2600S-901-01 Rev. C / January 2008 Return to Section Topics 3-7
Series 2600 System SourceMeter® Instruments Reference Manual Section 3: DUT Test Connections
4-wire remote sensing
When sourcing and/or measuring voltage in a low-impedance test circuit (see Figure 3-6), 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 programmed 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:
• Sourcing and/or measuring voltage in low impedance (<1kΩ) test circuits.
• Enforce voltage compliance limit directly at the DUT.
Figure 3-6
Model 2602/2612 four-wire connections
<1kW
S LO
DUT
LO
CHANNEL A
LO GLO HI G G G HI
SS
KEITHLEY Series 2600
HI
S HI
Model 2636 four-wire connections (remote sensing)
(remote sensing)
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