Keysight E3632A, Service Manual

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Calibration Procedures 1
Keysight E3632A Service Guide 27
Constant Voltage (CV) Verifications
Constant voltage test setup
If more than one meter or a meter and an oscilloscope are used, connect each to
the (+) and (–) terminals by a separate pair of leads to avoid mutual coupling
effects. Use a coaxial cable or shielded 2-wire cable to avoid noise pick-up on the
test leads.
Voltage programming and readback accuracy
This test verifies that the voltage programming and the GPIB or RS-232 readback
functions are within specifications. Note that the readback values over the remote
interface should be identical to those displayed on the front panel.
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 and enable the outputs
by sending the commands:
VOLT:RANG P30V
OUTP ON
3 Program the output voltage to zero volt and current to full rated value (4.0 A)
by sending the commands:
VOLT 0
CURR 4
4 Record the output voltage reading on the digital voltmeter (DVM). The reading
should be within the limits of 0 V ±10 mV. Note that the CV, Adrs, Limit, and
Rmt annunciators are on.
5 Readback the output voltage over the remote interface by sending the
command:
MEAS:VOLT?
NOTE
You should program the power supply over the remote interface for this test to
avoid round-off errors.