Tektronix Keithley 2651A Reference Manual page 58

Model 2651A High Power System SourceMeter® Instrument Reference Manual
Voltmeter and ammeter measurements
You can make voltmeter and ammeter measurements without using the MODE key, such as when
configuring measure-only tests over the remote interface.
To use the Model 2651A to measure voltage or current:
1. Select the source-measure functions:
▪
Voltmeter: Press the SRC key to select the current source and press the MEAS key to select
the voltage measurement function.
▪
Ammeter: Press the SRC key to select the voltage source and press the MEAS key to select
the current measurement function.
2. Set source and compliance levels. To edit the source level, use the procedure provided in
Select and set the source level
provided in
▪
Select the lowest source range and set the source level to zero.
▪
Set the compliance level to a value that is higher than the expected measurement.
When using the Model 2651A as a voltmeter, the voltage compliance limit must be set higher
than the voltage that is being measured. Failure to do this could result in excessive current
flow into the Model 2651A (<100 A), incorrect measurements, and possible damage to the
instrument.
3. Use the RANGE keys to select a fixed measurement range that accommodates the expected
reading. Use the lowest possible range for best accuracy. You can also select autorange, which
automatically sets the Model 2651A to the most sensitive range.
4. Connect the voltage or current to be measured. Make sure to use 2-wire connections from the
Model 2651A to the device under test (DUT) (see
5. Press the OUTPUT ON/OFF control to turn the output on.
6. View the displayed reading (press the TRIG key if necessary).
7. When finished, press the OUTPUT ON/OFF control to turn the output off.
2651A-901-01 Rev. C October 2021
(on page 2-27); to edit the compliance level, use the procedure
Step 2: Set the compliance limit (on page 2-28):
DUT test connections
Section 2: General operation
Step 1:
(on page 2-45)).
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