Test Equipment - Clamp Meters

How a clamp meter works and how to use one.

The Video

View this video on Youtube.

Old and New

This video demonstrates the use of a modern clamp meter.

Clamp meters are used to measure the current flowing in a conductor without having break the circuit or make direct contact with that conductor.

Also features two much older examples - a Ferranti tong tester and a Weston Clipper.


Unless specifically designed for such things, clamp meters: