Multimeter
A multimeter or a multitester is an electronic measuring tool that is a combination of several tools in one unit. It usually includes an ammeter, voltmeter, and ohmmeter. Digital multimeters are sometimes called DMM too.
Modern multimeters can be used to measure electrical quantities other than current, resistance and voltage. For example, they can be used to measure frequency, capacitance, transistors Hfe and temperature.
The multimeter can make many tests, so it is often called "multitester". When measuring resistance it acts as an ohmmeter, showing ohms. For volts it would be a Voltmeter. Sometimes it is called a mixture of things like Volt/ohm meter or VOM. Most meters can measure volts, amps, and resistance.[1]
How it can be measured
The multimeter can be used to measure the voltage of a battery. It can also be used for measuring the voltage across two points in a circuit. The Voltmeter is placed in parallel between the positive and negative terminals of the battery. It can also be used to measure resistance and amps hence the name of some meters "Voltmeter, Ohmmeter, and Amperage".[2]
Multimeter Media
YX360TRF (Sanwa Analog Multimeters or Multimeters) / Made In Japan / Drop proof mutitester.
1920s pocket multimeter. 33 ohms per volt, moving iron mechanism, no zero adj, one current and 2 voltage scales.
AVO Model 8 Mk7, manufactured until 2008 - multimeter AVO (Amps, Volts and Ohms)
A pocket-watch-style meter made in the 1930s. It can measure voltage, current, continuity and the heating element of vacuum tubes
Clamp meter AC/DC, type Fluke 337. Measuring range 0 to 999.9 A.
Inexpensive analog multimeter with a galvanometer needle display
Benchtop Multimeter. Hewlett-Packard 34401A.
USB-powered multimeter for examining battery charging of portable electronics
A 41⁄2-digit digital multimeter
Electronic multimeter test leads.
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References
- ↑ "multimeter". Archived from the original on 3 May 2013. Retrieved 29 May 2012.
- ↑ "multimeters" (PDF). Archived from the original (PDF) on 2010-06-05. Retrieved 29 May 2012.
Other websites
- Multimeter Tutorial - Lots of useful information on Digital multimeter usage.