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This setup is used for most tests and it requires the DMM, electronic load, and power supply being verified. Some
wire is also required for connection between instruments. A LAN or USB cable is needed for readback data. The
DMM measures the power supply output, and the electronic load draws current from the power supply. The
accuracy of the current monitoring resistor must be 0.01% or better, which should include any self-heating effects.
Constant Voltage (CV) verification
Voltage programming and readback accuracy
These tests verify that the voltage programming and the LAN or USB readback functions are within specifications.
Note that the readback values over the remote interface should be identical to those displayed on the front panel,
but with maximum resolution.
1.
Turn off the power supply using the AC line switch.
2.
Connect a DMM between the (+) and (–) terminals of the output.
3.
If you are using a computer to control the power supply, connect a LAN or USB cable from the power supply to
the PC.
4.
Turn on the power supply using the AC line switch.
Voltage programming accuracy
Step
Front panel
SCPI
5.
Set the instrument settings as described in the test record form under the Voltage
Programming and Readback. See
for details.
VOLT 6; CURR 5 (for example for
the E36102B, 6 V, 5 A output)
6.
Enable the output by pressing the Output ON key.
OUTP ON
7.
The output status should be
CV
and the output current should be close to zero.
8.
Record the voltage measured by the DMM and verify whether it is within the limits calculated.
Voltage readback accuracy
Step
Front panel
SCPI
9.
MEAS:VOLT? (for example for the
E36102B, 6 V, 5 A output)
10.
Record the voltage returned by the SCPI command query via Keysight Connection Expert, and verify whether it
is within the limits calculated.
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Keysight E36100B Series Operating and Service Guide