Arbiter Systems 931A, Operation Manual

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3.5.3 DC Voltage Measurement
The Model 931A can directly measure and display DC voltages of up to
1000 Vdc.
3.5.3.1 Input Connections
The Model 931A provides four connectors for measuring dc voltage.
Labeled “A”, “B”, “C”, and “N”, all four inputs use identical circuitry.
Additionally, input multiplexing circuitry allows referencing the voltage
across any two, voltage terminals. For example, to measure a voltage from
“A to N”, connect the leads between those two terminals.
NOTE: The Model 931A does not have a provision for measurement of
voltage between any of the voltage inputs and the chassis ground lug. Make
all voltage measurements between two (or more) of the voltage terminals.
The ground lug is included for safety purposes only.
3.5.3.2 Configuring the Channels
Configure the chosen measurement channel after connecting the voltage
to the appropriate input terminals. Configure Channel 1 by first pressing
the CHANNEL 1 SELECT key, and the following menu will appear on the
display:
Arrows form the cursor, and highlight one of the selections. Press the
arrow keys to locate the measurement value. For example, using the arrow
keys move the cursor to highlight Van to measure a DC voltage between
inputs “A” and “N” (“Van” is in the third row up from the bottom).
Confirm the selection by pressing ENTER.
3.5.3.3 Performing the Measurement
Press the VOLTS/AMPS key to display the measured DC voltage and
view a display similar to the one shown below:
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