Technical data

Calibration Procedures 1
Constant Current (CC) Verifications
E3632A Service Guide 19
4 Operate the electronic load in constant voltage mode and
set its voltage to 15.0 V. Check that the CC annunciator
remains lit. If not lit, adjust the load so that the output
voltage drops slightly until the CC 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 current
reading by dividing the voltage reading on the digital
voltmeter by the resistance of the current monitoring
resistor.
6 Adjust the transformer to 10% above the nominal line
voltage (127 Vac for a 115 Vac nominal input, 110 Vac for
a 100 Vac nominal input or 253 Vac for a 230 Vac nominal
input). Record the current reading again immediately by
dividing the voltage reading on the digital voltmeter by
the resistance of the current monitoring resistor. The
difference between the current readings in step 5 and 6 is
the load regulation current. The difference of the readings
during the immediate change should be within the limit of
0.95 mA.
Normal mode current noise (CC ripple and noise)
The normal mode current noise is specified as the rms
output current in a frequency range 20 Hz to 20 MHz with
the power supply in constant current operation.
1 Turn off the power supply and connect the output to be
tested as shown in
Figure 1- 1 with a load resistor (2.1 Ω)
across output terminals to be tested. Connect a RMS
voltmeter across the load resistor. Use only a resistive
load for this test.
2 Turn on the power supply. Select the 15 V/7 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 full rated value (7.0 A) and the voltage to the
full rated value (15.0 V).