Keysight N2790A User Manual page 12

Safety Information
WARNING
CAUTION
12
To clean the instrument. If the instrument requires cleaning: (1) Remove
power from the instrument. (2) Clean the external surfaces of the
instrument with a soft cloth dampened with a mixture of mild detergent
and water. (3) Make sure that the instrument is completely dry before
reconnecting it to a power source.
The probe cable and the extreme temperature extension cables are
sensitive parts and, therefore, you should be careful not to damage them
through excessive bending or pulling. Avoid any mechanical shocks to
this product in order to guarantee accurate performance and protection.
Keysight N2790A Differential Voltage Probe User Guide