Agilent Technologies E3633A Checking OCP Operation, Clearing the Overcurrent Condition, Ocp Clear

Press OverCurrent

Over Current

Chapter 3 Front-Panel Operation

Programming Overcurrent Protection

5 Exit the OCP menu.

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 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.

3

Display

Limit

•Adjust output current level

1 Lower the output current level.

Press DisplayLimit key and set the knob for current control by pressing then lower the output current level below the OCP trip point.

CurrentVoltage key,

Over Current

2Move to the clear mode.

OCP CLEAR

key twice to move to the OCP CLEAR mode. The “OCP ON” message appears on the display. Turn the knob to the right until the above message appears on the display.

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