When you need a multimeter for testing electrical equipment around the home, it's vital to know what all those symbols around the dial mean.

A voltmeter and ammeter are to an electrical system what a pressure gauge and a flow gauge are to an oil pressure system: A voltmeter measures electrical pressure in volts; ...

If you’re interested in how the circuitry for a voltmeter, ohmmeter, or ammeter might work, ... * However, the current version of the meter does not include a PTC [11].

If you want to measure voltage you reach for a voltmeter. Current? An ammeter. Resistance? An ohmmeter. But what about measuring AC power? A watt meter? Usually. But if you know what to do, you cou… ...

This article was originally published with the title “ The Construction of a Voltmeter and Ammeter Suitable for a Small Switchboard ” in SA Supplements Vol. 47 No. 1215supp (April 1899), p ...