A multimeter or a multitester, also known as a VOM (Volt-Ohm meter), is an electronic measuring instrument that combines several measurement functions in one unit.
A typical multimeter may include features such as the ability to measure voltage, current, and resistance.
Multimeters may use analog or digital circuits. Analog multimeters are abbreviated as AMM and digital multimeters as DMM or DVOM.
Click on each button to find out more about analog and digital instruments:
Analog instruments are usually based on a microammeter whose pointer moves over a scale calibrated for all the different measurements that can be made.
Digital instruments usually display digits, but may display a bar of a length proportional to the quantity being measured.
A multimeter can be a hand-held device useful for basic fault-finding and field service work, or a bench instrument which can measure to a very high degree of accuracy.
It can be used to troubleshoot electrical problems in a wide array of industrial and household devices such as electronic equipment, motor controls, domestic appliances, power supplies, and wiring systems.
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