Constant Voltage (CV) verification
Voltage programming and readback accuracy
This test verifies that the voltage programming and the LAN, USB, or GPIB 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.
This test verifies that the voltage programming and measurement functions are within specifications.
High range
1.
Turn off the electronic load.
2.
Connect a DMM across the sense terminals and an external power supply across the input terminals (see
3.
Turn on the electronic load and program the load settings as described in the test record form for “Voltage
Programming & Readback - High range, Minimum voltage”. Turn on the power supply and program it to the
power supply settings described in the test record form.
4.
Turn the load input on. The load status should be “CV” and the input current should be close to power supply
current.
5.
Record the voltage reading from the DMM and the voltage measured over the interface. The readings should be
within the limits specified in the test record form for the appropriate model under “Voltage Programming &
Readback - High range, Minimum voltage”.
6.
Program the load settings as described in the test record form for “Voltage Programming & Readback - High
range, Maximum voltage”.
7.
Record the voltage reading from the DMM and the voltage measured over the interface. The readings should be
within the limits specified in the test record form for the appropriate model under “Voltage Programming &
Readback - High range, Maximum voltage”.
Low range
8.
Program the load settings as described in the test record form for “Voltage Programming & Readback - Low
range, Minimum voltage”. Turn on the power supply and program it to the power supply settings described in
the test record form.
9.
Turn the load input on. The load status should be “CV” and the input current should be close to power supply
current.
10.
Record the voltage reading from the DMM and the voltage measured over the interface. The readings should be
within the limits specified in the test record form for the appropriate model under “Voltage Programming &
Readback - Low range, Minimum voltage”.
11.
Program the load settings as described in the test record form for “Voltage Programming & Readback - Low
range, Maximum voltage”.
12.
Record the voltage reading from the DMM and the voltage measured over the interface. The readings should be
within the limits specified in the test record form for the appropriate model under “Voltage Programming &
Readback - Low range, Maximum voltage”.
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Keysight EL30000 Series Service Guide
