Tektronix Keithley SourceMeter 2450 - Section 5 Measuring Low-Resistance Devices; Introduction and Equipment

In this section:
Introduction ............................................................................... 5-1
Equipment required .................................................................. 5-1
Set up remote communications ................................................ 5-2
Device connections .................................................................. 5-2
Low-resistance measurements ................................................. 5-5
Introduction
This application example demonstrates how to use the 2450 to measure a low-resistance device.
You may need to make low-resistance measurements (<10 Ω) in a number of applications. Typical
applications include continuity testing of cables and connectors, substrate vias, and resistors.
Typically, you make these resistance measurements by forcing a current and measuring the resulting
voltage drop. The 2450 automatically calculates the resistance. The measured voltage is usually in
the mV range or less. Built-in features of the 2450 optimize low-resistance measurements, such as
remote sensing and offset compensation.
Equipment required
• One 2450 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 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 mΩ resistor
Section 5
Measuring low-resistance devices