Analog Meter Precautions •Do not Jar, manhandle, drop or pile ... the Zero Ohms (Ω) Adjust knob to adjust the needle if needed to read Zero Ohms. Test AC or DC voltage. Analog Meter: If you are using an analog multimeter, the steps are the same in both instances, but the device may look different with the needle showing you the actual measurement. To test a refrigerator's temperature control, for example, pull the temperature control knob away from the refrigerator's wall and touch each alligator clip to one of the temperature control's two terminals. How to Troubleshoot a Dryer's Thermal Cutoff Switch, How to Check Heating Elements in Hot Water Heaters, How to Check the Continuity on a Water Heater Element, How to Fix a Door That Won't Lock on a Self-Cleaning Oven, How to Check the Resistance of the Igniter in a Dryer, How to Know if a Whirlpool Oven Sensor Is Bad. Set the multimeter range. Read the multimeter. 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. In the illustration above, the technician has set a manual multimeter to kiloohms and retrieved a reading of .016 K ohms. Analog Multimeter Basics and Measuring Resistance . Otherwise, you will not be able to measure the full voltage, and you may damage your multimeter. Or if you are measuring a 100 ohm resistor and your multimeter has 10 ohm, 100 ohm and 1000 ohm settings, set it to 1000 ohms. There are a couple different ways to interpret the question. For example, when testing a refrigerator's temperature control, turn the temperature control knob as you would to make the refrigerator cooler. Mastering some fairly universal abbreviations, and a few basic principles, will help you decipher the often-cryptic settings on your multimeter. Christina Sloane has been writing since 1992. How do you read the ohms scale on an analog multimeter? In case you get the reading of 1 (one) or OL, that means the meter is overloaded and needs a higher scale in order to output accurate results. For testing smaller appliances such as blenders and toasters, you will only need to access the electrical plug. An Example. Because of this, you should set your multimeter on its appropriate range to enable you to take the correct reading, hence be in a position to get an accurate reading value of the resistance. Touch the black lead to the negative or ground wire. 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). Her work has appeared in several national literary magazines. The meter should output one of three values – 0, 1, or a random number that should be the actual value. The meter should output one of three values – 0, 1, … 2. A reading of 0.L (infinity), or a reading higher than 120 ohms indicates that the element is defective or dirty. If you’re looking for an instructional video, this one is great to check out: Before throwing away an appliance, test it with a multimeter. Attach alligator clips to the multimeter probes. Attach an alligator clip to each of the two terminals you need to test, such as electrical cord prongs or element leads. A component resistance ranges from one ohm to megaohms, that is, 1,000,000 ohms. Turn on the analog multimeter and set the selector switch to "ohms." For testing larger appliances such as stoves or refrigerators, you may need to remove a panel and/or remove individual components from the appliance to test them. Since the meter is set for kiloohms, it is .016 x (K) or times (1000) equals 16 ohms. Otherwise, you will not be able to measure the full voltage, and you may damage your multimeter. When it does, you will want to wait a few seconds for the needle to shop moving. In other words, if you see the value of 1, move the switch to a higher scale (mega-ohms). If you want to do a test reading, the easiest way to do it is to pick out a random resistor that is not a part of any circuit, set the multimeter to 20 kilo-ohms setting, and touch both ends with the probes.. That way, if the resistance is slightly too high, you will be able to detect it. Turn on the multimeter and set its function to the lowest setting for ohms (resistance). Or if you are measuring a 100 ohm resistor and your multimeter has 10 ohm, 100 ohm and 1000 ohm settings, set it to 1000 ohms. The line can appear next to or over the letter. The next sensitivity range on most meters is 10X for analog meters or 0-2,000 ohms for digital ones. A variety of home electrical problems can cause appliances to malfunction or stop working, but homeowners often assume that the appliance itself is defective. Because of this, you should set your multimeter on its appropriate range to enable you to take the correct reading, hence be in a position to get an accurate reading value of the resistance. © Copyright 2020 Hearst Communications, Inc. A low ohm reading indicates that the element is good. Turn on the multimeter and set its function to the lowest setting for ohms (resistance). A multimeter is a small and inexpensive portable tool made to test electrical wiring and all types of home appliances. The needle on the analog multimeter will jump to register a reading. Resistance is an easy measurement to make. A multimeter can measure several different aspects of electricity: force (or volts), current (or amps) and electrical resistance (measured in ohms). If you are using an analog device, hold the two probes together as you adjust the meter’s needle to “0.”. A component resistance ranges from one ohm to megaohms, that is, 1,000,000 ohms. Access the appliance element you want to test. An improperly set manual meter set to ohms may indicate 0.001 confusing the operator and the test results. Turn the device's knob or press its buttons as you would do when using the device normally. Touch the red lead to the positive portion of the electronic coil or device. Unplug any appliance you need to test and turn off the power from the circuit breaker to eliminate risk of electric shock.

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