A multimeter or a multitester, also known as a VOM (Volt-Ohm meter or Volt-Ohm-milliammeter ), is
an electronic measuring instrument that combines several measurement functions in one unit. A typical
multimeter would include basic features such as the ability to measure voltage,current,
and resistance. Analog multimeters use a microammeter whose pointer moves over a scale
calibrated for all the different measurements that can be made. Digital multimeters (DMM, DVOM)
display the measured value in numerals, and may also display a bar of a length proportional to the
being measured. Digital multimeters are now far more common but analog multimeters are still
preferable in some cases, for example when monitoring a rapidly varying value.
