2Quick Start
38 Keysight E3633A and E3634A Service Guide
4 Adjust the knob for the desired voltage limit.
Check that the Limit annunciator still blinks and the second digit of voltmeter
blinks to indicate the knob is selected for voltage control.The blinking digit can
be changed using the resolution keys and the blinking digit can be adjusted by
turning the knob. Adjust the knob for the desired voltage limit.
5 Adjust the knob for the desired output current.
Check that the Limit annunciator still blinks. Set the knob for current control.
The second digit of the ammeter will be blinking. Change the blinking digit
using the resolution selection keys and adjust the knob to the desired output
current.
6 Return to the meter mode.
Press key or let the display time-out after several seconds to return to
the meter mode. Notice that the Limit annunciator turns off and the display
shows “OUTPUT OFF” message.
7 Enable the output.
The OFF annunciator turns off and the 8V
[1]
(or 25V
[2]
) or 20V
[1]
(or 50V
[2]
),
OVP, OCP and CC annunciators are lit. Notice that the display is in the meter
mode. In the meter mode, the display shows the actual output voltage and
current.
8 Verify that the power supply is in the constant current mode.
If you operate the power supply in the constant current (CC) mode, verify that
the CC annunciator is lit. If the CV annunciator is lit, choose a higher voltage
limit.
[1] For Keysight E3633A Model
[2] For Keysight E3634A Model
During actual CC operation, if a load change causes the voltage limit to be
exceeded, the power supply will automatically crossover to constant voltage
mode at the preset voltage limit and the output current will drop
proportionately.
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