Agilent Technologies E3633A Checking OVP Operation, Clearing the Overvoltage Condition, Changed

Press OverVoltage

Over Voltage

Display

Limit

Over Voltage

Chapter 3 Front-Panel Operation

Programming Overvoltage Protection

5 Exit the OVP menu.

CHANGED

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.

•Adjust output voltage level

1 Lower the output voltage level.

Lower the output voltage level below the OVP trip point after pressing DisplayLimit key. The OVP and Limit annunciators are blinking.

2Move to the clear mode.

OVP CLEAR

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

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