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To measure resistance: 1. Turn power to circuit OFF. If a circuit includes a capacitor, discharge the capacitor before taking any resistance reading. 2. Turn digital multimeter dial to resistance, or ohms, which often shares a spot on the dial with one or more other test/measurement modes (continuity, capacitance or diode; see illustration below).
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- Reading the Dial Settings: Test AC or DC voltage. In general, V indicates voltage, a squiggly line indicates alternating current (found in household circuits), and a straight or dashed line indicates direct current (found in most batteries).
- Reading an Analog Multimeter Result: Find the right scale on an analog multimeter. Analog multimeters have a needle behind a glass window, which moves to indicate the result.
- Troubleshooting: Set the range. Unless you have an auto-ranging multimeter, each of the basic modes (voltage, resistance, and current) has several settings to choose from.
Mar 6, 2024 · Step 1: Identifying the Scale. First up, check out the display for the omega symbol (Ω), which stands for ohms. If there’s a ‘K’ or ‘M’ in front of it, you’re in the kilo-ohm (KΩ) or mega-ohm (MΩ) range. For instance, 3.4 on the display with just an omega symbol is 3.4 ohms.
Apr 25, 2017 · Increasing the Measurement Range. The next sensitivity range on most meters is 10X for analog meters or 0-2,000 ohms for digital ones. If you have an analog meter, you must multiply the value on the meter by 10; for example, if the meter reads 13.5, the actual resistance is 135 ohms.
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Sep 14, 2023 · 3. Turn on the multimeter and select the best testing range. The resistance of a component can range from ohms (1 ohm) to megaohms (1,000,000 ohms). In order to get an accurate reading of resistance you must set the multimeter to the proper range for your component.
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Aug 29, 2022 · Now that you know the basics of resistance and why we measure it, it is time to show you how to check resistance with a multimeter. Step 1: Insert the black probe’s jack in the multimeter’s COM or common port. Insert the red probe in the ohm input port. Step 2: Select the ohmmeter function on your multimeter and select the resistance range.
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the resistance of a component matches the manufacturer’s specification . Figure 4: Ohm Test of a Load. Follow these steps to complete the resistance test procedure: Make sure all power is off on the circuit you are testing. Make sure that the component that you are testing is isolated from the complete circuit.
