Keysight E3631A, Service Manual

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Quick Start 2
Keysight E3631A Service Guide 35
To check the rated voltages of the power supply
The following procedures check to ensure that the power supply develops its
rated voltage outputs with no load 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 Enable the outputs.
The OFF annunciator turns off and the +6V and CV annunciators are lit. 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.
3 Check that the front-panel voltmeter properly responds to knob control for
+6V supply .
Turn the knob clockwise or counter clockwise to check that the voltmeter
responds to knob control and the ammeter indicates nearly zero.
4 Ensure that the voltage can be adjusted from zero to the maximum rated
value.
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Adjust the knob until the voltmeter indicates 0 volts and then adjust the knob
until the voltmeter indicates 6.0 volts.
5 Check the voltage function for the +25V supply.
Select the meter and adjust selection key for the +25V supply. The CV
annunciator is still lit and the +25V annunciator will turn on. Repeat steps (3)
and (4) to check the voltage function for the +25V supply.
6 Check the voltage function for the –25V supply.
Select the meter and adjust selection key for the –25V supply. The CV
annunciator is still lit and the –25V annunciator will turn on. Repeat steps (3)
and (4) to check the voltage function for the –25V supply.
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You can use the resolution selection keys to move the blinking digit to the right
or left when setting the voltage.