With the above two points in mind what does this

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With the above two points in mind what does this suggest is the difference in the resistance of the DMM when measuring current and voltage? Why would it be important to have the resistance high when measuring voltage and the resistance low when measuring current? 7 ScienceWorkshop and DataStudio Throughout the quarter your primary tools for collecting and analyzing data will be the PASCO program DataStudio: Data Collection and Analysis Software and the accompanying suite of PASCO hardware. This section will cover the basic assembly and operation of the equipment. 7
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7.1 Hardware and Assembly The primary piece of equipment is the PASCO ScienceWorkshop 750 Interface , shown in Figure ?? . It’s purpose is to interface between the computer, your measurement probes and the PASCO Power Amplifier (which will act as your signal generator). Note on the front of the ScienceWorkshop are located three ”Analog Channels” labeled A through C. These connections are for your probes and signal generator. To set up the ScienceWorkshop make sure of the following: Its 12V AC adapter is plugged into a wall outlet as well as the appropriate plug on the back of the device. It is connected via USB cable to the computer at your lab bench. Figure 6: The PASCO ScienceWorkshop 750 Interface The second essential hardware component is the PASCO Power Amplifier (CI-6552A) , shown in Figure ?? . It will serve as a variable DC power supply and AC signal generator for the various circuits you will be studying. Its voltage output is in the range - 10 V +10 V and has a maximum current output of 1 A . It’s AC frequency range is 0 . 01 Hz 50 kHz . To properly connect the Power Amplifier do the following: Make sure it’s switched off prior to being plugged in. Plug the cord of its power supply into a standard wall outlet. Plug the 8-pin DIN cable into Analog Channel C on the ScienceWorkshop. Figure 7: The PASCO Power Amplifier The last components you will be using are the PASCO Voltage and Current Probes. The Voltage Probe consists of a DIN Analog connector at one end which splits into two wires with gator clips at the end. The Current Probe, as shown in Figure ?? , has two banana plug jacks located on top; to these connect banana plug wires. Plug the Voltage Probe into Analog Channel A and the Current Probe into Analog Channel B on the front of the ScienceWorkshop. When 8
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Figure 8: The PASCO Current Probe; plugs into the ScienceWorkshop (Analog Channel) using the Current Probe make note of the convention for positive current denoted on it; the probe has internal resistance of 1Ω which will contribute to any circuit in which it’s placed. Also note that it has a 1 . 5 A maximum allowable current, though since the Power Amplifer has a max output of 1 A this should not be an issue.
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