Open sense leads
The sense leads are part of the output's feedback path. Connect them in such a way so that they do not
inadvertently become open circuited. The power supply includes protection resistors that reduce the effect of open
sense leads during 4-wire-sensing. If the sense leads open during operation, the power supply returns to the local
sensing mode, with the voltage at the output terminals approximately 5% higher than the programmed value.
Over-voltage protection considerations
You must take into account any voltage drop in the load leads when setting the over-voltage trip point. This is
because the OVP circuit senses at the output terminals and not at the sense terminals. Due to the voltage drop in
the load leads, the voltage sensed by the OVP circuit could be higher than the voltage being regulated at the load.
Output noise considerations
Any noise picked up on the sense leads will appear at the output terminals and may adversely affect CV load
regulation. Twist the sense leads or use a ribbon cable to minimize the pickup of external noise. In extremely noisy
environments it may be necessary to shield the sense leads. Ground the shield at the power supply end only; do not
use the shield as one of the sensing conductors.
Keysight E36300 Series User's Guide
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