- 1). Set the control on the multimeter to the electrical setting you want to test. For example, if you want to test the output voltage from a battery, set it to measure volts, but if you want to test the amperes from a battery, set it to measure amperes. The multimeter clearly displays the settings.
- 2). Set the multimeter to measure within a certain range. For example, if you're testing a 1.2-volt battery, set the multimeter to read between 0.5 and 1.5 volts. If you're testing a battery that produces 1,200 milliamp hours set the milliamp range to between 800 and 1,400 milliamp hours. Most batteries and devices clearly label the voltage and ampere (or milliamp hour) output.
- 3). Check to make sure the settings are correct. Place the metal prong on the end of the black wire from the multimeter onto the negative terminal of the device you're testing. Place the metal prong on the end of the red wire from the multimeter onto the positive terminal of the device you're testing. All batteries terminals are clearly labeled "+," meaning positive and "-," meaning negative.
- 4). Read the digital display on the multimeter. It tells you accurately the voltage or amperes, depending on the settings you entered. If you want to measure a different electrical measurement simply alter the settings on the front of the multimeter and change the range as necessary.
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