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DMMmanual_hi - OPERA TOR’S INSTRUCTION MANUAL DIGITAL...

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Unformatted text preview: OPERA TOR’S INSTRUCTION MANUAL DIGITAL MULTIMETER SAFETY lNFORHA'nON This murtimeter has been designed according to IE0 —1010 consenting electronic measuring Instruments with an overvoltage category (CAT it) and pollution 2. Follow all safety and operating Instructions to ensure that the meter is used safely and is kept in good operating condition. Full compliance with safety standards can be guaranteed only with test leads supplied. If necessary. they must be replaced with the type specified in this manual. SAFETY SYMBOLS A Important safety information. refer to the operating manual. A Dangerous voltage may be present. % Earth ground. IE Double insulation {Protection class ll). 2...: Fuse must be replaced with rating specified in the manual. MAINTENANCE Before opening the case. always disconnect test leads from all energized cirwits. For continue protection against fire; replace fuse only with the specified voltage and current ratings: F 200mN25lJVtQuick Acting) Never use the meter unless the back cover is in place and fastened completely. Do not use abrasives or solvents on the meter. To clean it using a damp cloth and mild detergent only. DURING USE - Never exceed the protection limit values indicated in specifications for each range of measurement. . When the meter is linked to measurement circuit. do not touch unused terminals. . Never use the meter to measure voltages that might exceed 600V above earth ground in category I] installations. . When the value scale to be measured is unknown beforehand. set the range selector at the highest position. 0 Before rotating the range selector to change functions. disconnect test leads from the cirwit under test. . When carrying out measurements-on TV or switching power cirwits always remember that there may be high amplitude voltages pulses at test points. which can damage the meter. . Always is careful when working with voltages above 80V dc or 30V ac rrns. Keep fingers behind the probe barriers while measuring. . Before attempting to insert transistors tor testing. always be sure that test reads have been disconnected from any measurement circuits. . Components should not be connected to the hFE socket when making voltage measurements with test leads. 0 Never perform resistance measurements on live circuits. GENERAL DESCRIPTION ' The meter is a handheld 31:? digital multimeter for measuring DC and AC voltage. DC current. Resistance, Diode, Transistor and Confintu Test with battery operated. The Back light of display is optional. MMMMMMM FRONT PANEL DESCRIPTION (1) Display 3 1r'2 digit. ? segment. 15mm high LCD. (3 Back light (option) When this button is pushed. the Back light of display is on. Alter about 5 seconds. the Back light is self-oft. The Back light is on again. just push this button once. ® Rotaryswitch This switch is used to select fundions and desired ranges as well as to turn onloff the meter. G) Hold button When this button is pushed. the display will keep the last reading and 'l' symbol will appear on the LCD untit pushing it again. (5} “10A” jack Plug in connector for red test lead for 10A measurement. 6: 'COM" jack Plug in connector for black (negative) test lead. (3 “VMA”jadt Plug in connector for red (positive) test lead for voltage. resistance and current (except 10A} measurements. SPECIFICATIONS Accuracy is specified for a period of one year after calibration and at 18 to 28'C(64°F to 82°F} with relative humidity to 80%. GENERAL Maximum voltage between :CATIIdOOV terminals and earth ground Fuse protection :F zoomsov Power :9V battery. NEDA 1604 or 8F22 Display : L00. 1999 counts. updates 2-3r sec. Measuring method :Dual-slope integration ND converter Oven'ange Indication :Onty figure "1' on the display Polarity indication :‘-'dispiayed for negative polarity Operating Environment :0 to 40C .4- Storage temperature :-10'C to 50'C. Low battery inolcat'ron :“ a: 'appears on the display Size :138mmX69rnrnx 31mm Weight : ApproxJ 709. Dc VOLTAGE zoo-w mar-m Overload Protedion: 250V rms. For 200mv range and saw do or rrns. ac for other ranges. Dc CURRENT mum—.- mum—I'- m-m- - Emu—mm- :I:1% ofrd tadiits 115%01' _:t2d-lts 13%Ofl’d_ i2dl_its um:- i1.2%ofrdt10di-its i1-2%ofrd. i10dI-its Overload Protection: 600V do or rms. ac for all ranges. Frequency range: 40Hz to 400Hz. Response: Average responding. calibrated in nus. of a sine wave. DIODE :- counuum n It continuity exists {about less than 1.5m). built-in buzzer will sound. Overload Protection: 250V dc or this. so. RESISTANCE ——I-EEB_ “—3 10.8%ofrd_ :l:2di_its “mi-:- Maximum Open Circuit Voltage: 3.2V I Overload Protection: 250V do or rms. so for all ranges. TRANSISTOR IIFE TEST 0-1000 0-1000 m Vce=3V OPERAHNG lNS‘I’RUCflONS Dc VOLTAGE MEASUREMENT 1. Connect the red test lead to the “VflmA' jack and the black lead to the 'COM' Jack. 2. Set rotary switch at desired DOV position. lithe voltage to be measured is not known beforehand. set range snatch at the highest range position and then reduce it until satisfactory resolution is obtained. 3. Connect test leads across the source or load being measured. 4. Read voltage value on the LCD display along with the ' polarity of the red lead connection. DC CURRENT MEASUREMENT 1. Connect the red test lead to the ‘V.D.mA" jack and the black test lead to “COM" jack. (For measurements between zoom and 10A. remove red lead to‘toA'lack.) Set the rotary switch at desired DOA position. Open the circuit in which the current is to be measured. and connect test leads in series with the circuit. 4. Read cunent value on LCD display along with the polarity of red lead connection. .3. saw AC VOLTAGE MEASUREMENT 1. 2. 3 4. Connect the red test lead to “v.9. mA'jack and the black test lead to the “COM” jack. Set the rotary switch at desired ACV position. Connect test leads across the source or load being measured. Read voltage value on the LCD display. RESISTANCE MEASUREMENT 1. 5”.” Connect the red test lead to “V. :1. mA' jack and black test lead to the “COM” jack. (111a polan‘ty of red lead is positive “+'.} Set the rotary switch at desired ”a” range position. Connect test leads across the resistor to be measured and read LCD display. If the resistance being measured is connected to a circuit. turn off power and discharge all capacitors before applying test probes. DIODE TEST 1. 9’!“ Connect the red test load to “V.n.mA'jack and the black test lead to the “COM” jack (The polarity of red lead is positive '+".}. Set the rotary switch at “N” position. Connect the red test lead to the anode of the diode to be tested and the black test lead to the cathode of the diode. The approx. forward voltage drop of the diode will be displayed. If the connection is reversed. only figure '1' will be shown. TRANSISTOR TEST 1. 2. Set the rotary switch at “hFE“ position. Determine whether the transistor under testing is NPN or PNP and locate the emitter. base and collector leads. Insert the leads Into proper holes of the hFE socket on the front panel. Read the approximate hFE value at the test condition of base current 10M and Vce 3V. .7- NOTE: To avoid electrical shock. remove test leads from measurement circuits before testing a transistor. AUDIBLE CONTINUITY TEST 1-. Connect red test lead to "V 0 mA'. black test lead to “COM”. 2. Set range switch to “'fil' position. 3. Connect test leads to two points of circuit to be tested. If continuity exists. built-in buzzer will sound. BATTERY 9. FUSE REPLACEMENT If " a ”appears on display. it indicates that the battery should be replaced. Fuse rarely need replacement and blow almost always as a result of operator's error. To replace battery & fuse (200mAi‘250V) remove the 2 screws in the bottom of the case. Simply remove the old. and replace with a new one. Be careful to observe battery polarity. A WARNING Before attempting to open the case, always be sure that test leads have been disconnected from measurement circuits. Close case and tighten screws completely before using the meter to avoid electrical shock hazard. ACCESSORIES - Operator’s instruction manual - Set of test leads 0 Gilt box 0 9 volt battery. NEDA 1604 6F22 ODGP type - Holster (option) ...
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