2606B System SourceMeter® Instrument Reference Manual
Section 2: General operation
2606B-901-01 Rev. B / May 2018
2-57
2-wire local sensing connections
You can use 2-wire local sensing measurements, shown in the following figure, for the following
source-measure conditions:
•
Sourcing and measuring current.
•
Sourcing and measuring voltage in high impedance (more than 1
kΩ) test circuits.
When using 2-wire local sensing connections, make sure to properly configure the 2606B
(on page 2-64).
Figure 30: Two-wire resistance connections
4-wire remote sensing connections
When sourcing and/or measuring voltage in a low-impedance test circuit, there can be errors
associated with lead resistance. 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.
When sourcing voltage in remote sense, make sure the sense leads are connected to the DUT. If a
sense lead becomes disconnected, an erroneous voltage will be sensed, and the 2606B may
increase the output voltage to compensate. You can use contact check to verify that the sense leads
are connected. Refer to
(on page 2-50).
