Agilent Technologies N6700 manual Remote Sense Connections

Installation 2

Remote Sense Connections

WARNING SHOCK HAZARD Turn off AC power before making or changing 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.

12A & 20 A	+S	+	-S
CONNECTOR
TWIST
PAIR			TWIST
			LEADS
	+	LOAD

+

+

LOAD

50A CONNECTOR

50A SENSE

+S +LS -LS -S

TWIST

PAIR

	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 sense leads as close to the load as
	possible. Refer to the “Wire Size” section for information about
	selecting the proper wire size. Best results are obtained by using the
	shortest load leads practical. It is recommended to keep load leads
	under 14.7 meters (50 feet) per lead because of inductance effects.
	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. Try to keep the sense lead resistance less than about
	0.5Ω per lead (this requires 20 AWG or heavier for a 50 foot length).
	When remote sensing on power modules with the 50A sense connector, do not
CAUTION
	connect the +LS and –LS terminals. These are dedicated for local sensing only.

Series N6700 User’s Guide 29