Lesson
Understanding Resistance and Measurement Principles
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Steps to Measure Resistance
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Turn off the power to the circuit or component.
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Never measure resistance on a live circuit.
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Turn on the multimeter.
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Set the dial to the resistance (Ω) mode.
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Some meters have ranges; choose the appropriate one.
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Many digital meters auto-range automatically.
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Connect the probes:
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Red probe to the VΩmA port.
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Black probe to the COM port.
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Place the probes across the component or points where resistance is to be measured:
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Polarity does not matter.
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Ensure no parallel paths affect the reading.
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Read the resistance value on the display (in ohms, Ω).