Multimeter resistance symbol overview
Tools and Tips

Multimeter resistance symbol overview

19.02.2023 /

You may be familiar with a multimeter. You have probably seen this around technicians or any other technician. I was like that too, until I had the need not only to learn it, but to learn how to use it correctly.

How difficult is it for electricity to flow through something, if it is very difficult, then there is a higher resistance. 

A multimeter is something that can be used to measure resistance, it sends a small electrical current through a circuit. Just as there are units of length, weight, and distance; The unit of measure for resistance in a multimeter is the ohm.

The symbol for ohm is Ω (called omega, the Greek letter). (1)

The list of resistance measurement symbols is as follows:

  • ohm = ohm.
  • kOhm = kOhm.
  • MOm = megaohm.

In this article, we will look at measuring resistance with a digital and analog multimeter.

Measuring resistance with a digital multimeter 

Steps to follow to complete the resistance test procedure

  1. All power to the circuit under test must be off.
  2. Ensure that the component under test is separated from the entire circuit.
  3. The selector must be on Ω.
  1. The test lead and probes must be properly connected to the terminals. This is necessary to obtain an accurate result.
  2. Watch the window to get a reading of Ω.
  3. Choose the correct range, which ranges from 1 ohm to megaohm (million).
  4. Compare the results with the manufacturer's specification. If the readings match, the resistance will not be a problem, however, if the component is a load, the resistance should be within the manufacturer's specification.
  5. When overload (OL) or infinity (I) is indicated, the component is open.
  6. If no further testing is necessary, the meter should be "turned off" and stored in a safe place.

Measuring resistance with an analog multimeter

  1. Select the element whose resistance you want to measure.
  2. Insert the probes into the correct socket and check the colors or markings.
  3. Find the range - this is done by observing the fluctuations of the arrow on the scale.
  1. Take a measurement - this is done by touching opposite ends of the component with both leads.
  2. Read the results. If the range is set to 100 ohms and the needle stops at 5, the result is 50 ohms, which is 5 times the selected scale.
  3. Set the voltage to a high range to prevent damage.

Summing up

Measuring resistance with a multimeter, whether digital or analog, requires attention to get an accurate result. I'm pretty sure this article helped you learn what to do when using a multimeter to measure resistance. Why involve a professional for a simple check if you can! (2)

Take a look at some of our articles below.

  • How to measure amps with a multimeter
  • How to test a spark plug with a multimeter
  • How to test a circuit breaker with a multimeter

Recommendations

(1) Greek script - https://www.britannica.com/topic/Greek-alphabet

(2) professional - https://www.thebalancecareers.com/top-skills-every-professional-needs-to-have-4150386

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