Checking Ovp Operation; Clearing The Overvoltage Condition - Agilent Technologies E3633A User Manual

Chapter 3 Front-Panel Operation
Programming Overvoltage Protection
Over
5 Exit the OVP menu.
Voltage
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

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
the
CC
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
Display
1 Lower the output voltage level.
Limit
Lower the output voltage level below the OVP trip point after pressing
The
Over
2 Move to the clear mode.
Voltage
OVP CLEAR
Press
appears on the display. Turn the knob to the right until the above message appears on
the display.
annunciator to turn on. The "OVP TRIPPED" message also appears on the
and annunciators are blinking.
OVP Limit
Over
key twice to move to the OVP CLEAR mode. The "OVP ON" message
Voltage
annunciator turns on.
OVP
annunciator to blink, and
OVP
3
Display
key.
Limit
31