Operation and Features 2
Keysight E364xA User’s and Service Guide 69
– By adjusting the OVP trip level
1 Raise the OVP trip level higher than the level tripped
2 Select the OVP Clear mode by turning the knob.
3 Clear the overvoltage cond ition and exit this menu.
The OVP annunciator will not flash any more. The output will return to the
meter mode.
Remote interface operation
OVP ON
OVP CLEAR
DONE
VOLT:PROT {<voltage>|MIN|MAX} Set the OVP level.
VOLT:PROT:STAT {OFF|ON) Disable or enable the OVP circuit.
VOLT:PROT:CLE Clear the tripped OVP circuit.
The power supply’s OVP circuit contains a crowbar SCR, which effectively shorts
the output of the power supply whenever the overvoltage condition occurs. If an
external voltage source such as a battery is connected across the output, and
the overvoltage condition inadvertently occurs, the SCR will continuously sink a
large current from the source and possibly damaging the power supply. To avoid
this, a diode must be connected in series with the output as shown in Figure 2-1.
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