Tektronix Keithley SourceMeter 2470 Reference Manual page 130

Section 4: Sourcing and measuring
You can use 2-wire, or local sensing, measurement techniques for these source-measure conditions:
•
Sourcing and measuring low current.
•
Sourcing and measuring voltage in high impedance (more than 1 kΩ) test circuits.
•
Measure-only operation (voltage or current).
When you use 2-wire sensing, voltage is sensed at the output connectors.
You should only use 2-wire connections if the error contributed by test-lead IR drop is acceptable.
Two-wire local sense connections
Two-wire connections are shown in the following figures.
If your application results in impedances above 1 GΩ, you may also need to use guarding. This
prevents leakage current from affecting measurement accuracy. For information, see
page 5-15).
To use 2-wire connections, you must set the sense mode of the instrument to 2-wire, as described in
the following topics.
Two-wire local sense connection drawings
4-8
2470 High Voltage SourceMeter Instrument Reference Manual
Figure 56: Model 2470 2-wire front-panel connections
Guarding (on
2470-901-01 Rev. A / May 2019