Keysight E3632A - CV Load Regulation

1 Calibration Procedures
28 Keysight E3632A Service Guide
6 Record the value displayed on the controller. This value should be within the
limits of DVM ±5 mV.
7 Program the output voltage to full rated value (30.0 V) by sending the
command.
VOLT 30.0
8 Record the output voltage reading on the digital voltmeter (DVM). The
readings should be within the limits of 30 V ±25 mV.
9 Readback the output voltage over the remote interface by sending the
command:
MEAS:VOLT?
10 Record the value displayed on the controller. This value should be within the
limits of DVM ±20 mV.
CV load regulation
This test measures the immediate change in the output voltage resulting from a
change in the output current from full to no load.
1 Turn off the power supply and connect a digital voltmeter between the (+) and
(–) terminals of the output to be tested as shown in Figure 1-1.
2 Turn on the power supply. Select the 30 V/4 A range, enable the output, and
set the display to the limit mode. When the display is in the limit mode,
program the output current to the maximum programmable value and the
voltage to the full rated value (30.0 V).
3 Operate the electronic load in constant current mode and set its current to 4.0
A. Check that the front panel CV annunciator remains lit. If not lit, adjust the
load so that the output current drops slightly until the CV annunciator lights.
Record the output voltage reading on the digital voltmeter.
4 Operate the electronic load in open mode (input off). Record the output
voltage reading on the digital voltmeter immediately. The difference between
the digital voltmeter readings in steps 3 and 4 is the CV load regulation. The
difference of the readings during the immediate change should be within the
limit of 5 mV.