40 characters. The calibration message is stored in non-volatile memory and does not change when power has been off or after a remote interface reset. 65 Chapter 3 Calibration Procedures General Calibration/Adjustment Procedure General Calibration/Adjustment Procedure The calibration procedures from the front panel are described in this section. For output voltage calibration, disconnect all loads from the power supply and connect a DVM across the output terminals to be calibrated. For output current calibration, disconnect all loads from the power supply, connect an appropriate current monitoring resistor across the output terminals to be calibrated, and connect a DVM across the terminals of the monitoring resistor. The following table shows calibration parameters and points which should be used to calibrate the output voltage and current for each of the three outputs. Table 3-3. Parameters for Calibration Output Calibration Parameter CAL SETUP 1 +6V output CAL SETUP 2 CAL SETUP 3 +25V output CAL SETUP 4 CAL SETUP 5 -25V output CAL SETUP 6 Current Current Voltage Current Voltage Voltage/ Current Voltage Calibration Point mnemonic V LO V HI I LO I HI V LO V HI V LO I HI V LO V HI I LO I HI Note You can terminate any CAL SETUP without changing its calibration constants by turning off power. 66 Chapter 3 Calibration Procedures General Calibration/Adjustment Procedure To calibrate the output voltages and currents of the power supply from the front panel, proceed as follows: 1 Unsecure the power supply. To calibrate the output voltage and current, you must unsecure the power supply according to the procedure given on page 62. 2 Disconnect all loads from the power supply and connect a DVM across output terminals of the +6V output. Calibrate Power 3 Turn on the calibration mode. cal mode Turn on the calibration mode by pressing the "Calibrate" key while simultaneously turning on the power supply then continue to hold the "Calibrate" key for about 5 seconds until a beep is heard. Make sure that the power supply is in "CV" mode. If the power supply is not in "CV" mode, an error occurs. Calibrate 3 4 Move down a level to the voltage calibration mode for the +6V supply. cal setup 1 The display shows the above message to indicate that the power supply is ready for the voltage calibration of +6V supply. Calibrate 5 Select the first voltage calibration point for the +6V supply. v lo +0.1000 v 1 The display shows the first voltage calibration point for the +6V supply. 6 Read the DVM and change the first voltage value on the display to match the measured voltage. For example, if the DVM reading is 0.0860 V, adjust the voltage to 0.0860 V using the knob and resolution selection keys. v lo +0.0860 v 67 Chapter 3 Calibration Procedures General Calibration/Adjustment Procedure Calibrate 7 Pressing the "Calibrate" key saves the change and selects the second voltage calibration point for the +6V supply. v hi +5.7000v If the entered number is within an acceptable range, an "ENTERED" message appears for one second. The display now shows the second voltage calibration point for the +6V supply. If the entered number is not correct, an "INVALID DATA" message appears for one second and the display shows the first voltage calibration point again. 8 Read the DVM and change the second voltage value on the display to match the measured voltage. For example, if the DVM reads 5.9990 V, adjust the voltage to 5.9990 V using the knob and arrow keys. v hi +5.9990v Calibrate 9 Pressing the "Calibrate" key saves the new calibration constants for the +6V output voltage and goes to the current calibration mode for the +6V supply. cal setup 2 If the entered number is within an acceptable range, a "CALIBRATING" message appears for one second to indicate that the calibration is successful and that new calibration constants of "SETUP 1" are stored. Then, the display shows the above message to indicate that the power supply is ready for the current calibration for +6V supply. If the entered number is not correct, an "INVALID DATA" message appears for one second and the display shows the second voltage calibration point again. If the calibration fails, a "CAL FAIL" message appears for one second and the display shows the "CAL SETUP 1" for the voltage calibration of the +6V supply again. 68 Chapter 3 Calibration Procedures General Calibration/Adjustment Procedure Connect an appropriate shunt (see Table 3-1 on page 42) across the +6V supply's output terminals, and connect a digital voltmeter across the shunt resistor for the current calibration. Calibrate 10 Select the first current calibration point for the +6V supply. i lo +0.100 a The display shows the first current calibration point for the +6V supply. 11 Read the DVM and change the first current value on the display to match the computed current (DVM reading by shunt resistance). For example, if the computed value is 0.099 A, adjust the current to 0.099 A using the knob and arrow keys. Notice that you should wait for the DVM reading to stabilize for accurate calibration. 3 i lo +0.099 a Calibrate 12 Pressing the "Calibrate" key saves the change and selects the second current calibration point for the +6V supply. i hi a +4.750 If the entered number is within an acceptable range, an "ENTERED" message appears for one second. The display now shows the second current calibration point for the +6V supply. If the entered number is not correct, an "INVALID DATA" message appears for one second and the display shows the first current calibration point again. 69 Chapter 3 Calibration Procedures General Calibration/Adjustment Procedure 13 Read the DVM and change the second current value on the display to match the computed current (DVM reading by shunt resistance). For example, if the computed value is 4.999 A, adjust the current to 4.999 A using the knob and arrow keys. Notice that you should wait for the DVM reading to stabilize for accurate calibration. i hi +4.999 a Calibrate 14 Pressing the "Calibrate" key saves the new calibration constants for the +6V output current and goes to the voltage calibration mode for the +25V supply. cal setup 3 If the entered number is within an acceptable range, a "CALIBRATING" message appears for one second to indicate that the calibration is successful and that new calibration constants of "SETUP 2" are stored. Then, the display shows the above message to indicate that the power supply is ready for the voltage calibration for +25V supply. If the entered number is not correct, an "INVALID DATA" message appears for one second and the display shows the second voltage calibration point again. If the calibration fails, a "CAL FAIL" message appears for one second and the display shows the "CAL SETUP 2" for the current calibration of the +6V supply again. 15 Repeat steps (5) through (14) for the voltage and current calibration of the +25V supply (replace +6V with +25V in all the text). You can calibrate the output voltage and current of the +25V supply easily in the same manner. Notice that you should connect a shunt across (+) and (COM) terminals of the 25V supply for the +25V supply current calibration. 16 Repeat steps (5) through (14) for the voltage and current calibration of the -25V supply (replace +6V with -25V in all the text). You can also calibrate the output voltage and current of the -25V supply easily in the same manner. Notice that you should connect a shunt across (-) and (COM) terminals of the 25V supply for the -25V supply current calibration. 70 Chapter 3 Calibration Procedures Aborting a Calibration in Progress Aborting a Calibration in Progress Sometimes it may be necessary to abort a calibration after the procedure has already been initiated. You can abort a calibration at any time by turning the power supply off from the front panel. When performing a calibration from the remote interface, you can abort a calibration by issuing a remote interface device clear message or by pressing the front-panel "Local" key. 3 71 Chapter 3 Calibration Procedures Calibration Record for Agilent E3631A Calibration Record for Agilent E3631A Step 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Calibration Description Unsecure the power supply (see page 62). Turn on "CAL MODE"(simultaneously press "Calibrate" and "Power" keys) until a beep is heard. Move down menu to "CAL SETUP 1" (press "Calibrate" key). "V LO 0.1000 V" appears on the display (change the display to match the DVM reading; then press ``Calibrate'' key). "V HI +5.7000 V" appears on the display (change the display to match the DVM reading; then press "Calibrate" key). "CAL SETUP 2" now appears on the display (press "Calibrate" key). "I LO 0.100 A" appears on the display (change the display to match the computed current through 0.19 resistor; then press "Calibrate" key). "I HI +4.750 A" appears on the display (change the display to match the computed current through 0.19 resistor; then press "Calibrate" key). "CAL SETUP 3" now appears on the display (press "Calibrate" key). "V LO 0.5000 V" appears on the display (change the display to match the DVM reading; then press "Calibrate" key). "V HI +24.750 V" appears on the display (change the display to match the DVM reading; then press ``Calibrate'' key). "CAL SETUP 4" now appears on the display (press "Calibrate" key). "I LO 0.100 A" appears on the display (change the display to match the computed current through 0.19 resistor; then press "Calibrate" key). "I HI +0.950 A" appears on the display (change the display to match the computed current through 0.19 resistor; then press "Calibrate" key). "CAL SETUP 5" now appears on the display (press "Calibrate" key). "V LO -0.5000 V" appears on the display (change the display to match the DVM reading; then press "Calibrate" key). "V HI -24.750 V" appears on the display (change the display to match the DVM reading; then press "Calibrate" key). "CAL SETUP 6" now appears on the display (press "Calibrate" key). "I LO 0.100 A" appears on the display (change the display to match the computed current through 0.19 resistor; then press "Calibrate" key). "I HI +0.950 A" appears on the display (change the display to match the computed current through 0.19 resistor; then press "Calibrate" key). Measurement Mode (DVM) Supply being Adjusted +6 supply V V +6 supply +6 supply +6 supply A A +6 supply +6 supply +25 supply V V +25 supply +25 supply +25 supply A A +25 supply +25 supply -25 supply V V -25 supply -25 supply -25 supply A A -25 supply -25 supply 72 Chapter 3 Calibration Procedures Error Messages Error Messages The following tables are abbreviated lists of error messages for the E3631A. The errors listed are the most likely errors to be encountered during calibration and adjustment. A more complete list of error messages and descriptions is contained in chapter 5 of the E3631A User's Guide. System Error Messages Error -330 -350 501 502 511 512 513 514 521 522 550 800 801 Error Message Self-test failed Too many errors Isolator UART framing error Isolator UART overrun error RS-232 framing error RS-232 overrun error RS-232 parity error Command allowed only with RS-232 Input buffer overflow Output buffer overflow Command not allowed in local P25V and N25V coupled by track system P25V and N25V coupled by trigger subsystem 3 Self-Test Error Messages Error 601 602 603 604 605 606 607 608 624 625 626 630 631 632 633 634 Error Message Front panel does not respond RAM read/write failed A/D sync stuck A/D slope convergence failed Cannot calibrate rundown gain Rundown gain out of range Rundown too noisy Serial configuration readback failed Unable to sense line frequency I/O processor does not respond I/O processor failed self-test Fan test failed System DAC test failed P6V hardware test failed P25V hardware test failed N25V hardware test failed 73 Chapter 3 Calibration Procedures Error Messages Calibration Error Messages Error 701 702 703 704 708 711 712 713 740 741 742 743 744 745 746 747 748 Error Message Cal security disabled by jumper Cal secured Invalid secure code Secure code too long Cal output disabled Cal sequence interrupted Bad DAC cal data Bad readback cal data Cal checksum failed, secure state Cal checksum failed, string data Cal checksum failed, store/recall data in location 1 Cal checksum failed, store/recall data in location 2 Cal checksum failed, store/recall data in location 3 Cal checksum failed, DAC cal constants Cal checksum failed, readback cal constants Cal checksum failed, GPIB address Cal checksum failed, internal data 74 Chapter 3 Calibration Procedures Calibration Program Calibration Program This section contains an Agilent BASIC program for calibration over the GPIB interface. This program makes software adjustments to the E3631A power supply using a current shunt and a digital mutimeter which is connected to the controller. In this program a 0.01 ohm current shunt is used. Be sure to change the value of the variable "Current_shunt" to the value of the current shunt used and the GPIB address for the power supply and the digital voltmeter. 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200 210 220 230 240 250 260 270 280 290 300 310 320 330 340 350 360 370 380 390 ! ! ! ! ! ! This program makes software adjustments to the E3631A on the GPIB bus using an Agilent 34401A and a current shunt. In the program a 0.01 ohm current shunt is used to measure current. Be sure to change the value of the variable Current_shunt to the value of the current shunt used. 3 CLEAR SCREEN DIM Cal_msg$[40], Sec_code$[40],Sec_code$[10] REAL Dmm_rdg, Current_shunt Current_shunt=.01 ! Current Shunt value in Ohms Sec_Code$="HP003631" ! Assign the security code. ASSIGN @Dmm TO 722 ! Assign address 22 to the Dmm. ASSIGN @Psup TO 705 ! Assign address 5 to the power supply. CLEAR 7 ! Clear GPIB, Dmm and Power Supply. OUTPUT @Psup;"*CLS" ! Clear power supply errors. OUTPUT @Dmm;"*RST" ! Clear Dmm. OUTPUT @Psup;"*RST" ! Reset power supply. OUTPUT @ Psup;"CAL:STR?" ! Read the calibration message. ENTER @Psup;Cal_msg$ PRINT TABXY(5,2),"Calibration message of Power Supply is: ";Cal_msg$ ! ! Set the Calibration security to off, and check to be sure ! it is off. If not successful, print message to screen and end. ! OUTPUT @Psup;"CAL:SEC:STAT OFF, ";Sec_code$ OUTPUT @Psup;"CAL:SEC:STAT?" ENTER @Psup;A IF A=1 THEN PRINT TABXY(5,5),"****** Unable to Unsecure the Power supply ******" GOTO 1430 END IF ! ! Perform the voltage calibration by stepping through one ! power supply at a time. Alert the operator to hook up the ! connection before calibrating. ! FOR I=1 TO 3 OUTPUT @Psup;"INST:NSEL ";I !Select the output to be calibrated. ! Alert operator to connect lead 75 Chapter 3 Calibration Procedures Calibration Program ...continued 400 410 420 430 440 450 460 470 480 490 500 510 520 530 540 550 560 570 580 590 600 610 620 630 640 650 660 670 680 690 700 710 720 730 740 750 760 770 780 790 800 810 820 830 840 850 860 870 880 890 900 PRINT TABXY(10,10),"*************************************************" PRINT TABXY(10,11)," Using the annunciator, note the output selected." PRINT TABXY(10,12)," Connect the selected output to the DMM. Observe" PRINT TABXY(10,13)," Polarity." PRINT TABXY(10,14),"*************************************************" PRINT TABXY(10,15),"Press C to continue, or E to Exist, then" PRINT TABXY(10,16),"press Enter " Ch$="C" INPUT Ch$ IF Ch$="E" OR Ch$="e" THEN GOTO 1420 OUTPUT @Psup;"OUTP ON" ! Turn on Power supply output. CLEAR SCREEN OUTPUT @Psup;"CAL:VOLT:LEVel MIN" ! Set output to minimum calibration ! value WAIT 1 ! Allow output to settle. OUTPUT @Dmm;"MEAS:VOLT:DC? " ! Measure output with Dmm. ENTER @Dmm;Dmm_rdg ! Sotre in variable Dmm_rdg. PRINT Dmm_rdg OUTPUT @Psup;"CAL:VOLT:DATA ";Dmm_rdg ! Send stored value to power ! supply OUTPUT @Psup;"CAL:VOLT:LEVel MAX" ! Set output to maximum cal value. WAIT 1 ! Allow output to settle. OUTPUT @Dmm;"MEAS:VOLT:DC?" ! Measure output with Dmm. ENTER @Dmm;Dmm_rdg ! Store in variable Dmm_rdg. PRINT Dmm_rdg OUTPUT @Psup;"CAL:VOLT:DATA ";Dmm_rdg ! Send stored value to power ! supply OUTPUT @Psup;"OUTP OFF" OUTPUT @Psup;"SYST:ERR?" ENTER @Psup;Error$ ! ! Check to see if there is an error. If there is an error, ! display the error and exit the program. ! IF Error$="+0,""No error""" THEN PRINT "Voltage calibration complated for Power Supply ";I ELSE PRINT "ERROR:";Error$;" Power Supply ";I;" Voltage not Calibrated" GOTO 1420 END IF NEXT I PRINT TABXY(10,5),"VOLTAGE CALIBRATION COMPLETE" PRINT TABXY(10,7),"BEGIN CURRENT CALIBRATION" ! ! Perform the CURRENT calibration by stepping through one ! power supply at a time. Alert the operator to hook up the ! connection before calibrating. ! FOR I=1 TO 3 OUTPUT @Psup;"INST:NSEL ";I !Select the output to be calibrated. ! Alert operator to connect lead 76 Chapter 3 Calibration Procedures Calibration Program ...continued 910 920 930 940 950 960 970 980 990 1000 1010 1020 1030 1040 1050 1060 1070 1080 1090 1100 1110 1120 1130 1140 1150 1160 1170 1180 1190 1200 1210 1220 1230 1240 1250 1260 1270 1280 1290 1300 1310 1320 1330 1340 1350 1360 1370 1380 1390 1400 1410 1420 1430 PRINT TABXY(10,9),"***************************************************" PRINT TABXY(10,10)," Connect a CURRENT SHUNT to the Dmm for measuring" PRINT TABXY(59,10)," current." PRINT TABXY(10,11)," Using the annunciator, note the output selected." PRINT TABXY(10,12)," Connect the selected output to the shunt. Observe" PRINT TABXY(60,12)," Polarity" PRINT TABXY(10,13),"**************************************************" PRINT TABXY(10,15),"Press C to continue, or E to Exit, then" PRINT TABXY(10,16),"press Enter " Ch$="C" INPUT Ch$ IF Ch$="E" OR Ch$="e" THEN GOTO 1420 OUTPUT @Psup;"OUTP ON" ! Turn on Power supply output. CLEAR SCREEN OUTPUT @Psup;"CAL:CURR:LEVel MIN" ! Set output to minimum cal value. WAIT 1 ! Allow output to settle. OUTPUT @Dmm;"MEAS:VOLT:DC? " ! Measure output with Dmm. ENTER @Dmm;Dmm_rdg ! Store in variable Dmm_rdg. Dmm_rdg=Dmm_rdg/Current_shunt ! Scale reading to amps. IF I=3 THEN DMM_rdg=-DMM_rdg ! For -25V, Current is positive PRINT Dmm_rdg OUTPUT @Psup;"CAL:CURR:DATA ";Dmm_rdg ! Send stored value to power ! supply OUTPUT @Psup;"CAL:CURR:LEVel MAX" ! Set output to maximum cal value. WAIT 1 ! Allow output to settle. OUTPUT @Dmm;"MEAS:VOLT:DC? " ! Measure output with Dmm. ENTER @Dmm;Dmm_rdg ! Store in variable Dmm_rdg. Dmm_rdg=Dmm_rdg/Current_shunt ! Scale reading to amps. IF I=3 THEN DMM_rdg=-DMM_rdg ! For -25V, Current is positive PRINT Dmm_rdg OUTPUT @Psup;"CAL:CURR:DATA ";Dmm_rdg ! Send stored value to power ! supply. OUTPUT @Psup;"OUTP OFF" ! Turn off Power supply output. OUTPUT @Psup;"SYST:ERR?" ENTER @Psup;Error$ ! ! Check to see if there is an error. If there is an error, ! display the error and exit the program. ! IF Error$="+0, No error""" THEN PRINT "Current calibration completed for Power Supply ";I ELSE PRINT "ERROR:";Error$;" Power Supply ";I;" Current not Calibrated" GOTO 1420 END IF NEXT I CLEAR SCREEN PRINT TABXY(10,5),"CURRENT CALIBRATION COMPLETE" ! Create a time stamp and output to power supply Cal_msg$_"Last Calibrated "$DATE$(TIMEDATE)&" "&TIME$(TIMEDATE) OUTPUT @Psup;"CAL:STR """;Cal_msg$;"""" OUTPUT @Psup;"CAL:SEC:STAT ON, ";Sec_code$ END 3 77 Chapter 3 Calibration Procedures Calibration Program 78 4 4 Theory of Operation Theory of Operation This chapter provides block diagram level descriptions of the power supply. The descriptions provide a basic understanding of circuit operation and are intended as an aid in troubleshooting. It is assumed in the following discussions that you are familiar with the operating and programming instructions presented in the E3631A User's Guide. Subjects covered include the following: Block Diagram Overview, page 81 AC Input and Bias Supplies, page 83 Floating Logic, page 84 D-to-A Converter, page 86 A-to-D Converter, page 87 Power Mesh and Control, page 88 Earth-Referenced Logic, page 90 Front Panel, page 90 80 Chapter 4 Theory of Operation Block Diagram Overview Block Diagram Overview This discussion pertains to the block diagram on the next page. The power supply's circuitry is divided into two major blocks: the floating circuitry and the ground referenced circuitry. All power mesh and control circuits, display circuit, and digital circuits are contained in the floating circuitry. This circuitry also contains the power supply's main controller. The ground referenced circuitry provides the interface between the user and the power supply. The floating circuitry can be viewed in four pieces; the DAC system, the digital logic section (floating logic), the power mesh and control section (+6V and 25V power circuits), and the front panel (display and keyboard) section. The floating logic receives digital signals from the earth-referenced logic and the DAC converts them to analog signals which are sent to the power control circuits in order to program the power supply's output voltage and current. The power supply can also be commanded to send measurement and status data back to the remote interface controller and/or the VFD (vacuum fluorescent display) display on the front panel. The data is processed and sent back via the floating logic and earth-referenced logic. The power mesh and control circuits contains voltage and current control circuits which allows the power supply to operate in either the constant voltage (CV) or constant current (CC) mode. The control circuits compare the power supply's output voltage or current with the programmed value and generates a control signal which varies the conduction of the series pass transistor to raise or lower the output as required. The front panel circuits consist of VFD control, display high voltage drivers, and keyboard scanning. Communication between the front panel and floating logic circuits is accomplished through a 4-wire bi-directional serial interface. The ground referenced circuitry uses a controller configured as a slave to the main controller. This controller establishes external I/O communication with the main controller through a bi-directional, optically isolated, serial communications link. The earth referenced controller controls low-level GPIB (IEEE-488) and RS-232 interface operation. Separate reference and bias supplies are provided for the floating and ground reference circuitry. The front panel operates from the floating circuitry with its logic common different from the main controller logic common. 4 81 Chapter 4 Theory of Operation Block Diagram Overview Block Diagram FLOATING CIRCUITRY EARTH REFERENCED CIRCUITRY 82 Chapter 4 Theory of Operation AC Input and Bias Supplies AC Input and Bias Supplies Referring to the schematic shown on page 127, the ac mains are connected by a fused power module. This module incorporates the functions of mains connection, fusing, and line voltage selection (100/115/230 Vac). The line voltage selection function of the module selects which primary winding of power transformer T1 is energized. The transformer secondary windings are connected to the main pc board through connectors. The bias supplies are consists of four sections; 15 Vdc for the +6V power circuits; 15 Vdc, +5 Vdc and -5.1 Vdc for the 25V power circuits and floating logic; 16.4 Vdc for the display; and +5 Vdc for the earth referenced logic. Power-on reset signals are provided by the +5 Vdc supply of the floating logic. The 15 Vdc for the +6V power circuits are produced by rectifiers CR15 and CR16, filter capacitors C43 and C44, and voltage regulators U24 and U25 on the bottom board. These supplies provide bias voltages for the +6V power circuits. The 16.4 Vdc for the display circuits are produced by rectifier CR20, filter capacitors C44 and C45, and voltage regulators U24 and U25 on the top board. A separate winding of T1 provides a center tapped 6 Vrms filament supply for the display. The 15 Vdc for the 25V power circuits are derived from 16.4 Vdc by diodes CR15 through CR18 on the top board. These supplies provide bias voltages for the 25V power circuits. The floating +5 Vdc and -5.1 Vdc supplies are produced from 16.4 Vdc supplies. VR2 on the top board forms a clamp circuit to provide over voltage protection in the event of a regulator failure. The ADC REF signal is derived from +15 Vdc supply and the TURN_ON RESET signal is derived from +5 Vdc supply. The FAN FAIL signal is asserted when the fan current through R73 on the top board is not detected. The TURN_ON RESET signal holds the main controller and other logic in a reset state until after the +5 Vdc logic power is fully operational. This signal is generally active only following application of line power to the instrument. The +5V dc earth referenced supply is produced by rectifier CR3, filter capacitor C15, and regulator U11 on the bottom board. The GPIB (IEEE-488) and RS-232 computer interfaces are powered from this supply. 4 83 Chapter 4 Theory of Operation Floating Logic Floating Logic Referring to the schematic shown on page 128, the floating common logic controls operation of the entire instrument. All output functions and bus command interpretation is performed in the main controller U17. The front panel and the earth referenced logic operate as slaves to U17. The floating common logic is comprised of the main controller U17, custom gate array U16, the program ROM U14, RAM U15, calibration EEPROM U18, and the 12 MHz clock oscillator Y1 on the top board . Non-volatile EEPROM U18 stores calibration constants, calibration secure code, and calibration count. Poweron reset is provided to the main controller by the voltage regulator U1 on the top board. The main controller U17 is a 16-bit micro controller. It controls such features as receive and transmit serial port, timer/counter ports, an 8-bit pulse width modulated DAC port, and selectable input 10-bit successive approximation ato-d convert ports. A conventional address/data bus is used to transfer data between the main controller and external ROM and RAM. When the address latch enable (ALE) signal goes high, address data is present on the address/ data bus. ASIC U16 latches the address data and decodes the correct chip enable (low true) for external ROM and RAM accesses and for read/write accesses to the internal registers of U16. The system memory map is shown below. 0000H - 1FF7H 1FF8H - 1FFFH 2000H - FFFFH U15 8k x 8 RAM U16 Gate Array U14 Program ROM Program ROM U14 contains four 64k x 8 data banks of data. Banks are selected by controlling A16 and A17 ROM address bits directly from the main controller port bits. Custom gate array U16 performs address latching and memory map decoding functions as discussed above. In addition, U16 contains a variety of internal read/write registers. The read (XRD) and write (XWR) signals transfer data out of and into U16 when it is addressed. There are four internal registers in U16: an internal configuration register, an 8 bit counter register, a serial transmit/ receive register, and an internal status register. The counter register is used to capture the ADC slope count at the COMP input. The COMP input functions as both a clocked comparator and the slope counter input for the ADC. In both cases the counter register captures the lower 8 bits of a 24-bit counter. The upper 16 bits of the count are captured by the SYNC input to U17. 84 Chapter 4 Theory of Operation Floating Logic The serial register is used to send and receive serial data bytes from the main controller to the DAC system, or to communicate with the front panel controller. The serial register is multiplexed to these two circuits. The transmission rate is selected to 1.5 M bits/second for the DAC system and 93.75 k bits/second for communication with the front panel controller. The general serial interface is a 3-bit interface as shown below. U18 Internal Signal Serial Clock Data OUT (send) Data IN (receive) Configuration Signals SERCK SERDAT SERRBK Front Panel Signals XFPSK FPDI FPDO Serial data is received simultaneously as serial data is clocked out. Front panel data is exchanged in both directions whenever a byte is sent from U16 on the top board. The input data of DAC is strobed to outputs by U17 signal SERSTB. Interrupts from the front panel are detected by U16 and signaled to the CHINT. The main controller FPINT signals the front panel controller that U16 has data to send. The power supply's calibration correction data are stored in a 128 x 16 bit nonvolatile electrically erasable ROM U18 on the top board. This non-volatile ROM read/write data is accessed by a 4-bit serial protocol controlled by U17. The main controller has an on-chip 10-bit successive approximation ADC. The FLASH input is used to sample the residual charge on the main integrating ADC output of U8 on the top board. Port bits are also configured to measure the input power line frequency (LSENSE). Frequencies from 55 Hz to 66 Hz are measured as 60 Hz. All other line input frequencies are assumed to be 50 Hz. The main controller communicates with the earth referenced controller U10 on the bottom board through an optically isolated (U1 and U2 on the bottom board) asynchronous serial link. Data is sent in an 11-bit frame at a rate of 187.5 k bits/ second. When the RS-232 interface is selected, data is sent across the isolated link at 93.75 k bits/second. The 11-bit data frame is configured for one start bit, eight data bits, one control bit, and one stop bit. 4 85 Chapter 4 Theory of Operation D-to-A Converter D-to-A Converter Referring to the schematic shown on page 129, all reference voltages of power circuits are derived from the internal voltage reference of system DAC U12 on the top board. The system DAC track/hold amplifier outputs are used to provide controllable reference voltages to three power circuits. The system DAC is programmed and responds to the main controller via internal 3-wire serial data bus SERCLK, SERRBK, and SERSTB. The system DAC is mutiplexed to 6 track/hold amplifiers through U13 on the top board. Each track/hold amplifier is refreshed approximately every 13 msec to maintain its output setting. Changes to track/hold amplifier outputs are accomplished by dwelling on that position for an extended period. 86 Chapter 4 Theory of Operation A-to-D Converter A-to-D Converter Referring to the schematic shown on page 129, the analog-to-digital converter (ADC) is used to change dc voltages into digital information. The circuitry consists of an integrator amplifier (U6 and U8), current steering switch U5, resistors (R5, R4, R15 and R16), voltage reference (U3A and U3B), ADC controller U16, and residue ADC U17 on the top board. The ADC method used by the Agilent E3631A is called multislope III. Multislope III is a charge balancing continuously integrating analog-to-digital converter. The input voltage continuously forces charge onto the integrator capacitors C18 and C19 through R15 on the top board. Switch U5 steers fixed positive or negative reference currents onto the integrator capacitors to cancel, or balance the accumulated input charge. The level shifted (R19 and R20 on the top board) output of the integrator is checked every 2.66 mA by the U16 COMP input. Logic state machines in U16 control the U5 current steering to continuously seek an approximate 2.5 V level on the integrator amplifier output, FLASH. If the ADC input voltage ADC REF is between 15 V, the integrator output (FLASH) will remain within the 0 V to 5 V range of the U17 on-chip ADC. An input greater than +15 V may cause the integrator output in U8 at pin 6 (U8-6) to saturate at about -15 V. An input less than -15 V may cause U8 to saturate with an output of about +15 V. The U17 ADC input (FLASH) is clamped to 0 V or 5 V by R21 and CR3 to protect U17. The integrator amplifier is formed by U6 and U8. Resistors R10 and R11 affect the amplifier stability. Amplifier oscillation may occur if their values are incorrect. Amplifier U6 improves the offset voltage characteristics of integrator amplifier U8 on the top board. Each analog-to-digital conversion occurs continuously. The ADC starts by clearing the integrator slope count in U16. At the end of the integration period, the slope count is latched. The slope count provides the most significant bits of the input voltage conversion. The least significant bits are converted by the on-chip ADC of U17. 4 87 Chapter 4 Theory of Operation Power Mesh and Control Power Mesh and Control Refer to the schematics shown on page 130 and page 131. For the 25V power mesh and control circuit, a preregulator is added ahead of the series pass transistor to minimize the power dissipated in the series pass transistor by controlling the dc level across the input filter capacitor, depending on the output voltage. To achieve this, tap switching is accomplished by a TRIAC and one bridge diode and the TRIAC control circuit in each power circuit; Q10 and CR29 on the top board for +25V power circuit, Q3 and CR7 on the top board for -25V power circuit. By turning on or off the TRIAC, these circuits allow the input capacitors (C54, C55, and C56 for +25V power circuit and C34, C35, and C36 for -25V power circuit) to charge to one of two discrete voltage levels, depending on the output voltage required. When the TRIAC is not fired, the bridge diode conducts and the low voltage of two discrete voltage levels is developed across the input filter capacitors. The TRIAC control circuit determines whether TRIAC is to be fired by monitoring the output voltage and comparing this value against internally derived reference levels. The series pass transistor is part of a feedback loop which consists of the driver and the Constant Voltage/Constant Current error amplifier. The feedback loop provides "fine and fast" regulation of the output while the preregulator feedback loop handles large, relatively slow, regulation demands. The series pass transistor is made to alter its conduction to maintain a constant output voltage or current. The voltage developed across the current sampling resistors is the input to the constant current error amplifier. The constant voltage error amplifier obtains its input by sampling the output voltage of the supply. Any changes in output voltage or current are detected and amplified by the constant voltage or constant current error circuit and applied to the series pass transistor in the correct phase and amplitude to counteract the change in output voltage or current. 88 Chapter 4 Theory of Operation Power Mesh and Control Two error amplifiers are included in a CV/CC supply, one for controlling output voltage, the other for controlling output current. Since the constant voltage amplifier tends to achieve zero output impedance and alters the output current whenever the load resistance changes, while the constant current amplifier causes the output impedance to be infinite and changes the output voltage in response to any load resistance change, it is obvious that the two amplifiers can not operate simultaneously. For any given value of load resistance, the power supply must act either as a constant voltage source or as a constant current source - it can not be both; transfer between these two modes is accomplished at a value of load resistance equal to the ratio of the output voltage control setting to the output current control setting. Full protection against any overload condition is inherent in the Constant Voltage/Constant Current design principle since there is not any load condition that can cause an output which lies outside the operating region. For either constant voltage or constant current operation, the proper choice of front panel voltage and current limit settings insures optimum protection for the load device as well as full protection for the power supply. The diodes connected across the output terminals in reverse polarity protect the output electrolytic capacitor and the series pass transistors from the effects of a reverse voltage applied across the output terminals. The +6V power mesh and control circuits are similar to those of the 25V power circuits except that the the TRIAC preregulator is not used. The ac input, after passing through power transformer, is rectified and filtered. By feedback action, the series pass transistor alters its conduction to keep the regulated dc output voltage constant. The +6V and the 25V power mesh and control circuits are isolated from each other and the two outputs of the 25V power mesh and control circuit share a common output terminal. 4 89 Chapter 4 Theory of Operation Earth-Referenced Logic Earth-Referenced Logic Referring to the schematic shown on page 132, the earth referenced logic circuits schematic provides all rear panel input/output capability. Microprocessor U10 on the bottom board handles GPIB (IEEE-488) control through bus interface chip U8 and bus receiver/driver chips U6 and U7 on the bottom board. The RS-232 interface is also controlled through microprocessor U10. RS-232 transceiver chip U12 on the bottom board provides the required level shifting to approximate 9 volt logic levels through on-chip charge-pump power supplies using C11 and C12 on the bottom board. Communication between the earth referenced logic interface circuits and the floating logic is accomplished through an optically-isolated bi-directional serial interface. Isolator U2 on the bottom board couples data from U10 to processor U17 on the top board. Isolator U1 on the bottom board couples data from U17 on the top board to microprocessor U10 on the bottom board. Front Panel Referring to the schematic shown on page 133, the front panel circuits consist of vacuum fluorescent display control, display high voltage drivers, and keyboard scanning. Communication between the front panel and floating logic circuits is accomplished through a 4-wire bi-directional serial interface. The main controller U17 can cause a hardware reset to front-panel controller by signal IGFPRES. The front panel logic operates from -11.4 volts (logic 1) and 16.4 volts (logic 0). The front panel logic high supply (-11.4 volts) is produced by the -16.4 volts bias supply and the voltage regulator U2 on the front panel board. The four serial communication signals are level shifted by the comparator U8 from the floating logic 0 V to 5 V levels to the -16.4 V to -11.4 V levels present on the front panel assembly. U6 acts as the serial shift register interface for the front-panel controller U7 on the front panel board. Display anode and grid voltages are +16.4 volts for an "on" segment and -16.4 volts for an "off" segment. The -10.2 V cathode bias for the display is provided by filament winding center tap bias circuit VR3, R43, and C32 on the top board. Keyboard scanning is accomplished through a conventional scanned rowcolumn key matrix. Keys are scanned by outputing data at front-panel controller U7 port pins P0.0 through P0.3 to poll each key column for a key press. Column read-back data are read by the microprocessor at port pins P1.0 through P1.3 for decoding and communication to the floating logic circuits. 90 5 5 Service Service This chapter discusses the procedures involved for returning a failed power supply to Agilent Technologies for service or repair. Subjects covered include the following: Operating Checklist, page 93 Types of Service Available, page 94 Repacking for Shipment, page 95 Electrostatic Discharge (ESD) Precautions, page 96 Surface Mount Repair, page 96 To Replace the Power-Line Fuse, page 96 Troubleshooting Hints, page 97 Self-Test Procedures, page 99 92 Chapter 5 Service Operating Checklist Operating Checklist Before returning your power supply to Agilent Technologies for service or repair check the following items: Is the Power Supply Inoperative? Verify that the ac power cord is connected to the power supply. Verify that the front-panel power switch is depressed. Verify that the power-line fuse is installed: Use the 2.5 AT, 250 V fuse for 100 or 115 Vac operation. Use the 2 AT, 250 V fuse for 230 Vac operation. Verify the power-line voltage setting. See "To prepare the power supply for use" page 23. Does the Power Supply Fail Self-Test? Verify that the correct power-line voltage is selected. See "To prepare the power supply for use" page 23. Remove all load connections to the power supply. Ensure that all terminal connections are removed while the self-test is performed. 5 93 Chapter 5 Service Types of Service Available Types of Service Available If your power supply fails within three years of original purchase, Agilent Technologies will repair or replace it free of charge. If your unit fails after your three year warranty expires, Agilent will repair or replace it as a very competitive price. Agilent will make the decision locally whether to repair or replace your unit. Standard Repair Service (worldwide) Contact your nearest Agilent Technologies Service Center. They will arrange to have your power supply repaired or replaced. Express Exchange (U.S.A. only) You can receive a replacement Agilent E3631A via overnight shipment for low downtime. 1 Call 1-800-258-5165 and ask for "Express Exchange." You will be asked for your shipping address and a credit card number to guarantee return of your failed power supply. If you do not return your failed power supply within 45 days, your credit card will be billed for a new Agilent E3631A. If you choose not to supply a credit card number, you will be asked to send your failed unit to a designated Agilent Service Center. After the failed unit is received, Agilent will send your replacement unit. 2 Agilent Technologies will immediately send a replacement Agilent E3631A to you via overnight shipment. The replacement unit will have a different serial number than your failed unit. If you can not accept a new serial number for the replacement unit, use the Standard Repair Service option described above. If your failed unit was "in-warranty,'' your replacement unit continues the original three year warranty period. You will not be billed for the replacement unit as long as the failed unit is received by Agilent Technologies. If your three year warranty has expired, Agilent will bill you for the Agilent E3631A exchange price - less than a new unit price. Agilent warrants exchange units against defects for 90 days. 94 Chapter 5 Service Repacking for Shipment Repacking for Shipment For the Express Exchange Service described on the previous page, return your failed Agilent E3631A to the designated Agilent Service Center using the shipping carton of the exchange unit. A shipping label will be supplied. Agilent will notify you when your failed unit has been received. If the instrument is to be shipped to Agilent Technologies for service or repair, be sure to: Attach a tag to the power supply identifying the owner and indicating the required service or repair. Include the instrument model number and full serial number. Place the power supply in its original container with appropriate packaging material. Secure the container with strong tape or metal bands. If the original shipping container is not available, place your unit in a container which will ensure at least 4 inches of compressible packaging material around all sides for the power supply. Use static-free packaging materials to avoid additional damage to your unit. Agilent Technologies suggests that you always insure shipments. 5 95 Chapter 5 Service Electrostatic Discharge (ESD) Precautions Electrostatic Discharge (ESD) Precautions Almost all electrical components can be damaged by electrostatic discharge (ESD) during handling. Component damage can occur at electrostatic discharge voltages as low as 50 volts. The following guidelines will help prevent ESD damage when serving the power supply or any electronic device. Disassemble instruments only in a static-free work area. Use a conductive work area to dissipate static charge. Use a conductive wrist strap to dissipate static charge accumulation. Minimize handling. Keep replacement parts in original static-free packaging. Remove all plastic, styrofoam, vinyl, paper, and other static-generating materials from the immediate work area. Use only anti-static solder suckers. Surface Mount Repair Surface mount components should only be removed using soldering irons or disordering stations expressly designed for surface mount components. Use of conventional solder removal equipment will almost always result in permanent damage to the printed circuit board and will void your Agilent Technologies factory warranty. To Replace the Power-Line Fuse The power-line fuse is located within the power supply's fuse-holder assembly on the rear panel (see page 24). For 100 or 115 Vac operation, you must use a 2.5 AT slow-blow fuse (Agilent part number 2110-0913). For 230 Vac operation, you must use a 2 AT slow-blow fuse (Agilent part number 2110-0587). 96 Chapter 5 Service Troubleshooting Hints Troubleshooting Hints This section provides a brief check list of common failures. Before troubleshooting or repairing the power supply, make sure that the failure is in the instrument rather than any external connections. Also make sure that the instrument is accurately calibrated. The power supply's circuits allow troubleshooting and repair with basic equipment such as a digit multimeter and a 100 MHz oscilloscope. Unit is Inoperative Verify that the ac power cord is connected to the power supply. Verify that the front-panel power switch is depressed. Verify that the power-line fuse is installed: Use the 2.5 AT, 250 V fuse for 100 or 115 Vac operation.. Use the 2 AT, 250 V fuse for 230 Vac operation.. Verify the power-line voltage setting. See "To prepare the power supply for use" page 23. Unit Reports Errors 740 to 748 These errors may be produced if you accidentally turn off power the unit during a calibration or while changing a non-volatile state of the instrument. Recalibration or resetting the state should clear the error. If the error persists, a hardware failure may have occurred. 5 Unit Fails Self-Test Verify that the correct power-line voltage setting is selected. Also, ensure that all terminal connections are removed while the self-test is performed. Failure of the DAC U12 on the top board will cause many self-test failures. 97 Chapter 5 Service Troubleshooting Hints Bias Supplies Problems Check that the input to the voltage regulators of the bias supplies is at least 1 V greater than their output. Circuit failures can cause heavy loads of the bias supplies which may pull down the regulator output voltages. Check the voltages of bias supplies as tabulated below. Table 5-1. Bias Supplies Voltages Bias Supply +5V Floating -5.1V Floating +15V Floating ( 25V supplies) -15V Floating ( 25V supplies) +15 Floating (+6V supplies) -15 Floating (+6V supplies) +5V Ground Ref. Minimum 4.75 V -4.75 V 14.25 V -14.25 V 14.25 V -14.25 V 4.75 V Maximum 5.25 V -5.25 V 15.75 V -15.75 V 15.75 V -15.75 5.25 V Check At U1 pin 2 (on the top Board) Anode of VR4 (on the top Board) Cathode of CR16 (on the top Board) Anode of CR18 (on the top Board) U25 pin 2 (on the bottom Board) U24 pin 3 (on the bottom Board) U11 pin 3 (on the bottom Board) Some circuits produce their own local bias supplies from the main bias supplies. Be sure to check that these local bias supplies are active. In particular, the ADC (analog-to-digital converter), ac input, and front panel sections have local bias supplies. Always check that the power supplies are free of ac oscillations using an oscilloscope. Failure of bias supplies will cause many selftest failures. 98 Chapter 5 Service Self-Test Procedures Self-Test Procedures Power-On Self-Test Each time the power supply is powered on, a set of self-tests are performed. These tests check that the minimum set of logic and measurement hardware are functioning properly. The power-on self-test performs checks 601 through 604 and 624 through 634. Complete Self-Test Hold any front panel key except the "Error'' key for more than 5 seconds while turning on the power to perform a complete self-test. The power supply beeps when the test starts. The tests are performed in the order shown below. 601 Front Panel Does not respond The main controller U17 on the top board attempts to establish serial communications with the front panel controller U7 on the front panel board. During this test, U7 turns on all display segments. Communication must function in both directions for this test to pass. If this error is detected during power-on self-test, the power supply will beep twice. This error is only readable from the remote interface. RAM read/write failed This test writes and reads a 55h and AAh checker board pattern to each address of ram U15 on the top board. Any incorrect readback will cause a test failure. This error is only readable from the remote interface. A/D sync stuck The main controller issues an A/D sync pulse to U17 and U16 on the top board to latch the value in the ADC slope counters. A failure is detected when a sync interrupt is not recognized and subsequent time-out occurs. A/D slope convergence failed The input amplifier is configured to the measure zero (MZ) state in the 10 V range. This test checks whether the ADC integrator produces nominally the same number of positive and negative slope decisions ( 10%) during a 20 ms interval. 602 5 603 604 99 Chapter 5 Service Self-Test Procedures 605 Cannot calibrate rundown gain This test checks the nominal gain between integrating ADC and the U17 on-chip ADC. This error is reported if the procedure can not run to completion due to a hardware failure. Rundown gain out of range This test checks the nominal gain between the integrating ADC and the U17 on-chip ADC. The nominal gain is checked to 10% tolerance. Rundown too noisy This test checks the gain repeatability between the integrating ADC and the U17 on-chip ADC. The gain test (606) is performed eight times. Gain noise must be less that 64 lsb's of the U17 on-chip ADC. Serial configuration readback failed This test re-sends the last 3 byte serial configuration data to all the serial path (SERDAT, SERBCK, SERCLK). The data is then clocked back into U16 on the top board and compared against the original 3 bytes sent. A failure occurs if the data do not match. This tests checks the serial data path through U11 on the top board. Unable to sense line frequency This test checks that the LSENCE logic input U17 on the top board is togging. If no logic input detected, the power supply will assume a 50 Hz line operation for all future measurements. I/O processor did not respond This test checks that communications can be established between U16 on the top board and U10 on the bottom board through the optically isolated (U1 and U2 on the bottom board) serial data link. Failure to establish communication in either direction will generate an error. If this condition is detected at power-on self-test, the power supply will beep and the error annunciator will be on. I/O processor failed self-test This test causes the earth referenced processor U10 on the bottom board to execute an internal, ram test. Failure will generate an error. Fan test failed This test checks if the fan current is flowing. If the current is not detected at power-on self-test, the power supply will beep and the error annunciator will be on. System DAC test failed This test checks if the DAC hardware is functional. The main controller U17 sends a reference voltage data to DAC and converts the DAC output to digital data to see if the digital data is within a valid range. 606 607 608 624 625 626 630 631 100 Chapter 5 Service Self-Test Procedures 632 P6V hardware test failed This test checks the the status of voltage and current error amplifiers for +6V power circuit. If both amplifiers are not operational, the power supply will beep and the error annunciator will be on. P25V hardware test failed This test checks the the status of voltage and current error amplifiers for +25V power circuit. If both amplifiers are not operational, the power supply will beep and the error annunciator will be on. N25V hardware test failed This test checks the the status of voltage and current error amplifiers for -25V power circuit. If both amplifiers are not operational, the power supply will beep and the error annunciator will be on. 633 634 5 101 Chapter 5 Service Self-Test Procedures 102 6 6 Replaceable Parts Replaceable Parts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o Order Replaceable Parts <RX FDQ RUGHU UHSODFHDEOH SDUWV IURP $JLOHQW XVLQJ WKH $JLOHQW SDUW QXPEHU RU GLUHFWO\ IURP WKH PDQXIDFWXUHU XVLQJ WKH PDQXIDFWXUHU V SDUW QXPEHU 7R RUGHU UHSODFHDEOH SDUWV IURP $JLOHQW GR WKH IROORZLQJ 1 &RQWDFW \RXU QHDUHVW $JLOHQW 6DOHV 2IILFH RU $JLOHQW 6HUYLFH &HQWHU 2 ,GHQWLI\ WKH SDUWV E\ WKH $JLOHQW SDUW QXPEHU VKRZQ LQ WKH UHSODFHDEOH SDUWV OLVW 3 3URYLGH WKH LQVWUXPHQW PRGHO QXPEHU DQG VHULDO QXPEHU Backdating and Part Changes $OZD\V UHIHU WR FKDSWHU %DFNGDWLQJ EHIRUH DWWHPSWLQJ UHSDLU RU EHIRUH RUGHULQJ UHSODFHPHQW SDUWV 3DUWV FKDQJHV DUH GRFXPHQWHG LQ WKH EDFNGDWLQJ FKDSWHU 104 Chapter 6 Replaceable Parts E3631-60002 Top PCB Assembly E3631-60002 Top PCB Assembly Reference Designator C1-C2 C3 C4-C5 C6-C7 C8-C9 C10-C15 C16 C18-C19 C20-C25 C26 C27-C31 C32 C33 C34-C36 C37 C38-C39 C40 C41 C44-C45 C46-C47 C48 C49-C50 C51-C52 C53 C54-C56 C57 C58-C59 C60-C65 C66 C67-C68 C69 C70-C71 C72 C73-C74 C75-C78 Agilent Part Number 0160-6497 0180-4116 0160-6497 0160-6736 0160-6497 0160-5892 0160-6497 0160-5954 0160-6497 0180-3643 0160-6497 0180-4116 0160-6736 0180-3657 0160-6497 0160-6104 0160-6736 0160-6225 0180-2980 0180-3751 0160-6225 0160-6940 0160-6104 0160-6736 0180-3657 0160-6497 0160-6225 0160-6497 0160-5967 0160-4535 0160-5967 0160-5947 0160-5892 0160-7221 0160-4832 2 4 2 2 2 4 2 2 4 6 1 2 8 5 Qty 26 2 Description CAP-FXD 0.1uF+-10% 50V CER X7R CAP-FXD 22uF +-20% 20V TA CAP-FXD 0.1uF+-10% 50V CER X7R CAP-FXD 0.01uF +-10% 50V CER X7R CAP-FXD 0.1uF+-10% 50V CER X7R CAP-FXD 0.22uF +-10% 63V POLYE-MET CAP-FXD 0.1uF+-10% 50V CER X7R CAP-FXD 220pF +-10% 50V CER COG CAP-FXD 0.1uF+-10% 50V CER X7R CAP-FXD 470uF +-20% 25V AL-ELCTLT CAP-FXD 0.1uF+-10% 50V CER X7R CAP-FXD 22uF +-20% 20V TA CAP-FXD 0.01uF +-10% 50V CER X7R CAP-FXD 1000uF +-20% 63V AL-ELCTLT CAP-FXD 0.1uF+-10% 50V CER X7R CAP-FXD 2200pF +-5% 50V CER COG CAP-FXD 0.01uF +-10% 50V CER X7R CAP 0.33UF +-10% 250V POLYE-MET CAP-FXD 1000uF +-20% 50V AL-ELCTLT CAP-FXD 1uF +-20% 35V TA CAP 0.33UF +-10% 250V POLYE-MET CAP-FXD 0.33uF +-20% 50V CER Z5U CAP-FXD 2200pF +-5% 50V CER COG CAP-FXD 0.01uF +-10% 50V CER X7R CAP-FXD 1000uF +-20% 63V AL-ELCTLT CAP-FXD 0.1uF+-10% 50V CER X7R CAP 0.33UF +-10% 250V POLYE-MET CAP-FXD 0.1uF+-10% 50V CER X7R CAP-FXD 100pF +-5% 50V CER COG CAP-FXD 1uF +-10% 50V CER X7R CAP-FXD 100pF +-5% 50V CER COG CAP-FXD 1000pF +-10% 50V CER X7R CAP-FXD 0.22uF +-10% 63V POLYE-MET CAP-FXD 0.1uF +-10% 50V CER X7R CAP-FXD 0.01uF +-10% 100V CER X7R Mfr Code 04222 12340 04222 12340 04222 05524 04222 04222 04222 S4217 04222 12340 12340 S4217 04222 12340 12340 06127 S4217 12340 06127 04222 12340 12340 S4217 04222 06127 04222 12340 12340 12340 04222 05524 02010 02010 Mfr Part Number 12065C104KAT A T491D226M020AS 12065C104KAT A C1206C103K5RAC 12065C104KAT A MKT1817422065 12065C104KAT A 08051A221JAT A 12065C104KAT A SME25VB471M10X16LL 12065C104KAT A T491D226M020AS C1206C103K5RAC KME63VB102M16X31LL 12065C104KAT A C1206C222J5GAC C1206C103K5RAC MKS4-.33/250/10 SME50VB102M16X25LL T491B105M035AS MKS4-.33/250/10 12105E334MAT A C1206C222J5GAC C1206C103K5RAC KME63VB102M16X31LL 6 12065C104KAT A MKS4-.33/250/10 12065C104KAT A C0805C101J5GAC C330C105K5R5CA C0805C101J5GAC 08055C102KATA MKT1817422065 SA115C104KAAH SA101C103KAAH 105 Chapter 6 Replaceable Parts E3631-60002 Top PCB Assembly Reference Designator CR1-CR3 CR4-CR6 CR7 CR8-CR10 CR11-CR12 CR13-CR14 CR15-CR19 CR20 CR21 CR22-CR23 CR24 CR25-CR26 CR28 CR29 CR30-CR31 CR32-CR37 VR1-VR3 VR4 VR5 VR6 J1 J2 J3-J4 J5 J6 J7 J8 Q1 Q2 Q3 Q4 Q5 Q6 Q7 Q8 Q9 Q10 E1-E5 Agilent Part Number 1906-0291 1901-1149 1906-0351 1906-0291 1901-1227 1901-1165 1901-1149 1906-0407 1901-1149 1906-0291 1901-1227 1906-0291 1901-1227 1906-0351 1901-1149 1901-1227 1902-1542 1902-0579 1902-0651 1902-3002 1252-6880 1251-5066 1252-7162 1252-6914 1251-8363 1252-7453 1251-8363 1854-1233 1853-0590 1854-1320 1854-1053 1853-0525 1854-1053 1853-0709 1854-0039 1854-1053 1854-1320 9170-1431 Qty 10 13 2 11 2 1 Description DIODE-DUAL 70V 100mA TO-236 AA DIODE-PWR RECT 400V 1A 50NS DO-41 DIODE-FW BRDG 200V 2A DIODE-DUAL 70V 100mA TO-236 AA DIODE-SWICHING 75V 200mA 6nS TO-236 DIODE-SHOTTKY 60V 1A DO-41 DIODE-PWR RECT 400V 1A 50NS DO-41 DIODE-FW BRDG 400V 1A DIODE-PWR RECT 400V 1A 50NS DO-41 DIODE-DUAL 70V 100mA TO-236 AA DIODE-SWICHING 75V 200mA 6nS TO-236 DIODE-DUAL 70V 100mA TO-236 AA DIODE-SWICHING 75V 200mA 6nS TO-236 DIODE-FW BRDG 200V 2A DIODE-PWR RECT 400V 1A 50NS DO-41 DIODE-SWICHING 75V 200mA 6nS TO-236 Mfr Code 28480 71744 71744 28480 27014 71744 71744 71744 71744 28480 27014 28480 27014 71744 71744 27014 04713 04713 04713 04713 27264 27264 27264 27264 27264 27264 27264 04713 04713 50080 04713 04713 04713 04713 04713 04713 50080 06352 Mfr Part Number 1906-0291 UF4004 2KBP02M 1906-0291 BAS16 SB160 UF4004 DF04S UF4004 1906-0291 BAS16 1906-0291 BAS16 2KBP02M UF4004 BAS16 BZX84C6V2 1N4733ARL 1N4739A SZ30016-2 22-03-5085 5045-02A 1252-7162 09-65-2068 09-65-2038 09-65-2085 09-65-2038 TIP35C 2N4036 BTA06-600B MMBT2222ALT1 MMBT2907A MMBT2222ALT1 TIP36C 2N3053S MMBT2222ALT1 BTA06-600B HF50ACB-453215 3 1 1 1 1 1 1 2 DIODE-ZNR 6.2V 5% TO-236(SOT-23) DIODE-ZNR 5.1V 5% PD=1W IR=10uA DIODE-ZNR 9.1V 5% PD=1W IR=10uA DIODE-ZNR 2.37V 5% DO-7 PD=.4W TC=.074% CONN-POST-TYPE HDR 8P CONN-POST TYPE.098-PIN-SPCG-MTG-EN CONNECTOR-TIN-PLATED 12-PIN CONN-POST TYPE.156-PIN-SPCG-MTG-EN CONN-POST TYPE.156-PIN-SPCG-MTG-EN CONN-POST-TYPE PST CONN-POST TYPE.156-PIN-SPCG-MTG-EN 1 1 2 3 1 1 1 TRANSISTOR NPN SI TO-218AC PD=125W TRANSISTOR 2N4036 SI TO-5 PD=1W THYRISTOR-TRIAC TO-220AB VRRM=600 TRANSISTOR NPN SI SOT-23(TO-236AB) TRANSISTOR PNP SI TO-236AA PD=200mW TRANSISTOR NPN SI SOT-23(TO-236AB) TRANSISTOR PNP SI TO-218AC PD=125W TRANSISTOR NPN 2N3053A SI TO-39 PD=1W TRANSISTOR NPN SI SOT-23(TO-236AB) THYRISTOR-TRIAC TO-220AB VRRM=600 5 CORE-SHIELDING BEAD 106 Chapter 6 Replaceable Parts E3631-60002 Top PCB Assembly Reference Designator F1-F2 R1 R2-R3 R4-R5 R6-R8 R9 R10 R11-R12 R13 R14 R15 R16 R17 R18 R19 R20 R21 R22-R27 R28 R29-R33 R34 R36-R39 R40 R41-R42 R43-R45 R46 R47 R48 R49 R50 R51 R53 R54 R55 R56 R57 R58 R59 Agilent Part Number 0699-2715 0699-1405 0699-1385 0699-2837 0699-2489 0699-2491 0699-1318 0699-1389 0699-1391 0699-1348 0699-2222 0699-1405 0699-4278 0699-2837 0699-2506 0699-1330 0699-1380 0699-1423 0699-1344 0699-1318 0699-1330 0699-1423 0699-1386 0699-1423 0699-1391 0811-2188 0699-1357 0699-1386 0699-1391 0699-1405 0699-1318 0699-1396 0699-3590 0699-1332 0699-2822 0699-1423 0699-1318 0699-1391 Qty 2 4 2 2 3 1 11 2 10 1 1 1 1 1 2 7 16 1 Description RESISTOR-FUSE 1 OHM +-5% 0.5W @70 RESISTOR 38.3K +-1% .125W TKF TC=0+-100 RESISTOR 5.11K +-1% .125W TKF TC=0+-100 RESISTOR 30K +-0.1% .125W TF TC=0+-25 RESISTOR 10K +-0.1% .125W TF TC=0+-25 RESISTOR 20K +-0.1% .125W TF TC=0+-25 RESISTOR 1K +-1% .125W TKF TC=0+-100 RESISTOR 8.25K +-1% .125W TKF TC=0+-100 RESISTOR 10K +-1% .125W TKF TC=0+-100 RESISTOR 14.7 +-1% .125W TKF TC=0+-100 RESISTOR 100K +-.5% .125W TKF TC=0+-25 RESISTOR 38.3K +-1% .125W TKF TC=0+-100 RESISTOR 7.15K +-0.1% .125W TF TC=0+-25 RESISTOR 30K +-0.1% .125W TF TC=0+-25 RESISTOR 7.15K +-1% .125W TKF TC=0+-100 RESISTOR 100K +-1% .125W TKF TC=0+-100 RESISTOR 3.16K +-1% .125 TKF TC=0+-100 RESISTOR 215 +-1% .125W TKF TC=0+-100 RESISTOR 10 +-1% .125W TKF TC=0+-100 RESISTOR 1K +-1% .125W TKF TC=0+-100 RESISTOR 100K +-1% .125W TKF TC=0+-100 RESISTOR 215 +-1% .125W TKF TC=0+-100 Mfr Code 28480 2M627 2M627 11502 11502 11502 2M627 2M627 2M627 2M627 11502 2M627 2M627 2M627 2M627 2M627 2M627 2M627 2M627 2M627 2M627 2M627 2M627 2M627 2M627 91637 2M627 2M627 2M627 2M627 2M627 2M627 2M627 2M627 2M627 2M627 2M627 2M627 Mfr Part Number 0699-2715 MCR18FX MCR18FX W1206R033001BT W1206R031002BT W1206R032002BT MCR18FX MCR18FX MCR18FX MCR18FX W1206R031003D MCR18FX MCR18FX MCR18FX MCR18FX MCR18FX MCR18FX MCR18FX MCR18FX MCR18FX MCR18FX MCR18FX MCR18FX MCR18FX MCR18FX RS-2 5K05% MCR18FX MCR18FX MCR18FX MCR18FX MCR18FX MCR18FX MCR18FX MCR18FX MCR18FX MCR18FX MCR18FX MCR18FX 6 3 RESISTOR 5.62K +-1% .125W TKF TC=0+-100 RESISTOR 215 +-1%.125W TKF TC=0+-100 RESISTOR 10K +-1% .125W TKF TC=0+-100 4 2 RESISTOR 5K +-5% 3W PWI TC=0+-20 RESISTOR 34.8 +-1% .125W TKF TC=0+-100 RESISTOR 5.62K +-1% .125W TKF TC=0+-100 RESISTOR 10K +-1% .125W TKF TC=0+-100 RESISTOR 38.3K +-1% .125W TKF TC=0+-100 RESISTOR 1K +-1% .125W TKF TC=0+-100 2 2 2 2 RESISTOR 17.8K +-1% .125W TKF TC=0+-100 RESISTOR 22.1K +-0.1% .125W TF TC=0+-25 RESISTOR 196K +-1% .125W TKF TC=0+-100 RESISTOR 200K +-1% .125W TKF TC=0+-100 RESISTOR 215 +-1% .125W TKF TC=0+-100 RESISTOR 1K +-1% .125W TKF TC=0+-100 RESISTOR 10K +-1% .125W TKF TC=0+-100 107 Chapter 6 Replaceable Parts E3631-60002 Top PCB Assembly Reference Designator R60 R61 R62 R63 R64 R65 R66-R67 R68 R69 R72 R73 R74 R75 R76 R77-R78 R79 R80 R81 R82 R83 R84 R85 R86 R87 R88 R89 R90 R91 R92 R93 R94 R95 R96 R97 R98 R99 R100 R101 Agilent Part Number 0699-1456 0699-1381 0757-0813 0811-2188 0699-2721 0699-3151 0811-3909 0699-3151 0699-2721 0811-2188 0764-0033 0699-1394 0699-1391 0699-1394 0699-1415 0699-1425 0699-1394 0699-1380 0699-1425 0699-1380 0699-1425 0699-1405 0699-1394 0699-1423 0699-1318 0699-3590 0699-2822 0699-1391 0699-1380 0699-1318 0699-1403 0699-1377 0699-1332 0699-1396 0811-2188 0699-1386 0699-1456 0699-1394 Qty 2 1 2 2 2 2 Description RESISTOR 562K +-1% .125W TKF TC=0+-100 RESISTOR 3.48K +-1% .125W TKF TC=0+-100 RESISTOR 475 +-1% .5W TF TC=0+-100 RESISTOR 5K +-5% 3W PWI TC=0+-20 RESISTOR 3.16K +-0.1% .125W TF TC=0+-25 RESISTOR 261K +-0.1% .125W TF TC=0+-250 RESISTOR .2 +-1% 10W PWI TC=0+-90 RESISTOR 261K +-0.1% .125W TF TC=0+-250 RESISTOR 3.16K +-0.1% .125W TF TC=0+-25 RESISTOR 5K +-5% 3W PWI TC=0+-20 Mfr Code 2M627 2M627 91637 91637 2M627 2M627 28480 2M627 2M627 91637 91637 2M627 2M627 2M627 2M627 2M627 2M627 2M627 2M627 2M627 2M627 2M627 2M627 2M627 2M627 2M627 2M627 2M627 2M627 2M627 2M627 2M627 2M627 2M627 91637 2M627 2M627 2M627 Mfr Part Number MCR18FX MCR18FX CMF-654750FT-1 RS-2 5K05% MCR18FX MCR18FX 0811-3909 MCR18FX MCR18FX RS-2 5K05% FP69 33R0 5% MCR18FX MCR18FX MCR18FX MCR18FX MCR18FX MCR18FX MCR18FX MCR18FX MCR18FX MCR18FX MCR18FX MCR18FX MCR18FX MCR18FX MCR18FX MCR18FX MCR18FX MCR18FX MCR18FX MCR18FX MCR18FX MCR18FX MCR18FX RS-2 5K05% MCR18FX MCR18FX MCR18FX 1 11 RESISTOR 33 +-%5% 2W MO TC=0+-200 RESISTOR 14.7K +-1% .125W TKF TC=0+-100 RESISTOR 10K +-1% .125W TKF TC=0+-100 RESISTOR 14.7K +-1% .125W TKF TC=0+-100 2 4 RESISTOR 100 +-1% .125W TKF TC=0+-100 RESISTOR 261 +-1% .125W TKF TC=0+-100 RESISTOR 14.7K +-1% .125W TKF TC=0+-100 RESISTOR 3.16K +-1% .125 TKF TC=0+-100 RESISTOR 261 +-1% .125W TKF TC=0+-100 RESISTOR 3.16K +-1% .125 TKF TC=0+-100 RESISTOR 261 +-1% .125W TKF TC=0+-100 RESISTOR 38.3K +-1% .125W TKF TC=0+-100 RESISTOR 14.7K +-1% .125W TKF TC=0+-100 RESISTOR 215 +-1% .125W TKF TC=0+-100 RESISTOR 1K +-1% .125W TKF TC=0+-100 RESISTOR 22.1K +-0.1% .125W TF TC=0+-25 RESISTOR 200K +-1% .125W TKF TC=0+-100 RESISTOR 10K +-1% .125W TKF TC=0+-100 RESISTOR 3.16K +-1% .125W TKF TC=0+-100 RESISTOR 1K +-1% .125W TKF TC=0+-100 3 1 RESISTOR 31.6K +-1% .125W TKF TC=0+-100 RESISTOR 2.37K +-1% .125W TKF TC=0+-100 RESISTOR 196K +-1% .125W TKF TC=0+-100 RESISTOR 17.8K +-1% .125W TKF TC=0+-100 RESISTOR 5K +-5% 3W PWI TC=0+-20 RESISTOR 5.62K +-1% .125W TKF TC=0+-100 RESISTOR 562K +-1% .125W TKF TC=0+-100 RESISTOR 14.7K +-1% .125W TKF TC=0+-100 108 Chapter 6 Replaceable Parts E3631-60002 Top PCB Assembly Reference Designator R103 R106-R107 R108 R109 R110 R111 R112 R113 R114 R115 R116 R117 R118-R119 R120 R122 R123-R124 R125 R126-R129 RT1-RT8 U1 U2 U3 U4 U5 U6 U7 U8 U9-U10 U11 U12 U13 U14 U15 U16 U17 U18 U19 U20 Agilent Part Number 0699-1357 0699-1391 0757-0813 0699-1403 0699-1394 0699-1403 0699-1394 0699-3431 0699-1394 0699-3431 0699-1394 0699-3431 0699-1394 0699-3431 0699-1425 0699-1423 0699-1423 0699-2837 0837-0261 1826-4284 1826-1838 1826-2420 1821-0434 1820-4346 1826-1925 1826-2420 1826-1991 1826-1622 1820-5790 1826-2793 1821-0434 1818-5187 1818-4777 1820-8907 1820-6721 1818-5236 1820-5478 1826-0393 Qty Description RESISTOR 34.8 +-1% .125W TKF TC=0+-100 RESISTOR 10K +-1% .125W TKF TC=0+-100 RESISTOR 475 +-1% .5W TF TC=0+-100 RESISTOR 31.6K +-1% .125W TKF TC=0+-100 RESISTOR 14.7K +-1% .125W TKF TC=0+-100 RESISTOR 31.6K +-1% .125W TKF TC=0+-100 RESISTOR 14.7K +-1% .125W TKF TC=0+-100 Mfr Code Mfr Part Number 2M627 MCR18FX 2M627 MCR18FX 91637 CMF-654750FT-1 2M627 MCR18FX 2M627 MCR18FX 2M627 MCR18FX 2M627 MCR18FX 2M627 MCR18FX 2M627 MCR18FX 2M627 MCR18FX 2M627 MCR18FX 2M627 MCR18FX 2M627 MCR18FX 2M627 MCR18FX 2M627 MCR18FX 2M627 MCR18FX 05524 05524 34371 01870 10858 24355 28480 28480 24355 24355 24355 01295 28480 24355 28480 01295 S0482 27014 27014 28480 27014 CRCW12062150F PTN1206E3002BB V275LA20A CS-8126-1THE5 LT1021DCS8-5 AD706JR 1821-0434 1820-4346 OP-27GS AD706JR AD711JR TL074D 1820-5790 AD1851R 1821-0434 TMS27PC020-150FML 4 RESISTOR 4.99K +-1% .125W TKF TC=0+-100 RESISTOR 14.7K +-1% .125W TKF TC=0+-100 RESISTOR 4.99K +-1% .125W TKF TC=0+-100 RESISTOR 14.7K +-1% .125W TKF TC=0+-100 RESISTOR 4.99K +-1% .125W TKF TC=0+-100 RESISTOR 14.7K +-1% .125W TKF TC=0+-100 RESISTOR 4.99K +-1% .125W TKF TC=0+-100 RESISTOR 261 +-1% .125W TKF TC=0+-100 RESISTOR 215 +-1% .125W TKF TC=0+-100 RESISTOR 215 +-1% .125W TKF TC=0+-100 4 8 1 1 2 2 1 1 1 3 1 1 1 1 1 1 1 1 2 RESISTOR 30K +-0.1% .125W TF TC=0+-25 V SUPPRESSOR 650V 4500A IC PWR MGT-V-REG-L-DDRPOUT 4.85/5.15V IC PWR MGT-V-REF-FXD 4.95/5.05V 8PIN IC OP AMP LP DUAL 8PIN PLSTC-SOIC IC ANLG-MUXR/DEMUXR CMOS/HC 8-CHA IC MUXR/DATA-SEL CMOS/HC 2-TO-1LINE IC OP AMP LOW-NOISE SINGLE 8PIN IC OP AMP LP DUAL 8PIN PLSTC-SOIC IC CP AMP HS SINGLE 8PIN PLSTC-SOIC IC OP AMP LOW-BIOS-H-IMPD QUAD 14PIN IC SHF-RGTR CMOS/HC SYNCHRO SERIAL D/A 16-BIT 16-P-SOIC BICMOS IC ANLG-MUXR/DEMUXR CMOS/HC 8-CHA IC 2M-BIT OTP 150-NS CMOS IC 256K-BIT SRAM 70-NS COMS IC-ASIC GT-ARY 600 GATES CMOS SCX6200 IC-16-BIT MCU A/D I/O TIMER IC 4K-BIT EEPROM 500-NS CMOS IC FF CMOS/HCT D-TYPE POS-EDGE-TRIG IC PWR MGT-V-REG-ADJ-POS 1.2/37V 3PINS 6 CXK58257AM-70L SCX6206AK0 N80C196KB12 NM93C66M8 1820-5478 LM317T 109 Chapter 6 Replaceable Parts E3631-60002 Top PCB Assembly Reference Designator U21 U22 U23 U24 U25 U26 U27 U28 U29 U30 Y1 Agilent Part Number 1826-1862 1990-1659 1826-1572 1826-0527 1826-0393 1826-1622 1826-0393 1826-1572 1990-1659 1826-1528 0410-4009 Qty 1 2 2 1 1 Description IC OP AMP LOW-BIAS-H-IMPD DUAL 8 PIN OPTO-ISOLATOR LED-PTRIAC IF=50mA-max IC COMPARATOR PRCN DUAL 8PIN PLSTC IC PWR MGT-V-REG-ADJ-NEG 1.2/37V 3PINS IC PWR MGT-V-REG-ADJ-POS 1.2/37V 3PINS IC OP AMP LOW-BIOS-H-IMPD QUAD 14PIN IC PWR MGT-V-REG-ADJ-POS 1.2/37V 3PINS IC COMPARATOR PRCN DUAL 8PIN PLSTC OPTO-ISOLATOR LED-PTRIAC IF=50mA-max Mfr Code 01295 12601 01295 27014 27014 01295 27014 01295 12601 27014 00830 Mfr Part Number TL072ACD MCP3020Z LM393D LM337T LM317T TL074D LM317T LM393D MCP3020Z LM339M PBRC-12.0BRN07 1 1 IC COMPARATOR LP QUAD 14PIN PLSTC-SOIC RESONATOR-CERAMIC 12MHz 110 Chapter 6 Replaceable Parts E3631-60003 VFD Assembly E3631-60003 VFD Assembly Reference Agilent Part Designator Number C1-C3 C4-C5 C6 C7-C8 C9 C10-C15 C16-C17 C18 C19-C20 C25 CR1 CR2 Q1-Q2 R1-R4 R5 R6 R7-R9 R10 R11 R12 R13-R15 R16-R19 R20-R21 R22 U1 U2 U3 U4 U5 U6 U7 U8 U9 Y1 J1 0160-6497 0180-3751 0160-5945 0160-6497 0160-5945 0160-6497 0160-5947 0160-5945 0160-6497 0160-6497 1906-0291 1902-1542 1854-1053 0699-1348 0699-1391 0699-1400 0699-1391 0699-1318 0699-1391 0699-1378 0699-1391 0699-1423 0699-1330 0699-1400 1820-5330 1826-1402 1826-2264 1820-5562 1820-5478 1820-6756 34401-88804 1826-1528 E3631-60031 0410-4009 1252-7161 1 1 1 1 1 1 1 1 1 1 1 4 2 1 1 1 1 2 4 8 2 2 Qty 14 2 3 Description CAP-FXD 0.1uF+-10%50V CER COG CAP-FXD 1uF+-20%35V TA CAP-FXD 0.01uF+-10%50V CERX7R CAP-FXD 0.1uF+-10%50V CER COG CAP-FXD 0.01uF+-10%50V CERX7R CAP-FXD 0.1uF+-10%50V CER COG CAP-FXD 1000pF+-10% 50V CER COG CAP-FXD 0.01uF+-10%50V CERX7R CAP-FXD 0.1uF+-10%50V CER COG CAP-FXD 0.1uF+-10%50V CER COG DIODE-DUAL 70V 100mA TO-236 AA DIODE-ZNR 6.2V 5% TO-236(SOT-23) TRANSISTOR NPN SI SOT-23(TO-236AB) RESISTOR 14.7 +-1% .125W TKF TC=0+-100 RESISTOR 10K +-1% .125W TKF TC=0+-100 RESISTOR 26.1K +-1% .125W TKF TC=0+-100 RESISTOR 10K +-1% .125W TKF TC=0+-100 RESISTOR 1K +-1% .125W TKF TC=0+-100 RESISTOR 10K +-1% .125W TKF TC=0+-100 RESISTOR 2.61K +-1% .125W TKF TC=0+-100 RESISTOR 10K +-1% .125W TKF TC=0+-100 RESISTOR 215 +-1% .125W TKF TC=0+-100 RESISTOR 100K +-1% .125W TKF TC=0+-100 RESISTOR 26.1K +-1% .125W TKF TC=0+-100 IC-INTERFACE DRVR BIPOLAR DISPLAY IC PWR MGT-V-REG-FXD-POS 4.8/5.2V 8PINS IC PWR MGT-UND-V-SEN 8 PINS P-SOIC PKG IC GATE CMOS/HC NOR QUAD 2-INP IC FF CMOS/HCT D-TYPE POS-EDGE-TRIG IC SHF-RGTR COMS/HC MULTI-MODE IC-8-BIT MCU W/4K EPROM;12MHZ IC COMPARATOR LP QUAD 14PIN PLST-SOIC VFD RESONATOR-CERAMIC 12MHz CONNECTOR-TIN-PLATED 12-P(RGHT-ANGLE) Mfr Code 04222 12340 04222 04222 04222 04222 04222 04222 04222 04222 28480 04713 04713 Mfr Part Number 12065C104KAT2A T491B105M035AS 08055C103KAT A 12065C104KAT2A 08055C103KAT A 12065C104KAT2A 08055C102KAT A 08055C103KAT A 12065C104KAT2A 12065C104KAT2A 1906-0291 BZX84C6V2 MMBT2222ALT1 2M627 MCR18FX 2M627 MCR18FX 2M627 MCR18FX 2M627 MCR18FX 2M627 MCR18FX 2M627 2M627 2M627 MCR18FX 2M627 MCR18FX 2M627 MCR18FX 2M627 MCR18FX 2M627 MCR18FX 01295 27014 04713 28480 28480 27014 34649 27014 28480 00830 28480 SN75518FN LM78L05ACM MC34064D-5 1820-5562 1820-5478 MM74HC299WM N87C51 LM339M E3631-60031 PBRC-12.0BRN07 1252-7161 6 111 Chapter 6 Replaceable Parts E3631-60004 Bottom PCB Assembly E3631-60004 Bottom PCB Assembly Reference Designator SW1 C1-C6 C7 C8 C9 C10-C14 C15 C16 C17 C18 C19 C20 C21-C22 C23-C24 C25-C26 C27 C28 C29-C30 C31 C33 C34-C35 C36 C37 C38 C39-C40 C41-C42 C43-C44 C45 C46-C47 C48-C49 C50-C51 C52 C53 C55 CR1-CR2 Agilent Part Number 3101-2985 0160-6497 0180-4228 0180-3751 0160-6940 0160-6497 0180-2980 0160-5959 0160-6497 0160-5959 0160-6497 0160-5957 0160-6497 0160-5957 0160-6497 0160-5957 0160-5959 0160-6497 0160-5959 0160-6497 0160-6104 0160-6736 0180-4116 0180-4575 0180-3751 0160-6940 0180-2980 0160-4065 0160-4183 0180-3962 0160-6225 0160-5967 0160-4535 0160-4832 1906-0291 6 1 2 2 2 1 1 2 1 1 1 4 3 4 Qty 1 21 1 3 3 Description SWITCH-PB DPST-NO ALTNG 4A 250VAC CAP-FXD 0.1uF+-10%50V CER X7R CAP-FXD 47uF +-20% 10V TA CAP-FXD 1uF +-20% 35V TA CAP-FXD 0.33uF +-20% 50V CER Z5U CAP-FXD 0.1uF+-10%50V CER X7R CAP-FXD 1000uF +-20% 50V AL-ELCTLT CAP-FXD 33pF +-5% 50V CER COG CAP-FXD 0.1uF+-10%50V CER X7R CAP-FXD 33pF +-5% 50V CER COG CAP-FXD 0.1uF+-10%50V CER X7R CAP-FXD 47pF +-5% 50V CER COG CAP-FXD 0.1uF+-10%50V CER X7R CAP-FXD 47pF +-5% 50V CER COG CAP-FXD 0.1uF+-10%50V CER X7R CAP-FXD 47pF +-5% 50V CER COG CAP-FXD 33pF +-5% 50V CER COG CAP-FXD 0.1uF+-10%50V CER X7R CAP-FXD 33pF +-5% 50V CER COG CAP-FXD 0.1uF+-10%50V CER X7R CAP-FXD 2200pF +-5% 50V CER COG CAP-FXD 0.01uF +-10% 50V CER X7R CAP-FXD 22uF+-20% 20V TA CAP-FXD 47uF +-20% 20V TA CAP-FXD 1uF +-20% 35V TA CAP-FXD 0.33uF +-20% 50V CER Z5U CAP-FXD 1000uF +-20% 50V AL-ELCTLT CAP-FXD 1000pF +-20% 250V PPR-MET(Y-CAP) CAP-FXD 33000uF +30%-10% 16V AL-ELCTLT CAP-FXD 0.33uF +-10% 250V POLYE-MET CAP-FXD 100pF +-5% 50V CER COG CAP-FXD 1uF +-10% 50V CER X7R CAP-FXD 0.01uF+-10% 100V CER X7R DIODE-DUAL 70V 100mA TO-236 AA Mfr Code 28480 04222 12340 12340 04222 04222 S4217 04222 04222 04222 04222 51406 04222 51406 04222 51406 04222 04222 04222 04222 12340 12340 12340 12340 12340 04222 S4217 28480 S4217 06127 12340 12340 02010 28480 Mfr Part Number 3101-2985 12065C104KAT A T491D476M010AS T491B105M035AS 12105E334MAT A 12065C104KAT A SME50VB102M16X25LL 08051A330JATA 12065C104KAT A 08051A330JATA 12065C104KAT A GRM39COG470J50* 12065C104KAT A GRM39COG470J50* 12065C104KAT A GRM39COG470J50* 08051A330JATA 12065C104KAT A 08051A330JATA 12065C104KAT A C1206C222J5GAL C1206C103K5RAC T491D226M020AS T491D476K020AS T491B105M035AS 12105E334MAT A SME50VB102M16X25LL CAP-FXD 0.1uF +-20% 250V PPR-MET(X-CAP) 28480 0160-4065 0160-4183 80D333P016ME2 MKS4-.33/250/10 C0805C101J5GAC C330C105K5R5CA SA101C103KAAH 1906-0291 112 Chapter 6 Replaceable Parts E3631-60004 Bottom PCB Assembly Reference Designator CR3 CR5-CR6 CR9-CR12 CR14 CR15-CR16 CR17 VR1-VR2 E1 J1 J2 J3 J4 J5 J7-J8 J9 J10-J11 J12-J13 Q1 Q2 Q3 Q4-Q6 Q7 F1-F2 R1-R3 R4 R5 R6 R7 R8 R12 R13 R14 R15 R16 R17 R18-R19 R20 R21 Agilent Part Number 1906-0407 1901-1227 1906-0291 1901-1163 1901-1149 1906-0400 1826-0774 9164-0173 1252-2161 1252-2266 1252-7162 1252-6880 1252-2771 1252-2786 1251-8363 1252-2771 1252-2786 1853-0525 1853-0041 1855-1660 1853-0525 1854-1053 0669-2715 0699-1318 0699-1330 0699-1318 0699-1380 0699-1374 0699-1391 0699-1391 0699-1425 0699-1262 0699-2145 0699-1444 0699-3661 0699-3431 0699-1403 0699-1394 Qty 1 2 1 2 1 2 1 1 1 1 1 3 4 1 Description DIODE-FW BRDG 400V 1A DIODE-SWICHING 75V 200mA 6nS TO-236 DIODE-DUAL 70V 100mA TO-236 AA DIODE-PWR-S 60V 5A DO-201AD DIODE-PWR RECT 400V 1A 50NS DO-41 DIODE-FW BRDG 600V 6A IC PWR MGT-V-REF-FXD 1.223/1.247V TO-92 ALARM-AUDIBLE PIEZO ALARM PIN TYPE; 25V CONN-RECT MICRORBN 24-CKT 24-CONT CONN-RECT D-SUBMIN 9-CKT 9-CONT CONNECTOR-TIN-PLATED 12PIN CONN-POST-TYPE HDR 8P CONNECTOR-SGL CONT QDISC-M.25-IN-B CONN-POST-TP-HDR 2P CONN-POST TYPE.156-PIN-SPCG-MTG-EN CONNECTOR-SGL CONT QDISC-M.25-IN-B CONN-POST-TP-HDR 2P Mfr Code 71744 27014 28480 71744 71744 71744 27014 51406 00779 00779 28480 27264 00779 27264 27264 00779 27264 04713 04713 03038 04713 04713 28480 2M627 2M627 2M627 2M627 2M627 2M627 2M627 2M627 2M627 2M627 2M627 2M627 2M627 2M627 2M627 Mfr Part Number DF04S BAS16 1906-0291 FE6B UF4004 GBU8J LM385BZ-1.2 PKM24-4A0-1 554923-2 748959-1 1252-6915 22-03-5085 63067-1 10-63-4027 09-65-2038 10-63-4027 10-63-4027 MMBT2907A MM5007 IRFP044N MMBT2907A MMBT2222ALT1 0669-2715 MCR18FX MCR18FX MCR18FX MCR18FX MCR18FX MCR18FX MCR18FX MCR18FX MCR18FX MCR18FX MCR18FX MCR18FX MCR18FX MCR18FX MCR18FX 4 1 1 1 2 8 2 2 1 4 5 4 4 1 4 4 2 1 TRANSISTOR PNP SI TO-236AA PD=200mW TRANSISTOR PNP SI TO-39 PD=1W FT=60MHz TRANSISTOR MOSFET N-CHAN E-MODE(TO247AC) TRANSISTOR PNP SI TO-236AA PD=200mW TRANSISTOR NPN SI SOT-23(TO-236AB) RESISTOR-FUSE 1 OHM +-5% 0.5W @70 RESISTOR 1K +-1% .125W TKF TC=0+-100 RESISTOR 100K +-1% .125W TKF TC=0+-100 RESISTOR 1K +-1% .125W TKF TC=0+-100 RESISTOR 3.16K +-1% .125W TKF TC=0+-100 RESISTOR 1.78K +-1% .125W TKF TC=0+-100 RESISTOR 10K +-1% .125W TKF TC=0+-100 RESISTOR 10K +-1% .125W TKF TC=0+-100 RESISTOR 261 +-1% .125W TKF TC=0+-100 RESISTOR 2.2K +-1% .125W TKF TC=0+-100 RESISTOR 33K +-1% .125W TKF TC=0+-100 RESISTOR 178K +-1% .125W TKF TC=0+-100 RESISTOR 6.49K +-1% .125W TKF TC=0+-100 RESISTOR 4.99K +-1% .125W TKF TC=0+-100 RESISTOR 31.6K +-1% .125W TKF TC=0+-100 RESISTOR 14.7K +-1% .125W TKF TC=0+-100 6 113 Chapter 6 Replaceable Parts E3631-60004 Bottom PCB Assembly Reference Designator R22-R23 R24-R25 R26 R27 R28 R29 R30 R31 R32 R33 R34 R35 R36 R37 R38 R39 R40-R42 R43 R44 R45 R46 R47 R48 R49 R50 R51 R52 R53 R54-R55 R56-R57 R58 R59 R60-R61 R62 R63 R64 R65-R66 R67 Agilent Part Number 0699-3431 0699-1357 0699-1408 0699-1425 0699-1262 0699-1414 0699-2145 0699-3661 0699-1330 0699-3661 0699-2145 0699-1425 0699-1448 0699-1262 0699-1405 0699-1425 0699-1318 0699-1405 0699-1403 0699-3661 0699-2145 0699-1414 0699-1425 0699-1262 0699-1398 0811-3909 0811-1799 0699-1318 0699-1377 0699-1423 0811-1806 0811-3909 0699-1391 0699-1327 0699-1456 0699-1448 0699-1456 0699-1327 Qty Description RESISTOR 4.99K +-1% .125W TKF TC=0+-100 Mfr Code 2M627 2M627 2M627 2M627 2M627 2M627 2M627 2M627 2M627 2M627 2M627 2M627 2M627 2M627 2M627 2M627 2M627 2M627 2M627 2M627 2M627 2M627 2M627 2M627 2M627 28480 91637 2M627 2M627 2M627 91637 28480 2M627 2M627 2M627 2M627 2M627 2M627 Mfr Part Number MCR18FX MCR18FX MCR18FX MCR18FX MCR18FX MCR18FX MCR18FX MCR18FX MCR18FX MCR18FX MCR18FX MCR18FX MCR18FX MCR18FX MCR18FX MCR18FX MCR18FX MCR18FX MCR18FX MCR18FX MCR18FX MCR18FX MCR18FX MCR18FX MCR18FX 0811-3909 RS-2 MCR18FX MCR18FX MCR18FX RS-2 2K 0811-3909 MCR18FX MCR18FX MCR18FX MCR18FX MCR18FX MCR18FX 2 1 RESISTOR 34.8 +-1% .125W TKF TC=0+-100 RESISTOR 51.1K +-1% .125W TKF TC=0+-100 RESISTOR 261 +-1% .125W TKF TC=0+-100 RESISTOR 2.2K +-1% .125W TKF TC=0+-100 2 RESISTOR 90.9K +-1% .125W TKF TC=0+-100 RESISTOR 33K +-1% .125W TKF TC=0+-100 RESISTOR 6.49K +-1% .125W TKF TC=0+-100 RESISTOR 100K +-1% .125W TKF TC=0+-100 RESISTOR 6.49K +-1% .125W TKF TC=0+-100 RESISTOR 33K +-1% .125W TKF TC=0+-100 RESISTOR 261 +-1% .125W TKF TC=0+-100 2 2 RESISTOR 316K +-1% .125W TKF TC=0+-100 RESISTOR 2.2K +-1% .125W TKF TC=0+-100 RESISTOR 38.3K +-1% .125W TKF TC=0+-100 RESISTOR 261 +-1% .125W TKF TC=+-100 RESISTOR 1K +-1% .125W TKF TC=0+-100 RESISTOR 38.3K +-1% .125W TKF TC=0+-100 RESISTOR 31.6K +-1% .125W TKF TC=0+-100 RESISTOR 6.49K +-1% .125W TKF TC=0+-100 RESISTOR 33K +-1% .125W TKF TC=0+-100 RESISTOR 90.9K +-1% .125W TKF TC=0+-100 RESISTOR 261 +-1% .125W TKF TC=0+-100 RESISTOR 2.2K +-1% .125W TKF TC=0+-100 1 2 1 2 2 1 RESISTOR 21.5K +-1% .125W TKF TC=0+-100 RESISTOR .2 +-1% 10W PWI TC=+-90 RESISTOR 390 +-5% 3W PWI TC=0+-20 RESISTOR 1K +-1% .125W TKF TC=0+-100 RESISTOR2.37K+-1%.125W TKF TC=0+-100 RESISTOR 215 +-1% .125W TKF TC=+-100 RESISTOR 2K +-5% 3W PWI TC=0+-20 RESISTOR .2 +-1% 10W PWI TC=+-90 RESISTOR 10K +-1% .125W TKF TC=0+-100 2 3 RESISTOR 1M +-1% .125W TKF TC=0+-100 RESISTOR 562K +-1% .125W TKF TC=0+-100 RESISTOR 316K +-1% .125W TKF TC=0+-100 RESISTOR 562K +-1% .125W TKF TC=0+-100 RESISTOR 1M +-1% .125W TKF TC=0+-100 114 Chapter 6 Replaceable Parts E3631-60004 Bottom PCB Assembly Reference Designator R68-R69 R70 RT1 U1-U4 U6 U7 U8 U9 U10 U11 U12 U13 U14 U15-U18 U19-U23 U24 U25 Y1 Agilent Part Number 0699-6239 0699-1327 0837-0261 1990-1552 1820-6175 1820-6176 1820-1721 1820-6470 34401-88805 1826-0144 1820-7662 1826-1528 1826-0393 1990-1838 1826-1813 1826-0527 1826-0393 0410-4009 Qty 2 1 5 1 1 1 1 1 1 1 1 2 4 5 1 1 Description RESISTOR 2.2M +-1% .063W TKF TC=0+-250 RESISTOR 1M +-1% .125W TKF TC=0+-100 V SUPPRESSOR 650V 4500A OPTO-ISOLATOR LED-IC GATE IF=10mA-max IC-INTERFACE XCVR BIPOLAR BUS OCTL IC-INTERFACE XCVR BIPOLAR BUS OCTL IC-GPIB CONTROLLER MP9914FNL IC SCHMITT-TRIG CMOS/HCT INV HEX IC-8-BIT MCU W/8K EPROM&PRAMBL CNT IC PWR MGT-V-REG-FXD-POS4.8/5.2V TO220 IC-INTEREACE DRVR/RCVR BIPOLAR DUAL IC COMPARATOR LP QUAD 14PIN PLSTC IC PWR MGT-V-REG-ADJ-POS 1.2/37V 3PINS OPTO-ISOLATOR LINEAR IC OP AMP GP DUAL 8PIN PLSYC-SOIC IC PWR MGT-V-REG-ADJ-NEG 1.2/37V 3PINS IC PWR MGT-V-REG-ADJ-POS 1.2/37V 3PINS RESONATOR-CERAMIC 12MHz Mfr Code 00746 2M627 34371 28480 01295 01295 36633 04713 34649 04713 10858 27014 27014 28480 27014 27014 27014 28480 Mfr Part Number MCR01-MZS-F-2204 MCR18FX V275LA20A 1990-1552 SN75ALS162DW SN75ALS160DW MC14549BCP MC74HCT14AD N87C51FA MC7805CT LT1180CS LM339M LM317T 1990-1838 LM358M LM337T LM317T 0410-4009 6 115 Chapter 6 Replaceable Parts E3631-60005 Front Frame Assembly E3631-60005 Front Frame Assembly Reference Designator C32(Bottom) C42-C43(Top) Agilent Part Number 0180-2980 0180-4355 E3631-80007 E3631-40016 E3631-20011 E3631-20013 E3631-20012 E3631-40015 E3631-40012 E3631-40017 E3631-60003 E3631-60009 E3631-60011 E3631-60016 Qty 1 2 1 1 3 1 2 1 1 1 1 1 1 1 Description CAP-FXD 1000uF +-20% AL-ELCTLT CAP-FXD 470uF +-20% AL-ELCTLT FRONT LABEL KEYPAD BINDING POST RED BINDING POST GREEN BINDING POST BLACK FRONT FRAME WINDOW PLATE FOR FRONT KNOB VFD BOARD ASSEMBLY CHASSIS GROUND ASSEMBLY2 +6V OUTPUT & SENSING WIRE ASSEMBLY 25V OUTPUT & SENSING WIRE ASSEMBLY Mfr Code 55680 S4217 28480 28480 28480 28480 28480 28480 28480 28480 28480 28480 28480 28480 Mfr Part Number SME50VB102M16X25LL UPF1H471MRH E3631-80001 E3631-40005 1510-0135 E3631-20008 1510-0136 E3631-40001 E3631-20004 E3631-40006 E3631-60003 E3631-60009 E3611-60011 E3631-60016 E3631-60005 Power SupplyAssembly Reference Designator Agilent Part Number E3631-60017 E3631-60020 9100-5385 E3631-00007 E3631-40010 E3631-40011 E3631-40007 E3631-40013 5041-9607 E3631-40014 E3631-60018 E3631-60013 E3631-60006 E3631-60005 Qty 1 1 1 1 1 1 1 1 2 1 1 1 1 1 Description DC FAN HARNESS ASSY TRANSFORMER BRACKET ASSEMBLY MAIN TRANSFORMER COVER BUMPER-FRONT BUMPER-REAR PUSH ROD STRAP HANDLE REAR CAP REAR BEZEL FLAT WIRE CONTROL & BIAS HARNESS AC INLET ASSEMBLY FRONT FRAME ASSEMBLY Mfr Code 28480 28480 28480 28480 28480 28480 28480 28480 28480 28480 28480 28480 28480 28480 Mfr Part Number E3631-60017 E3631-60020 9100-5585 E3631-00004 E3631-40003 E3631-40004 E3631-40007 E3631-40008 5041-8834 E3631-40002 E3631-60018 E3631-60013 E3631-60006 E3631-60005 116 Chapter 6 Replaceable Parts Manufacturer s List Manufacturer s List Mfr Code 00746 00779 00830 01295 01870 02010 03038 04222 04713 05524 06127 06352 10858 11502 12340 12601 24355 27014 27264 28480 34371 34649 50080 51406 55680 71744 91637 2M627 S0482 S4217 Manufacturer s Name ROHM CO LTD AMP INC KYOCERA INTERNATIONAL INC TEXAS INSTRUMENTS INC CHERRY CORPORATION AVX CORP INTERNATIONAL RECTIFIER CORP AVX CORP MOTOROLA INC VISHAY INTERTECHNOLOGY INC WILHELM WESTERMANN TDK CORP OF AMERICA LINEAR TECHNOLOGY CO IRC INC KEMET ELECTRONICS CO QUALITY TECHNOLOGY CO ANALOG DEVICES INC NATIONAL SEMICONDUCTOR CORP MOLEX INC HP DIV 01 SAN JOSE COMPONENTS HARRIS CORP INTEL CORP SGS-THOMSON MICROELECTRONICS INC MURATA CORPORATION OF AMERICA NICHICON (AMERICA) CORP GENERAL INSTRUMENT CORP VISHAY ELECTRONIC COMPONENTS ROHM CORP SONY CORP NIPPON CHEMI-CON CORP Manufacturer s Address KYOTO, JP HARRISBURG, PA SAN DIEGO, CA DALLAS, TX WAUKEGAN, IL MYRTLE BEACH, SC EL SEGUNDO, CA GREAT NECK, NY ROSELLE, IL MALVERN, PA, MANNHEIM, DENMARK SKOKIE, IL MILPITAS, CA CORPUS CHRISTI, TX GREENVILLE, SC PALO ALTO, CA NORWOOD, MA SANTA CLARA, CA LISLE, IL SAN JOSE, CA MELBOURNE, FL SANTA CLARA, CA PHOENIX, AZ MARIETTA, GA SCHAUMBERG, IL CLIFTON, NJ COLUMBUS, NE KYOTO 615, JP TYOKO, JP OHME-SHI, TYOKO JP 06127 60076 95035 78411 29606 94304 2062 95052 USA 95131 32901 95054 85002 30067 60195 7012 68601 11021 60195 17111 92123 75265 Zip Code 6 117 118 7 Backdating Backdating 7KLV FKDSWHU QRUPDOO\ FRQWDLQV LQIRUPDWLRQ QHFHVVDU\ WR DGDSW WKLV PDQXDO WR LQVWUXPHQWV QRW GLUHFWO\ FRYHUHG E\ WKH FXUUHQW FRQWHQW $W WKLV SULQWLQJ KRZHYHU WKH PDQXDO DSSOLHV WR DOO LQVWUXPHQWV 7KHUHIRUH QR LQIRUPDWLRQ LV LQFOXGHG LQ WKLV FKDSWHU 120 8 Schematics Schematics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opyright 1995 - 2000 Agilent Technologies All Rights Reserved. Printing History Edition 6, April 2000 New editions are complete revisions of the manual. Update packages, which are issued between editions, may contain additional information and replacement pages which you merge into the manual. The dates on this page change only when a new edition is published. Trademark Information Windows, Windows 95, and Windows NT are registered trademarks of Microsoft Corp. Certification Agilent Technologies certifies that this product met its published specifications at the time of shipment. Agilent further certifies that its calibration measurements are traceable to the United States National Institute of Standards and Technology (formerly National Bureau of Standards), to the extent allowed by that organization s calibration facility, and to the calibration facilities of other International Standards Organization members. Warranty This Agilent product is warranted against defects in materials and workmanship for a period of three years from date of shipment. Duration and conditions of warranty for this product may be superseded when the product is integrated into (becomes a part of) other Agilent products. During the warranty period, Agilent will, at its option, either repair or replace products which prove to be defective. The warranty period begins on the date of delivery or on the date of installation if installed by Agilent. Warranty Service For warranty service or repair, this product must be returned to a service facility designated by Agilent. For products returned to Agilent for warranty service, the Buyer shall prepay shipping charges to Agilent and Agilent shall pay shipping charges to return the product to the Buyer. However, the Buyer shall pay all shipping charges, duties, and taxes for products returned to Agilent from another country. Limitation of Warranty The foregoing warranty shall not apply to defects resulting from improper or inadequate maintenance by the Buyer, Buyer-supplied products or interfacing, unauthorized modification or misuse, operation outside of the environmental specifications for the product, or improper site preparation or maintenance. The design and implementation of any circuit on this product is the sole responsibility of the Buyer. Agilent does not warrant the Buyer s circuitry or malfunctions of Agilent products that result from the Buyer s circuitry. In addition, Agilent does not warrant any damage that occurs as a result of the Buyer s circuit or any defects that result from Buyer-supplied products. To the extent allowed by local law, Agilent makes no other warranty, expressed or implied, whether written or oral with respect to this product and specifically disclaims any implied warranty or condition of merchantability, fitness for a particular purpose or satisfactory quality. For transactions in Australia and New Zealand: The warranty terms contained in this statement, except to the extent lawfully permitted, do not exclude, restrict, or modify and are in addition to the mandatory statutory rights applicable to the sale of this product. Exclusive Remedies To the extent allowed by local law, the remedies provided herein are the Buyer s sole and exclusive remedies. Agilent shall not be liable for any direct, indirect, special, incidental, or consequential damages (including lost profit or data), whether based on warranty, contract, tort, or any other legal theory. Notice The information contained in this document is subject to change without notice. To the extent allowed by local law, Agilent makes no warranty of any kind with regard to this material, including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose. To the extent allowed by local law, Agilent shall not be liable for errors contained herein or for incidental or consequential damages in connection with the furnishing, performance, or use of this material. No part of this document may be photocopied, reproduced, or translated to another language without the prior written consent of Agilent. Restricted Rights The Software and Documentation have been developed entirely at private expense. They are delivered and licensed as commercial computer software as defined in DFARS 252.2277013 (Oct 1988), DFARS 252.211-7015 (May 1991), or DFARS 252.227-7014 (Jun 1995), as a commercial item as defined in FAR 2.101(a), or as restricted computer software as defined in FAR 52.227-19 (Jun 1987) (or any equivalent agency regulation or contract clause), whichever is applicable. You have only those rights provided for such Software and Documentation by the applicable FAR or DFARS clause or the Agilent standard software agreement for the product involved. Safety Information Do not install substitute parts or perform any unauthorized modification to the product. Return the product to an HP Sales and Service Office for service and repair to ensure that safety features are maintained. Safety Symbols Warning Calls attention to a procedure, practice, or condition, that could possibly cause bodily injury or death. Caution Calls attention to a procedure, practice, or condition that could possibly cause damage to equipment or permanent loss of data. Earth ground symbol. Chassis ground symbol. ! Refer to the manual for specific Warning or Caution information to avoid personal injury or equipment damage. Hazardous voltages may be present. Warning No operator serviceable parts inside. Refer servicing to service-trained personnel. Warning For continued protection against fire, replace the line fuse only with a fuse of the specified type and rating. Manual Part Number: E3631-90011 Printed: April 2000 Edition 6 Printed in Korea

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