Checking Ocp Operation; Clearing The Overcurrent Condition - Agilent Technologies E3633A User Manual

Chapter 3 Front-Panel Operation
Programming Overcurrent Protection
Over
5 Exit the OCP menu.
Current
CHANGED
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

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
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.
• Adjust output current level
Display
1 Lower the output current level.
Limit
Press
lower the output current level below the OCP trip point.
Over
2 Move to the clear mode.
Current
OCP CLEAR
Press
appears on the display. Turn the knob to the right until the above message appears on
the display.
OCP
Display
key and set the knob for current control by pressing
Limit
Over
key twice to move to the OCP CLEAR mode. The "OCP ON" message
Current
annunciator turns on.
OCP
3
annunciator to
Voltage
key, then
Current
35