Keysight N6700C Series - Set the Over-Voltage Protection; Set the Over-Current Protection

Set the Over-Voltage Protection
Over-voltage protection disables the output if the output voltage reaches the programmed OVP level.
The OVP circuit monitors the voltage at the + and – output terminals.
For models N678xA SMU , the voltage is monitored at the + and – sense terminals rather
than at the output terminals. This allows for more precise over-voltage monitoring directly at the load.
Refer to Over-Voltage Protection Considerations for details. These models also have a back-up local
OVP function. Refer to Local OVP for a description of the feature. Additionally, for model N6784A, you
can program a negative over-voltage value. Enter the value in the -OVP field.
For models N678xA SMU and N6783A , you can specify a delay to prevent
momentary over-voltage excursions from tripping the over-voltage protection. Enter the value in the
over-voltage Delay field. These models also have negative voltage protection, which disables the
output if negative voltages are detected. Negative voltage protection is indicated by the OV-
annunciator.
On models with Option J01 , the voltage is also monitored at the + and – sense terminals.
This option also has tracking OVP in addition to the standard overvoltage protection. This lets you set
an overvoltage protection limit that is offset from the programmed voltage. The tracking OVP
threshold automatically tracks the real time programmed settings.
For models N69xA the over-voltage protection level is not programmable and is fixed at
110% of the rated input voltage.
Front Panel Menu Reference SCPI Command
Select Protect\OVP
Enter a value in the OVP level box and press
Select.
For J01 units, enter a value in the Tracking OVP
Offset box and check the Enable box. Then press
Select.
To set an OVP of 10 V for output 1:
VOLT:PROT 10, (@1)
For Models N678xA SMU:
VOLT:PROT:REM 10, (@1)
To enable tracking OVP for output 1:
VOLT:PROT:TRAC ON, (@1)
To set the tracking offset to 2V:
VOLT:PROT:TRAC:OFFS 2, (@1)
Set the Over-Current Protection
When over-current protection is enabled, the power system turns off the output if the output current
reaches the current limit setting and transitions from CV to CC operation.
Front Panel Menu Reference SCPI Command
Select Protect\OCP
Check Enable to enable OCP. Then press Select.
To enable OCP:
CURR:PROT:STAT ON, (@1)
Keysight N6700C Operating and Service Guide 155
4 Operating the Power System