Keysight N2790A User Manual page 16

Using the Probe
16
Figure 4 Connecting the Extreme Temperature Hook Tip Adapters
Or,
Connect the red and black extreme temperature banana-to-socketed
tip adapters to the extreme temperature differential extension cables
which are already connected to the existing probe cables.
Figure 5 Connecting the Extreme Temperature Banana-to-Socketed Tip Adapters
There is an over-range LED on the probe to indicate when you have
exceeded the maximum voltage of the probe.
Keysight N2790A Differential Voltage Probe User Guide