Keysight E3631A, Service Manual

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2 Quick Start
36 Keysight E3631A Service Guide
To check the rated currents of the power supply
The following procedures check to ensure that the power supply develops its
rated current outputs with a short and properly responds to operation from the
front panel.
1 Turn on the power supply.
The power supply will go into the power-on / reset state; all outputs are
disabled (the OFF annunciator turns on); the display is selected for the +6V
supply (the +6V annunciator turns on); and the knob is selected for voltage
control.
2 Connect a short across (+) and (–) output terminals of +6V supply with an
insulated test lead.
3 Enable the outputs.
The OFF annunciator turns off and the +6V annunciator turns on. The CV or CC
annunciator is lit depending on the resistance of the test lead. The blinking
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 Ad just the voltage limit value to 1.0 volt.
Set the display to the limit mode (the Lmt annunciator will be blinking). 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 for
the +6V supply.
Set the knob to the current control, and turn the knob clockwise or counter
clockwise when the display is in the meter mode (the Lmt 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).
6 Ensure that the current can be adjusted from zero to the maximum rated
value .
Adjust the knob until the ammeter indicates 0 amps and then until the
ammeter indicates 5.0 amps.