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A multimeter reads electrical values. These steps cover the basics. Electrical work can be dangerous. Always follow the instructions, use the right safety rating for the job and call a licensed electrician if you are unsure.
Last updated: October 31, 2026.
Set the Dial and Probes
Black probe in COM, red probe in the voltage/ohm jack. Choose the right dial setting before touching a circuit. See best multimeters.
Measure Voltage
Choose AC or DC, place the probes across the circuit, and read the display.
Check Continuity and Resistance
Turn power off first. Continuity beeps when a path is complete.
Safety
Use a meter with a suitable CAT rating, keep fingers behind the probe guards and never measure current in a circuit with probes in the voltage jack.
Frequently Asked Questions
Can I test a battery?
Yes, in DC volts.
What is continuity?
Whether current can flow.
Is it safe for mains?
Only with the right rating and care.
Bottom Line
Start with batteries and low voltage, and call an electrician for mains work you are unsure about.
