Voltmeter
Videos
A voltmeter is an instrument used for measuring electric potential difference between two points in an electric circuit. It is connected in parallel. It usually has a high resistance so that it takes
Demonstration analog voltmeter
Two digital voltmeters. Note the 40 microvolt difference between the two measurements, an offset of 34 parts per million.
Multimeter
Videos
A multimeter is a measuring instrument that can measure multiple electrical properties. A typical multimeter can measure voltage, resistance, and current, in which case can be used as a voltmeter, ohm
Voltmeter
…are used to monitor generators or other fixed apparatus. Portable instruments, usually equipped to also measure current and resistance in the form of a multimeter are standard test instruments used in electrical and electronics work. Any measurement that can be converted to a voltage can be displayed on a meter…
Analog multimeter
Digital multimeter
1920s pocket multimeter
Avometer Model 8