2Quick Start
32 Keysight E3633A and E3634A Service Guide
To Check the Rated Currents of the Power Supply
The following steps check basic current functions with a short across the power
supply’s output.
1 Turn on the power supply.
The power supply will go into the power-on / reset state; the output is disabled
(the OFF annunciator turns on); the 8V/20A
[1]
or 25V/7A
[2]
range is selected
(the 8V
[1]
or 25V
[2]
annunciator turns on); and the knob is selected for voltage
control.
2 Connect a short across (+) and (-) output terminals with an insulated test
lead.
3 Enable the output
The OFF annunciator turns off and the 8V
[1]
or 25V
[2]
, OVP, and OCP
annunciators turn on. The CV or CC annunciator is lit depending on the
resistance of the test lead. The flashing digit can be adjusted by turning the
knob. Notice that the display is in the meter mode. “Meter mode” means that
the display shows the actual output voltage and current.
4 Adjust the voltage limit to 1.0 volt
Set the display to the limit mode (the Limit annunciator will be flashing).
Adjust the voltage limit to 1.0 volt to assure CC operation. The CC annunciator
will light.
5 Check that the front-panel ammeter properly responds to knob control.
Set the knob to the current control, and turn the knob clockwise or counter
clockwise when the display is in the meter mode (the Limit annunciator is off).
Check that the ammeter responds to knob control and the voltmeter indicates
nearly zero (actually, the voltmeter will show the voltage drop caused by the
test lead)
[1] For Keysight E3633A Model
[2] For Keysight E3634A Model
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