What is a digital multimeter?

A digital multimeter is an indispensable tool for testing, diagnosing, and troubleshooting electrical circuits, components, and devices. it is is a test tool used to measure two or more electrical values—principally voltage (volts), current (amps) and resistance (ohms).

It is a standard diagnostic tool for technicians in the electrical/electronic industries. The first digital multimeter was introduced in the late 1970s, and has proven much more accurate and reliable than the old needle-based analog meters.

How to use a multimeter

Digital multimeters integrate the capabilities of single-task meters such as the voltmeter (for measuring volts), ammeter (for measuring amps), and ohmmeter (for measuring resistance) (ohms). They frequently come with a number of additional specialized features or advanced options. As a result, technicians with special requirements might look for a model that is tailored to their requirements.

A multimeter's face usually consists of four components:

Test leads are insulated wires that plug into the DMM and are flexible (red for positive, black for negative). They act as a link between the item being tested and the multimeter. Testing circuits is done with the probe tips on each lead.

The phrases counts and digits are used to characterize the resolution of a digital multimeter, or how precise a measurement it can produce. A technician can evaluate if a slight change in a measured signal may be seen by knowing the resolution of the multimeter.

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