How to Use a Multimeter
A multimeter is a handy device for taking measurements of electric currents. You can use it to test for functions including AC/DC currents, voltage, resistance, and ohms.
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You Will Need
- Multimeter
- Electronic device
- Schematic diagrams (optional)
Steps
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Use caution when working with electricity. Always unplug appliances from their power sources before testing unless you know how to properly test a live circuit. Do not touch exposed metal, and do not exceed the maximum voltage rating on a meter.
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Step 1
Identify connections
Identify the connections to the circuits that you want to test in your electronic equipment.
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You will need some knowledge of electronics to get to the connectors safely and to understand the meanings of the multimeter readings. Consult the schematic diagrams before beginning.
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Step 2
Turn on device
Turn the multimeter on if it has a digital output. If the multimeter does not power on, check that it has a working battery.
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Step 3
Adjust output setting
Adjust the multimeter's mode to the setting you want to test and the expected output range.
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Do not attach a high voltage connector to a low voltage multimeter.
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Step 4
Connect electronics
Connect the correct terminals on the electronic device to their corresponding ports on the multimeter.
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The black probe generally goes into a common terminal. The other line's location depends on what you are measuring.
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Step 5
Take reading
Take the reading from the multimeter.
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Step 6
Disconnect
Disconnect the multimeter, reconnect the electronic equipment, and turn off the multimeter's power. Record your readings feeling confident that everything's in working order.
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Electricity travels at approximately the speed of light -- about 186,000 miles per second.
