How To Use A Multimeter A Beginner's Guide

A multimeter is an electrical gadget that measures electricity. It is pronounced "multi-meter" or "mul-tim-i-ter." You may also hear it referred to as a volt-ohm metre or multi-tester. They come in both digital and analogue formats. This specialised metre allows you to determine whether a wall plug is fully working. It's also advisable to test your surge protectors, batteries, and power supply. In that manner, you can be confident your gadgets are in working order.


Use a Multimeter to test the following electrical properties:


AC voltage: tested on products with electrical plugs.

DC voltage: tested in batteries or other things that store a bank of electric power.

Resistance: Measured in ohms.

Current is measured in amperage (ampere), sometimes known as amps.


In this tutorial, you’ll learn how to use a multimeter to measure current, voltage, and resistance with Selfguard Automation and Controls the trusted honda eu30is generator manufacturer in India.


Multimeter Basics

A multimeter is separated into three major parts:


  • LCD Display
  • The dial
  • The ports 


The LCD display indicates the value you're measuring. The multimeter dial allows you to choose what to measure. The ports are where you'll connect your test probes.


Each multimeter normally has three or four ports. And their marks will indicate what they are for. Typical markers are:


  • 10Amax - This port is used to measure extremely high currents up to 10A.
  • COM - Always connect the black probe to this port, as it is your multimeter's ground.
  • The mAVΩ port measures voltage, resistance, continuity, and low currents. Some multimeters can also measure diode current, temperature, and capacitance.


How To Measure Voltage Using A Multimeter


Begin by preparing your multimeter to measure voltage: Connect the black probe to the GND port, and the red probe to the V (Voltage) port. On the dial, pick a V range for voltage measurement. The number on the dial represents the greatest value possible within that range.


As you can see, there are two voltage options: direct current (DC) and alternating current (AC). 


So, before you start measuring, you must first decide what type of voltage you want to measure and then select the proper choice (most low-voltage electronics use DC).


How To Measure Current Using A Multimeter


This one is a little tough because you have to interrupt the circuit. But once you see how it's done, you'll realise that it's not so difficult after all.


To set up your multimeter to measure current, attach the red probe to the current measurement port. 


If you want to measure tiny currents, insert the red probe into the mA (milliamperes) port. For greater currents, connect it to the 10A port. (Some multimeters display other values, such as 20A).


The black probe should be connected to the COM port as usual. Turn the dial to the A (current) area and select a number within the suitable range.


To measure current, connect the multimeter in series so that the current flows through it. In practice, this requires physically interrupting the flow of electricity and connecting the metre to the circuit.


How To Measure Resistance Using A Multimeter

Set up your multimeter to measure resistance by connecting the black probe to the COM port and the red probe to the port marked with Ω. Choose the resistance option shown on the dial, and then the range you believe your resistor falls inside.


To measure resistance, simply insert the probes across the resistor. This is especially helpful if you find it difficult (or inconvenient) to read the colour codes on the resistor.


Now that you understand the fundamentals, you may choose the best multimeter for your needs. Both types can measure DC voltage, AC voltage, and resistance. However, they have distinct strengths and drawbacks.


Digital multimeters are suited for heavy-duty everyday use. They're also an excellent choice for homeowners who desire straightforward, unambiguous readings. Basic models are less expensive than more complicated models.




  • Displays are easy to see and accurate.
  • Auto-shutdown
  • Auto-ranging choices.
  • Quick and simple readings for the most fundamental jobs.
  • Specified functions for specialised work
  • More reliable than analogue for sensing voltage.


These multimeters are known for the following characteristics:


  • Cost-effectiveness
  • It takes longer to dial in a measurement.
  • Measure amps accurately, especially milliamps.


Now that you've learned how to use a multimeter, you may test your outlets, plugs, and batteries. Additionally, always consult the user manuals and instructions that come with the specific devices you want to integrate your multimeter into, such as a generator automatic start stop kit or unit if you're looking to incorporate it into advanced systems. Happy measuring!


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