Essential Instrument

Multimeter — Measure Voltage, Current & Resistance

A multimeter is a versatile electrical instrument used to measure voltage, current, and resistance, available in analog and digital forms.

Quick facts
Voltage
AC/DC
Current
mA to A ranges
Resistance
Ohms
Multimeter image

What is a multimeter

A multimeter combines voltmeter, ammeter and ohmmeter functions into one handheld instrument.

Types

  • Analog — needle display, useful for trends and slow changes.
  • Digital — numeric readout, higher precision and features.

How to use

  1. Set range and function (V, A, Ω).
  2. Connect probes: red to positive, black to common.
  3. Measure with correct mode (AC vs DC) and range.

Safety tips

  • Always start with highest range when unsure.
  • Use proper category-rated meter and probes for high voltage.
  • Disconnect power when measuring resistance or continuity.