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