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n. An electronic measuring instrument that combines multiple functions; a combined voltmeter, ammeter and ohmmeter.


A multimeter or a multitester, also known as a VOM (Volt-Ohm-Milliammeter), is an electronic measuring instrument that combines several measurement functions in one unit. A typical multimeter can measure voltage, current, and resistance. Analog multimeters use a microammeter with a moving pointer to display readings. Digital multimeters (DMM, DVOM) have a numeric display, and may also show a graphical bar representing the measured value. Digital multimeters are now far more common due to their cost and precision, but analog multimeters are still preferable in some cases, for example when monitoring a rapidly varying value.

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. They 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.

Multimeters are available in a wide range of features and prices. Cheap multimeters can cost less than US$10, while laboratory-grade models with certified calibration can cost more than US$5,000.

Usage examples of "multimeter".

He had his multimeter on the edge of the control panel and was busily switching around the probe leads.

The more Nifty Gift looked at the readings on his little multimeter, the more strongly they suggested to him that something about the drive must be marginally off.

I opened my kit, took out a multimeter and a set of probes, and began a preliminary check of the panel itself.

He fumbled for the multimeter, opened the Environmental Control cabinet, and troubleshooted as Mission Control directed.

MiG, then the chief broke out a multimeter and started taking readings.

While I took the inverter apart and assaulted it with multimeter probes, I asked Mr.

The linemen had fussed with multimeters and muttered about impedances and capacitances.

The linemen had fussed with multimeters and muttered about impedances and capacitances.