In this section:
Introduction .............................................................................. 5-1
Equipment required .................................................................. 5-1
Device connections .................................................................. 5-1
Low-resistance measurements ................................................ 5-4
Introduction
This example demonstrates how to use the Model 2450 to measure a low-resistance device.
You may need to make low-resistance measurements (<10
Ω
) in a number of applications, including
continuity testing of cables and connectors, substrate vias, and resistors. These resistance
measurements are typically made by forcing a current and measuring the resulting voltage drop. The
Model 2450 automatically calculates the resistance. The measured voltage is usually in the mV range
or less. The Model 2450 has built-in features that optimize low-resistance measurements, such as
remote sensing and offset compensation.
Equipment required
•
One Model 2450 Interactive SourceMeter
®
instrument
•
For front-panel connections, use four insulated banana cables, such as the Keithley Instruments
Model 8608 High Performance Clip Lead Set (one set included with the Model 2450; you will
need another set)
•
For rear-panel connections, use four triaxial cables
•
One low-resistance device to be tested; the application shown here uses a 20 m
Ω
resistor
Detailed instructions for setting up the Model 2450 for lower resistance measurements are in the
following paragraphs.
Device connections
To provide the best measurement accuracy, use the four-wire (Kelvin) measurement method for this
test. This method eliminates the effects of lead resistance on the measurement accuracy and is the
preferred method when measuring low resistances.
Section 5
Measuring low-resistance devices
