CV load and line regulation
These tests verify that the voltage variation due to load or line variation are within specifications.
CV load regulation
This test measures the change in output voltage resulting from a change in output current from full load to no load.
1.
Turn off the power supply using the AC line switch.
2.
Connect the power supply output with a DMM and an electronic load.
3.
If you are using a PC 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.
5.
Set the power supply settings as described in the test record form under “CV Load Regulation”. See the
under “CV Load Regulation” for details. Enable the output.
6.
Operate the electronic load in constant current mode and set its current to the value in the test record form
under “CV Load Regulation”. See the
under Test Description of “CV Load Regulation” for
details. Check that the front panel CV annunciator of the power supply remains lit. If it turns to
CC
or
UR
,
adjust the load so that the output current drops slightly until the CV annunciator lights up. Record the output
voltage reading on the DMM as Vload.
7.
Operate the electronic load in open mode (input off). Record the output voltage reading on the DMM imme-
diately as Vnoload.
8.
Take the difference between the DMM readings in steps 6 and 7 that is the CV load regulation (Vload –
Vnoload). The difference of the readings during the immediate change should be within the specification limits.
20
Keysight EDU36311A Service Guide
