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Multimeter
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Also called: DMM
Plain-language definition
Plain-language definition
A test instrument that measures electrical values such as voltage, resistance, and current.
Why it matters
Reliable measurements turn guesses into evidence during electrical diagnosis.
Technical detail
A digital multimeter selects measurement circuits for voltage, resistance, continuity, diode testing, and sometimes current, displaying a quantified result.
Examples
- Measure a charger output in DC-voltage mode before replacing a device battery.
Related terms
Sources and review
Reviewed July 12, 2026 by [email protected]. Next review due July 11, 2027.
- How To Use A Multimeter — iFixit Accessed 7/11/2026
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