Definition
A handheld electronic test instrument that measures multiple electrical properties — typically voltage, current, and resistance — and displays the readings as numerical values on a digital screen.
Plain English
An electrical testing tool that shows the reading as a number on a small screen, used to check voltage, current, or resistance in a circuit.
Context Anchor
Seen in aircraft electrical system inspection, troubleshooting, and maintenance procedures.
Derivation
From 'multi-' (many) and 'meter' (a measuring device). 'Digital' refers to the numerical display, distinguishing it from older analog multimeters that used a moving needle on a scale.
Why Pilots Care
Accurate electrical measurements are essential for diagnosing faults in aircraft wiring, batteries, and avionics. A digital multimeter gives precise readings that reduce guesswork and help confirm a system is safe and serviceable before flight.
Intuition Check
A digital multimeter is not just a voltage checker. It can measure several electrical conditions, but it must be set to the correct function before use.
Example Sentence 1
The technician used a digital multimeter to verify that the landing light circuit had 24 volts at the connector.
Example Sentence 2
After replacing a faulty switch, the mechanic used the digital multimeter to verify continuity through the circuit.