Chapter 3 Front-Panel Operation and Features
Programming Overvoltage Protection
50
Programming Overvoltage Protection
Overvoltage protection guards the load against output voltages reaching values
greater than the programmed protection level. It is accomplished by shorting
the output via an internal SCR when the trip level is set to equal or greater than
3 volts, or by programming the output to 1 volt when the trip level is set to less
than 3 volts.
The following steps show how to set the OVP trip level, how to check OVP
operation, and how to clear overvoltage condition.
• Front-panel operation:
Setting the OVP Level and Enable the OVP Circuit
1 Turn on the power supply.
2 Enter the OVP menu and set the desired trip level.
Use the knob and the resolution selection key or to set the desired
trip level. Note that you cannot set the trip levels to lower than 1.0 volt.
3 Enable the OVP circuit.
4 Exit the OVP menu.
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.
LEVEL 22
22
2.0V (E3640A)
OVP ON
CHANGED
Power
Over
Voltage
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Voltage
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Voltage
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