Measuring 4-Wire Resistance With Offset Compensation; Introduction; Equipment Required - Tektronix Keithley DMM7510 User Manual

Measuring 4-wire resistance with offset compensation

In this section:

Introduction .............................................................................. 6-1

Equipment required .................................................................. 6-1

Device connections .................................................................. 6-2
4-wire resistance measurements with offset compensation ..... 6-3
Introduction
This application example demonstrates how to use the DMM7510 to accurately measure a
resistance device.
To provide the best resistance measurement accuracy, the four-wire (Kelvin) measurement and the
offset compensation methods are used for this test. Offset compensation is a measuring technique
that reduces or eliminates thermoelectric electromotive forces (EMFs) in low-level resistance
measurements. The voltage offsets that occur because of the presence of thermoelectric
electromotive force (V
To overcome these offset voltages, you can use offset-compensated ohms.
Equipment required
•
One DMM7510
•
One computer setup for communication with the DMM7510
•
Four insulated banana cables, such as the Model 1756 General Purpose Test Lead Kit that is
provided with the DMM7510 (you will need a second set)
•
One device to be tested; the application shown here uses a 20 Ω resistor (actual resistance value
can vary with availability and user discretion)
) can adversely affect resistance measurement accuracy.
EMF
Section 6