Agilent Technologies E364XA Series, Руководство пользователя

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Appendix Service Information
Constant Voltage (CV) Verifications
180
5
Readback the output voltage over the remote interface by sending the
command:
MEAS:VOLT?
6 Record the value displayed on the controller. This value should be within the
limit of (DVM ±5 mV) for output1 or (DVM ±25 mV) for output2.
7
Program the output voltage to full scale rated value (20 V)
†
by sending the
command:
VOLT 20.0 (E3646A model)
8 Record the output voltage reading on the digital voltmeter (DVM). The reading
should be within the limit of (20 V ± 20 mV)* or (60 V ± 40mV)** for output1,
or (20 V ± 45 mV)* or (60 V ± 85mV)** for output2.
9 Readback the output voltage over the remote interface by sending the
command:
MEAS:VOLT?
10 Record the value displayed on the controller. This value should be within the
limit of (DVM ± 15 mV)* or (DVM ± 35mV)** for output1, or (DVM ± 45 mV)*
or (DVM ± 85 mV)** for output2.
11
Repeat steps (1) through (10) for the other output.
CV Load Effect (Load Regulation)
This test measures the change in the output voltage resulting from a change in
the output current from full to no load.
1 Turn off the power supply and connect a digital voltmeter between the (+) and
(-) terminals of the output as shown in Figure A-1.
2
Turn on the power supply. Select the output to be tested and the high voltage
range (20V/1.5A)
†
, enable the output, and set the display to the limit mode.
When the display is in the limit mode, program the output current to the full
scale rated value (1.5A)
†
and the voltage to the full rated value (20.0 V)
†
.
3 Operate the electronic load in constant current mode and set its current to the
(1.5 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.
*For E3646A/48A models. **For E3647A/49A models.
†
For E3646A model, and see
Table A-3
for other models
.