Agilent Technologies E364 A Series, User Manual

Page: 52 / 207

Chapter 3 Front-Panel Operation and Features
Programming Overvoltage Protection
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3
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 flash, 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
annunciator flashes. 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 you 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.
1 Lower the output voltage level below the OVP trip point.
The
OVP
and
Limit
annunciators are flashing after key is pressed.
2 Check that you lowered the voltage level below the OVP trip point.
The OVP trip point is displayed. Do not adjust the trip point at this step.
3 Select the OVP CLEAR mode by turning the knob.
4 Clear the overvoltage condition and exit this menu.
The
OVP
annunciator will not flash any more. The output will return to meter
mode.
By Adjusting output voltage level
OVP OVP OVP OVP ON ON ON ON
OVP
OVP OVP
OVP CLEAR
done
done done
done
Display
Limit
Display
Limit
Over
Voltage
Over
Voltage
Over
Voltage