Keysight Technologies B2961A User Manual page 10

• Source/Measure Terminals
This instrument can simultaneously perform DC voltage or current output and
measurement, and has the Force, Sense, and Guard terminals as shown below.
Normally the Force, Sense, and Guard are the same potential. Voltage marked around
the terminals indicates the Protection Limits.
Force and Sense must be connected to a terminal of a device under test (DUT) for the
4-wire connection (Kelvin connection) which is effective for applying voltage
accurately. For the 2-wire connection to ease the connections, connect Force only. Do
not connect Sense. It must be opened.
Guard should be connected to the guard shield which covers the DUT high side wiring
for reducing leakage current caused by the wire. Or else, the Guard must be opened.
Chassis ground (green terminal) should be connected to the ground shield which
covers the DUT including the guard shield to minimize the affect of noise. Or else, the
chassis ground should be opened.
The following image is the source and measurement terminals of Keysight B2961A/
B2962A. For the B2961A/B2962A, the High Force, High Sense, and Guard are the
same potential. And the Low Force and Low Sense are the same potential.
High Sense, for 4-wire connection
High Force
Guard
Chassis ground
Low Force
Low Sense, for 4-wire connection