Technical data

Calibration Procedures 1
Constant Voltage (CV) Verifications
E3632A Service Guide 13
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.
CV line regulation
This test measures the immediate change in output voltage
that results from a change in AC line voltage from the
minimum value (10% below the nominal input voltage) to
maximum value (10% above the nominal input voltage).
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 Connect the AC power line through a variable voltage
transformer.
3 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
current to the maximum programmable value and the
voltage to full rated value (30.0 V).
4 Operate the electronic load in constant current mode and
set its current to 4.0 A. Check that the CV annunciator
remains lit. If not lit, adjust the load so that the output
current drops slightly until the CV annunciator lights.
5 Adjust the transformer to low line voltage limit (104 Vac
for nominal 115 Vac, 90 Vac for nominal 100 Vac, or
207 Vac for nominal 230 Vac). Record the output reading
on the digital voltmeter.