2-6 Connections 2400 Series SourceMeter
®
User’s Manual
Figure 2-3
Four-wire connections (remote sense)
NOTE Connections alone do not determine sense mode. For local sensing (Figure 2-2),
2-wire sensing must be selected from the SENSE MODE option of the
CONFIGURE V-SOURCE menu. For remote sensing (Figure 2-3), 4-wire
sensing must be selected. The 2-wire sense mode is the BENCH and GPIB
default. See “Sense selection,” page 2-11, for details.
4-wire remote sensing
When sourcing and/or measuring voltage, there can be errors associated with IR drops in
the test leads. Voltage source and measure accuracy are optimized by using 4-wire remote
sense connections. When sourcing voltage, 4-wire remote sensing ensures that the pro-
grammed voltage is delivered to the DUT. When measuring voltage, only the voltage drop
across the DUT is measured. Use 4-wire remote sensing for the following source-measure
conditions:
•Test circuit impedance is <1kΩ.
• Optimum Ohms, V-Source, and/or V-Measure accuracy are required.
NOTE Specified accuracies for both source and measure are only achieved using
4-wire remote sensing.
HI
LO
OUTPUT
INPUT/
OUTPUT
4-WIRE
SENSE
ON/OFF
TERMINALS
FRONT/
REAR
DUT
SourceMeter Front Panel Sense Selection: 4-wire
FRONT/
REAR
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