2.2 Using a DVOM or DMM, and what is it anyhow?

Way back at the beginning of the book, I promised to show you how to test the cables you create. To do this, we’d typically use a gadget called a ‘digital volt-ohm-milliammeter’. Since saying that whole name repeatedly quickly becomes tedious, we use the acronym DVOM. It is also called a DMM, for digital multi-meter. Both names are good, describing the unit accurately. The older version of this meter, with the swinging needle, was called a VOM, as it’s not digital.

I’ll show you one of these shortly, and also give a detailed description of some of its typical functions. But before I get so specific, I’d like to explain why you might want to use a DVOM to help you in your work.

All DVOMs ...

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