2Quick Start
42 Keysight E3633A and E3634A Service Guide
4 Enable the OVP circuit.
You will see the above message after pressing key.
5Exit the OVP menu.
The “CHANGED” message is highlighted for a second to show that the new
OVP trip level is now in effect. If the OVP settings are not changed, “NO
CHANGE” will be displayed. The power supply will exit the OVP menu and the
display will return to the meter mode. Check that the OVP annunciator turns
on.
Checking OVP operation
To check OVP operation, raise the output voltage to near the trip point. Then very
gradually increase the output by turning the knob until the OVP circuit trips. This
will cause the power supply output to drop to near zero, the OVP annunciator to
blink, and the CC annunciator to turn on. The “OVP TRIPPED” message also
appears on the display.
Clearing the overvoltage condition
When the OVP condition occurs (the “OVP TRIPPED” message is shown on the
display), the OVP annunciator blinks. When it was caused by an external voltage
source such as a battery, disconnect it first. Clear the overvoltage condition by
adjusting output voltage level or by adjusting OVP trip level.
The following steps show how to clear the overvoltage condition and get back to
normal mode operation. In the following steps, the display will go back to “OVP
TRIPPED” if you let the display time out after about several seconds.
OVP ON
CHANGED
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