How To Use Analog Multitester – Multimeter or which is often referred to as AVO (Ampere Voltase Ohm) meter, is a tool that serves to measure electrical devices about the electric current, voltage and resistance (resistance) in the unit that has been set.. Measuring resistance using a multimeter is easy if you have the basic skills and knowledge. Note that we’ve removed the wires to ensure we’re not getting spurious readings from the rest of the wiring in the car. Think of it this way: Continuity is a binary version of resistance. However, if you choose to test for resistance when the component you are examining is not plugged out of the circuit, you will, without a doubt, get a reading that is inaccurate. His new book, Ran When Parked: How I Road-Tripped a Decade-Dead BMW 2002tii a Thousand Miles Back Home, and How You Can, Too, is available here on Amazon. Instead, we’re usually interested in verifying continuity. How to measure resistance. For a number of reasons, you need to turn the power off and measure the resistance of individual pieces of the circuit. Turn off the power! Amazon and the Amazon logo are trademarks of Amazon.com, Inc or its affiliates. For accuracy, it is appropriate that you select the correct range. Do not get wrong setting that causes damage to multimeter. 4. 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). Measuring resistance with a digital multimeter, Choose an item you want to measure resistance, Ensure you place your multimeter leads into an appropriate socket, reading value of your resistance is 90 ohms. When testing a resistor, the multimeter is passing a known amount of electrical current through the resistor and then measuring the amount of current that actually makes it through. Find the range of the resistance; Conduct the measurement; Read the results displayed; Set your multimeter to a high voltage range. If you, however, find one that is not automatically set, commence by setting a middle range as you refer to your manual script. Resistance (Ω): This measures how much resistance there is in the circuit. If you don't know what they mean, that's ok! On this one, it’s a push button. Here’s the same measurement on the cheaper multimeter: Notice that previously we didn’t have to set the scale, it was automatically determined. Here’s the same measurement on the cheaper multimeter: Notice that previously we didn’t have to set the scale, it was automatically determined. However, if you ever find yourself without internet access, a multimeter is very handy at measuring resistance. Place the probes of your multimeter in the needed sockets.eval(ez_write_tag([[300,250],'handtoolsforfun_com-medrectangle-4','ezslot_2',103,'0','0'])); An analog multimeter is made up of a few ports, and you must place the leads into an appropriate port if you want to obtain an accurate value. Basic introduction to using a digital multimeter to measure resistance of a resistor. How to turn it on varies meter to meter. To measure resistance using an analog multimeter, you need to choose an element you are looking to measure its resistance and switch off its power from the circuit to enhance the accuracy of your measurement. Once it’s there, it’ll never need to be moved. If it is OL, the range is too minimal, but if it ranges around a figure above zero, consider the range set.eval(ez_write_tag([[300,250],'handtoolsforfun_com-large-leaderboard-2','ezslot_8',106,'0','0'])); Finding the appropriate range will determine your results. The resistance reading should drop from “OL” to near zero (meaning less than an ohm), and the audible beep should sound. Again we have ranges from 200Ω to 2MΩ, select the one that you desire, here in the below picture I am placing it on 20k value. Touch each end of the element using a single lead; in case the reading displayed on your multimeter is zero, then you have a maximum range. Set the multimeter to Ohms or Resistance. In case you lack basic knowledge and skills, you are likely to plug this leads into any given ports. Choose the item whose resistance you wish to measure. Resistance is the measure of electrical “friction” as electrons move through a conductor. How to Measure Resistance with Multimeter. Start your testing with the highest current range. For example, if you’re measuring the resistance between the “+” and “-” terminals on a coil, take all the wires off them first. The sub-one-ohm reading—and the beep—indicate continuity to ground. How to Check a Power Adapter with a Multimeter. If you don’t plug in your leads correctly, then you are prone to getting results that are corrupted. How to measure current using a multimeter. As for measuring voltage on an auto-ranging multimeter, there will be only one dial setting for measuring resistance. Now let’s see how to measure resistance. This is what you should see when you put the probes on something that has continuity such as an intact wire or a closed switch. In using multimeter, we must know what units will be measured. You can measure the voltage and the current of a live circuit and use those figures to calculate the resistance (Ohm’s Law), but you can’t actually measure the resistance of a live circuit. And, really, most of the time we’re not interested in the resistance value itself anyway. Set your multimeter to a high voltage range. Digital multimeters usually have labeling on each port; red for positive port while black is for a negative port. 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