How to Read Ohms on a Multimeter?
Apr 25, · If you have an analog meter, you must multiply the value on the meter by 10; for example, if the meter reads , the actual resistance is ohms. A digital meter performs the calibration internally, so the readout on the screen is always the actual resistance in ohms. How to Read an Ohmmeter - Purkeys.. The multimeter combines multiple electrical diagnosis functions into one portable unit. Technicians use this tool to test a wide range of situations, including voltage drop, continuity checks, diode checks, and capacity checks. In the video above, Purkeys National Truck & Fleet Representative, Larry Rambeaux.
Measuring resistance on a multimeter can be really easy with some very simple steps. Resistance, otherwise known as ohms, is needed to be measured for many reasons. What does the prefix oxy mean may want to check resistance in order to see the accuracy of a resistor. Or you may not know the resistance of a circuit and want to know what it is. Most circuits are color coded which makes it easy to determine their resistance, but in any case, you can always check this using your multimeter.
No matter what your reason for measuring resistance, your digital multimeter is a great piece of equipment to do it with. You can utilize most of the Fluke brand devices to measure resistance including some of my favorites like the FlukeFlukeFluke 87V, or Fluke FC. There are a few simple steps to measure resistance with your digital multimeter :. Resistance is an easy measurement to make. Your email address will not be published.
Skip to content. Pick the item you want to measure where resistance may be found. The black lead will stay in the socket that says COM which is normal. The multimeter should say almost zero, but usually will say 1 or 2. If your how many calories in stella artois light shows a high number, then something is wrong with your multimeter and you probably will not have accurate results. Again, make sure your resistor is not connected to any circuit or power source.
Take your black and red lead and connect them to opposite ends of the object you are looking to check resistance on the resistor. Your device will then show you a number which is your resistance. If electricity is flowing through it, it will not measure resistance properly. First disconnect the device from any power source prior to testing its resistance.
It is best to remove the resistor from the circuit prior to testing it for resistance as the additional paths within the circuit will affect the results of the resistance as they will have resistance as well. Analog Meter: If you are using an analog multimeterthe steps are the same in both instances, but the device may look different with the needle showing you the actual measurement. Leave a Comment Cancel Reply Your email address will not be published.
Using Ohm's Law
Feb 08, · Reading the digital display. Look for a symbol ‘’M’’ or ‘’K’’ located next to the omega to come up with the scale of your reading value. Usually, the label on . For the red probe lead, you’ll need to make sure it’s put in the socket which shows the ohms symbol (?). Next, you’ll want to test if the meter is functioning properly by taking your red and black probe leads and touch the metallic parts together. The multimeter should say almost zero, but usually will say 1 or 2.
Measuring each of the three most important parameters of an electric circuit -- voltage, current and resistance -- requires a specific meter, but many manufacturers sell meters that can measure all three. These multimeters, whether analog or digital, have range settings for each parameter that allow you to increase the meter sensitivity to measure small values.
Depending on the quality of your meter, it should heave four to five ranges of settings for measuring resistance. Multimeters employ this law when measuring ohms, which are the units of resistance, by generating a current through the circuit by means of an internal battery. Adjusting the range selector on the meter modifies the current -- weaker currents can measure resistance in fragile circuits without damaging them.
Ranges typically increase by a factor of 10, but some on some meters, certain ranges may differ by a factor of Multimeters have three input ports for the two leads that come with it. In order to measure resistance, one of the leads -- usually the black one -- must be inserted in the "common" port while the other lead -- the red one -- goes into the port marked with the Greek letter omega, which is the symbol for ohms.
Before taking measurements, it's important to make sure the meter is working. When you set the selector to the most sensitive setting, which may be designated ohms or 1X, the meter should jump to the left or the display should show an error message; both indicate the large resistance of the air between the leads. When you touch the leads together, the resistance should read 0.
If you're measuring resistance in electronic circuitry, you generally need the most sensitive range the meter offers, which is the one designated ohms or 1X. When using this range with an analogue multimeter, the value indicated by the pointer is the actual resistance.
If you're using a digital multimeter, the meter will display its maximum number of decimal places. If the resistance is too high to be measured in this range, a digital meter will display an overload message, and the pointer on an analog meter will move too far to the left to give a meaningful reading.
When this happens, you need to decrease the meter sensitivity. The next sensitivity range on most meters is 10X for analog meters or , 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 A digital meter performs the calibration internally, so the readout on the screen is always the actual resistance in ohms.
Subsequent ranges on an analog meter, for example 1K, K and 1M, require multiplying the meter reading by one thousand, one hundred thousand and one million respectively to get the value for resistance. Chris Deziel holds a Bachelor's degree in physics and a Master's degree in Humanities, He has taught science, math and English at the university level, both in his native Canada and in Japan. He began writing online in , offering information in scientific, cultural and practical topics. His writing covers science, math and home improvement and design, as well as religion and the oriental healing arts.
How to Read Amps on an Analog Multimeter. Analog Multimeter User Instructions. How to Read an Ohm Meter. How to Connect an Ammeter. How to Test Diodes in Circuit. How to Use Ammeters. The Disadvantages of Analog Multimeters. What Are the Applications of a Multimeter? How to Use a Multimeter for the Beginner. How to Set Up an Ammeter. How to Use a Voltmeter on a 12 Volt. How to Choose a Potentiometer. How to Calculate DC Offset. Copyright Leaf Group Ltd.