Technical data

8 Service and Maintenance
Constant Voltage (CV) Verifications
188 E364xA User’s and Service Guide
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 8- 1.
2 Turn on the power supply. Select the high voltage range
(20 V/1.5 A)
[1]
and enable the output by sending the
following commands:
VOLT:RANG P20V (E3640A model)
OUTP ON
3 Program the output voltage to 0 V and current to the
full- scale rated value (1.5 A)
[1]
by sending the following
commands:
VOLT 0
CURR 1.5 (E3640A model)
4 Record the output voltage reading on the digital voltmeter
(DVM). The reading should be within the limit of
0 V ± 10 mV. Also, note that the CV, Adrs, Limit, and Rmt
annunciators are turned on.
5 Read back the output voltage over the remote interface by
sending the MEAS:VOLT? command.
6 Record the value displayed on the controller. This value
should be within the limit of DVM ±5 mV.
7 Program the output voltage to the full- scale rated value
(20 V)
[1]
by sending the following command:
VOLT 20.0 (E3640A model)
8 Record the output voltage reading on the digital voltmeter
(DVM). The reading should be within the limit of
20 V ± 20 mV
[2]
or 60 V ± 40 mV
[3]
.
9 Read back the output voltage over the remote interface by
sending the MEAS:VOLT? command.
10 Record the value displayed on the controller. This value
should be within the limit of DVM ± 15 mV
[2]
or
DVM ± 35 mV
[3]
.
[1] For the E3640A model. For other models, refer to Tabl e 8 -5 .
[2] For the E3640A/E3642A/E3644A model.
[3] For the E3641A/E3643A/E3645A model.