Service and Maintenance 8
E364xA User’s and Service Guide 211
1 Turn off the power supply and connect the output to be tested as shown in
Figure 8-1 to an oscilloscope (AC-coupled) between the (+) and (–) terminals.
Set the oscilloscope to the AC mode and bandwidth limit of 20 MHz. Connect
a resistive load (13.5 Ω)
[1]
to the terminal at (B) as shown in Figure 8-3.
2 Turn on the power supply. Select the high voltage range (20 V/1.5 A)
[2]
, enable
the output, and set the display to the limit mode. When the display is in the
limit mode, program the current to the full-scale rated value (1.5 A)
[2]
and the
voltage to the full-scale rated value (20.0 V)
[2]
.
3 Check that the front panel CV annunciator remains lit. If it is not lit, adjust the
load down slightly.
4 Note that the waveform on the oscilloscope does not exceed the peak-to-peak
limit of 5 mV
[3]
or 8 mV
[4]
.
5 Disconnect the oscilloscope and connect the AC rms voltmeter in its place
according to the Vrms measurement techniques above and as shown in
Figure 8-3. The rms voltage reading does not exceed the rms limit of 0.5 mV
[3]
or 1 mV
[4]
.
[1] For the E3640A model. For other models, refer to Table 8-4.
[2] For the E3640A model. For other models, refer to Table 8-5.
[3] For the E3640A/E3642A/E3644A model.
[4] For the E3641A/E3643A/E3645A model.
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