Technical data

1 Calibration Procedures
Constant Current (CC) Verifications
18 E3632A Service Guide
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
output voltage to the maximum programmable value and
the output current to the full rated value (7.0 A).
3 Operate the electronic load in constant voltage mode and
set its voltage to 15.0 V. Check that the CC annunciator is
on. If it is not, adjust the load so that the output voltage
drops slightly. Record the current reading by dividing the
voltage reading on the digital voltmeter by the resistance
of the current monitoring resistor.
4 Operate the electronic load in short (input short) mode.
Record the current reading 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 3 and 4 is the load regulation
current. The difference of the readings during the
immediate change should be within the limit of 0.95 mA.
CC line regulation
This test measures the immediate change in output current
that results from a change in AC line voltage from the
minimum value (10% below the nominal input voltage) to the
maximum value (10% above nominal voltage).
1 Turn off the power supply and connect the output to be
tested as shown in
Figure 1- 1 with the digital voltmeter
connected across the current monitoring resistor (R
M
).
2 Connect the AC power line through a variable voltage
transformer.
3 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 ouput
voltage to the maximum programmable value and the
output current to the full rated value (7.0 A).