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
EMF
) can adversely affect resistance measurement accuracy.
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)
Section 6
Measuring 4-wire resistance with offset compensation
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