Configuring Protection - Keysight N6705C Operating And Service Manual

3 Using the Source Functions

Configuring Protection

Protection functions are configured in the Protection Configuration window. Press the Settings key to
access the Source Settings window. Navigate to and select Protection. Then press Enter.
The Advanced button lets you configure the advanced protection functions.
Over Voltage Protection - Over-voltage protection disables the output if the output voltage reaches
the OVP level. To set the over-voltage protection, enter an over-voltage value in the +Level field.
For models N678xA SMU, the OVP circuit senses at the 4-wire 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 negative voltage
protection, which disables the output if negative voltages are detected. Note that for model N6784A,
you can program a negative over-voltage protection level. Enter the value in the -Level field.
For models 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.
Over Current Protection - With over-current protection enabled, the power analyzer disables the
output if the output current reaches the current limit setting, which causes a transition from CV to CC
mode. To enable over-current protection, check the Enable OCP box.
Note that you can also specify a Delay to prevent momentary CV-to-CC status changes from tripping
the over-current protection. The delay can be programmed from 0 to 0.255 seconds. You can specify if
the Start of the delay is initiated by any transition into CC mode, or only at the end of a settings change
in voltage, current, or output state. Refer to CC Mode Delay for more information.
All Outputs – the Status field shows the status of all outputs. This indicator also appears in the lower
left corner of each output in Meter View. When a protection function trips the power analyzer disables
the affected output and the status indicator shows which protection function was activated.
Clear All Outputs - To clear the protection function, first remove that condition that caused the
protection fault. Then select Clear All Outputs. This clears the protection function and returns the
output to its previous operating state.
Enable Output Coupling – Checking this box lets you couple the outputs so that when a protection
fault occurs on one output, ALL outputs will be turned off.
122 Keysight N6705C Operating and Service Guide