Keithley SourceMeter 2600 Series Reference Manual page 121

Series 2600 System SourceMeters Reference Manual
Sensing methods
Source-measure operations are performed using either 2-wire local sense
connections or 4-wire remote sense connections.
NOTE
2-wire local sensing
Two-wire local sensing (as shown in
source-measure conditions:
•
•
Figure 3-4
2-wire connections (local sense)
4-wire remote sensing
When sourcing and/or measuring voltage in a low-impedance test circuit (see
ure 3-5), 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:
•
•
The default sense setting is 2-wire local. See
tion" later in this section to check and or change the sense mode.
Sourcing and measuring current.
Sourcing and/or measuring voltage in high impedance (>1kΩ) test circuits.
Sourcing and/or measuring voltage in low impedance (<1kΩ) test circuits.
Enforce voltage compliance limit directly at the DUT.
Return to
DUT Test Connections 3-5
Figure 3-4) can be used for the following
Section 3 topics 2600S-901-01 Rev. A / May 2006
"Sense mode selec-
Fig-