Measure Low Values of Resistance Using the Kelvin or Four Wire Connection (021)

There are times you have to be able to measure low value resistors. Sometimes these resistor values might be as low at 1 milliohm.

For resistor values below 10 Ohms, your standard DVM or VOM just cannot do the job.

The answer lay in using the Kelvin or Four-Wire Connection to make the measurement.
We can do this using simple shop instruments like your DVM.

We will walk through the planning and preparation for the measurement.

By way of example, I will also perform this measurement on a 10 milliohm resistor so you can see it done.

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Time Marker Notes
00:05 Introduction
01:02 Understanding the Foundations
04:31 What do we need to do this?
05:45 Measurement Planning
05:47 Planning: The Current Limit & Test Current
07:33 Planning: The Voltage Drop we have to measure
08:17 Planning: Measurement Accuracy
09:08 Planning: Load Resistor
09:13 Planning: Load Resistor Value & Test Voltage
10:37 Planning: Load Resistor Max Current/Power Dissipation
12:44 Test Setup
12:48 Test Setup: Preparing the Resistor to Test
13:27 Test Setup: Preparing the Test Equipment
14:17 Test Setup: Connecting Everything Up
15:22 Performing the Measurement
16:38 Calculating the Resistor Value
17:58 Final Comments and Toodle-Oots
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