Other modes are less likely to damage the meter, but consider the lowest resistance setting and the 10V setting your default. The line can appear next to or over the letter. The initial measurement will fluctuate while measuring AC voltage, but this will stabilize to an accurate reading. Select interchanging or direct current, depending on the type of circuit you’re working with. Jesse Kuhlman is a Master Electrician and the Owner of Kuhlman Electrician Services based in Massachusetts. Is this a good reading? The "AC" scale is for reading AC voltage. Way to go, the best I've seen so far! Check the nameplate on your battery or breaker to determine its maximum amps. Basic Steps and Precautions •Remember; Voltage is measured across a component, but current flows through a component. Basics to Measuring DC Voltage 1. How do I use the dB scale of an analog multimeter? The biggest drawback to analog multimeters is that they can be difficult for beginners to read. If you're having trouble remembering the difference between voltage and amperage, picture a water hose. Typically, the port for low-current circuits has a fuse rated to. MAGS How To Videos - How To Use a Multimeter (For Beginners)In this video I will help teach you how use a multimeter to test volts (AC & DC), amps and ohms. The Ω scale is for reading resistance. Wallulis holds a Bachelor of Arts in psychology from Whitman College. ", "This article helps me to understand how to read a multimeter. Measuring resistance on electronic components whether doing it individually or in-circuit, is not simple unless you had learned how to read resistance scale using an ohmmeter of an analog… You can measure Volts and Amps with a special tool called a multimeter. The black probe always goes into the port labeled, When measuring voltage or resistance, the red probe goes into the port with the smallest current label (often, When measuring current, the red probe goes into the port labeled to withstand the amount of expected current. Typically the DC voltage is marked as a V followed by a short line with a dotted line under it. wikiHow is where trusted research and expert knowledge come together. Approved. in measuring 110VAC or 240VAC, your range selector should be at 250 VAC. Analog multimeters, like digital ones have a variety of ranges. Jesse specializes in all aspects of home/residential wiring, troubleshooting, generator installation, and WiFi thermostats. Multiply the resistance reading on your multimeter. If you were to ever set the selection knob to a number value lower than the voltage of the thing you’re testing, the multimeter would just read “1”, signifying that it’s overloaded. The voltage is the water pressure that's moving through the hose, and the amperage is the size of the hose, which controls how much water can move through at once. You need to form one circuit that indicates the multimeter ''in series'' with other components in order for you to check the cable current. •This is not a “Auto-ranging Digital Multimeter! The Black Meter lead/Probe is Negative 3. If you have no idea what current to expect, set it to the highest range for your first try to avoid damaging the meter. It was later developed and sold as the … The process for reading current on a digital multimeter depends on your specific multimeter, but it is similar across most devices. If you are reading 0.332 on the 2M setting, that would be 332K. It depends on what type of electrical device you are testing. Jesse is also the author of four eBooks on home wiring including "Residential Electrical Troubleshooting" which covers basic electrical troubleshooting in residential homes. He has written for the Guide to Online Schools website, covering academic and professional topics for young adults looking at higher-education opportunities. "It has helped me to understand and reading the tester meter, I just need to take a little more time with this. If you want to test a DC circuit, switch the setting on your multimeter to VDC or DCV. f you're using a multimeter for the first time, one of the things you'll need to learn is how to read it, which isn't that obvious. Analog multimeter ranges. Check the breaker of the branch circuit you are measuring voltage, is it on or off?When everything has been checked and everything is normal, maybe the Power Distribution Unit is switched off. There are 2 styles of multimeters in the following. Jesse is also the author of four eBooks on home wiring including "Residential Electrical Troubleshooting" which covers basic electrical troubleshooting in residential homes. This article has been viewed 671,927 times. However, some devices may convert the power to DC through a transistor, so check the voltage label before you test an object. A right-pointing arrow with a cross through it marks the "diode test," for testing whether one-way electrical circuits are connected. Connecting the two leads to the positive and negative terminals of an electrical circuit and setting the range selector to the right setting will give an accurate readout of the current in the circuit. Where do I put the multimeter when I am measuring amp? Set the meter to the 10 A range (dial one click counterclockwise) and then read the current. Have an idea how high the voltage you are going to measure will be, so that you can set the range selector to the proper voltage range. So if it reads 3.00 then that's a current of 3 Amps. This article has been viewed 671,927 times. 3. Turn the range selector dial to the 250 ampere setting. It would also be in danger of blowing the fuse that is normally … Is it on the proper voltage range? If you have an analog VOM (Volt-Ohm-Milliampere or Volt-Ohm-Meter) set to 2.5mA on the selector, and you are looking at the 2.5mA scale on the meter face, a reading of 0.45 means 0.45mA. The negative wire’s probe should be connected to the socket, and the other probe connected to the meter. The power coming from most household circuits is AC. And even a cheap, category I (CAT-I) multimeter is fine as you are merely testing voltage, not amperage. Analog multitesters are those that have a moving needle that stops on a number that is printed on the background behind the moving needle. Each range on the DC display is used for two positions of the selector switch. Unlike the other scales, the 0 (zero) value is on the far right instead of the left. You can also refer to your user's guide for specific information about your multimeter settings. Last Updated: May 29, 2020 Before you attach your multimeter to the circuit, you need to make sure that the meter is rated for the number of amps traveling through that circuit. It is primarily used to measure voltage (volts), current (amps) and resistance (ohms). Each type of meter has its advantages. If the mirrored scale has 50VAC full scale deflection value, then the value of each scale division should be 5VAC. Analog multimeters may be more difficult to read than their digital counterparts, but the continuous movement of the needle allows a more precise monitoring of changes in current and resistance than a digital readout. An analog multimeter can be a little more difficult to read than more modern digital meters in the way that the needle can be jumpy and take time and patience to get an accurate result.The concept of a multimeter is that it can read multiple types of electrical movements of input and output on an electrical circuit. Master Electrician. Electricity performs work for us when it travels in a circuit. In this video, learn how to use the basic functions of a digital multimeter. This article was co-authored by Jesse Kuhlman. To read a multimeter on an AC system, you'll need to locate the numbers and symbols on your circuit system. The labels on a multimeter can seem like their own language to a layman, and even people with electrical experience may need a helping hand if they encounter an unfamiliar multimeter with an offbeat abbreviation system. See the end of this section for a brief explanation. If you really can’t stand to see another ad again, then please consider supporting our work with a contribution to wikiHow. They are described in terms of Full Scale Deflection or FSD. % of people told us that this article helped them. By signing up you are agreeing to receive emails according to our privacy policy. Most multimeters have functions for measuring several different quantities. How to Use a Multimeter - Beginner's Crash Course - YouTube A typical multimeter can measure voltage, current, and resistance. Turn on the meter and insert the probes into the appropriate spots. The meter movement is delicate and dropping the meter is likely to damage it! Analog Multimeter, Measuring DC Voltage . This article has 12 testimonials from our readers, earning it our reader-approved status. wikiHow marks an article as reader-approved once it receives enough positive feedback. Jesse specializes in all aspects of home/residential wiring, troubleshooting, generator installation, and WiFi thermostats. Analog multimeters tend to be much more fragile than digital multimeters, while auto-ranging digital multimeters are sturdiest of all. Step – 2 . What are some basics for reading a multimeter? If you are having trouble reading a digital multimeter, refer to the manual.