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2 Installation
Remote Sense Connections
Wiring
Open Sense Leads
Over-Voltage Protection Considerations
Output Noise Considerations
Wiring
SHOCK HAZARD Turn off AC power before making rear panel connections.
Remote sensing improves the voltage regulation at the load by monitoring the voltage there instead of
at the output terminals. This allows the power system to automatically compensate for the voltage
drop in the load leads. Remote sensing is especially useful for CV operation with load impedances that
vary or have significant lead resistance. It has no effect during CC operation. Because sensing is
independent of other power system functions, remote sensing can be used regardless of how the
power system is programmed.
Connect the unit for remote sensing by first disconnecting the straps between sense and load
terminals. Make your connections as shown in the following figure. Connect the load to the output
terminals using separate connecting wires. Keep the wire-pair as short as possible and twist or bundle
it to reduce lead inductance and noise pickup. Keep load leads under 14.7 meters (50 feet) per lead
because of inductance effects.
Connect the sense leads as close to the load as possible. Do NOT bundle the sense wire-pair together
with the load leads; keep the load wires and sense wires separate. The sense leads carry only a few
milliamperes of current and can be a lighter gauge than the load leads. However, note that any
voltage drop in the sense leads can degrade the voltage regulation of the instrument. Keep the sense
lead resistance less than about 0.5 Ω per lead (this requires 20 AWG or heavier for a 50 foot length).
Keysight N6700C Series User's Guide
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