5
Service Guide
64
Keysight U8001A/U8002A User’s and Service Guide
CV load effect (load regulation)
This test measures the change in the output voltage resulting from a change in
the output current from full load to no load or vice versa.
Procedures:
1
Power off the power supply and connect a DMM between the (+) and (–)
terminals of the output as shown in
.
2
Power on the power supply.
3
When the power supply is in limit mode, program the output voltage to full
rated value, i.e. 30 V and output current to the maximum programmable value.
4
Enable the output.
5
Operate the electronic load in constant current mode and set its current to 3 A
for U8001A and 5 A for U8002A. Ensure that the power supply is in CV mode. If
not, adjust the electronic load so that the current drops slightly until the power
supply is in CV mode.
6
Record the reading on the DMM.
7
Within a few seconds after step 6, operate the electronic load in open mode
and record the reading on the DMM.
8
Compare the reading obtained in steps 5 and 6. The difference should be
within the limit of 5 mV.
