They are very simple to use and can come in handy in many situations in amateur electronics. Fluke 115 digital multimeter with noncontact voltage for techicians with true rms. Oct 30, 2015 how to use a multimeter for beginners how to measure voltage, resistance, continuity and amps ratchets and wrenches. Product description the 3 is a hand held manual ranging dmm. Use the multimeter to measure ac or dc voltage or current, and resistance or decibel loss between two nodes in a circuit. How to use a multimeter for the beginner sciencing.
How to use a digital multimeter measure voltagecurrent. Best digital multimeter for home use whilst a virtual multimeter may additionally seem simple, its truly a reasonably complex piece of equipment used in many distinct fields by using electricians, electrical engineers and carrier technicians in industries ranging from vehicle restore to computer repair and more. This setting is usually denoted with the battery symbol. With a knowledge of how to make voltage, current and resistance measurements it is only necessary to know how to use the multimeter itself. Dec 20, 2015 in this video i am showing how to use digital multimeter and how to read dc and ac voltages,current,resistence,continuity,capatiance and temperatures all these measurements can read a digital. Download it once and read it on your kindle device, pc, phones or tablets. A multimeter can be used to measure electrical functions such as voltage, current, resistance, continuity and some are able to measure electrical frequency.
At the end of this article you will learn how to measure voltage with multimeter, measure dc current, check for continuity, measure. Then hold the probes against the resistor legs with the same amount of pressure you when pressing a key on a. Resistor values and corresponding tolerances will be determined by nominal component markings, instrument readings and ohms law measurments. A multimeter or a multitester, also known as a voltohm meter or vom, is an electronic measuring instrument that combines several measurement functions in one unit. The grounded result will vary according to the emf noise in the immediate environment. Introduction the student will learn to use the digital multimeter to take resistance, voltage and current measurments. Within pages of the book and minutes of video, i was completely lost, confused, and bored. In this video i am showing how to use digital multimeter and how to read dc and ac voltages,current,resistence,continuity,capatiance and temperatures all these measurements can read a digital. Turn off etc this can cause the battery in the meter to run down. Its actually not hard to learning to use a fluke multimeter but it can take some time if youve never done used anything like it before.
The neat thing about a multimeter is that unlike a ruler, watch, or scale, it can measure different things kind of like a multitool. Another important and useful feature of a multimeter is checking for continuity. The terms counts and digits are used to describe a digital multimeters resolutionhow fine a measurement a meter can make. A multimeter is a handy tool that you use to measure electricity, just like you would use a ruler to measure distance, a stopwatch to measure time, or a scale to measure weight. There are two types of multimeters analogue and digital and the instructions for use are the same for both. No matter what youre testing, the black test lead will always plug into the com. Dont ever forget to carry this whenever you are going for a competition. The student will learn to use the digital multimeter to take resistance, voltage and. While useful in the lab, the devices were very slow and impractical in the field. Analog meters use a printed linear or nonlinear background and a mechanical pointer. The background image was used to operate image differencing again with. This is a handout that was developed using materials in our how to use a multimeter tutorial.
Multimeters are used in all areas of electronics to determine the voltage, amperage or resistance in an electrical circuit. Analog multimeters use a microammeter with a moving pointer to display. The applications of multimeters are measuring accurately circuit and component parameters. The multimeter displays 0 ohms with the leads shorted together. Use features like bookmarks, note taking and highlighting while reading how to use a multimeter. The number and type of batteries required will vary from model to model. How to make a voltage measurement with a digital multimeter, dmm. Analog multimeter, measuring current steps in using your meter to measure current flow. An introduction to the digital multimeter wisconline oer this website uses cookies to ensure you get the best experience on our website. In single view, the control softkeys blue background softkeys, as. Voltages are measured simply by placing the digital multimeter across the two points where the voltage is to be measured. To gain an understanding of how to use a multimeter to measure voltage, resistance and current. Do not try it with a higher voltage, and do not use a bigger battery that can deliver more current. Only use test leads and terminals listed in the accessories and spare parts section in this.
How to use a multimeter for beginners how to measure voltage, resistance, continuity and amps ratchets and wrenches. A background appears behind text or images on the page. Power dissipation effects when measuring resistors designed for temperature measurements or other resistive devices with large temperature coefficients, be aware that the multimeter will dissipate. This instrument is known as a multimeter and has a switch that makes it possible to change the parameter being measured. Question 1 what will this voltmeter register when connected to a battery as shown assume a battery voltage of 6 volts. Ppt digital multimeter powerpoint presentation free to. Digital multimeters are particularly easy to use to make voltage measurements which. Please remember to complete and return your product warranty registration card. Dec 01, 2016 i learned how to use a fluke multimeter. Multimeter uses and functions how to use a digital. Simple instructions on how to use a digital multimeter our. Do not let your ohm meter set on any of the resistance ranges when not in use or when in storage. Simple instructions on how to use a digital multimeter.
Pdf multimeters are useful instruments for measuring electronic parameters. Jul 21, 2017 your multimeter might also have a dedicated setting for testing the amperage of aa, aaa, and 9v batteries. Multimeters may use analog or digital circuitsanalog multimeters and digital. For starters, lets go over some of the different parts of a multimeter. Analog multimeters use a microammeter with a moving pointer to display readings. Lets first try to analyze why do we have them there i. The ammeter offers advantages over the multimeter for measuring current in a. A digital multimeter is a test tool used to measure two or more electrical valuesprincipally voltage volts, current amps and resistance ohms. When i first got my meter, i was pretty much clueless as to its functionality. A typical multimeter may include features such as the ability to measure voltage, current and resistance.
This is a life saver tool that helps to debug electronics, be it your new pcb or a simple breadboard connection you can use continuity tool to check if there a connection between two terminals. The number that the needle stops on indicates the volts, ohms or amps the the meter is measuring depending on how the control knob is. In this learning activity youll explore the functions and proper operation of a digital multimeter. Again, you probably wont even use half of the settings shown, so dont get overwhelmed if you only know what a few of them do. This instrument will let you check to see if there is.
The first movingpointer currentdetecting device was the galvanometer in 1820. Products electrical testing tools multimeters multimeter limit 300. The operation of an analogue multimeter is quite easy. Measurement of voltage, current, and resistance using the multimeters provided in the lab. The measured current value is automatically calculated for the user with the help of the adjustable clamp factor. A multimeter is an instrument used to check for ac or dc voltages, resistance and continuity of electrical components, and small amounts of current in circuits. If you do get it wet, open the case and let it set open until it is dry. A simple guide with picture examples kindle edition by. Many years ago, in wanting to better understand what my multimeter could do, i bought a book from tab books and rented a dvd from a howto video service. One solar module one small dc motor with fan attachment an electric circuit is an interconnection of electrical elements. However, a single instrument can perform all three tasks, acting as a voltmeter, ammeter and an ohmmeter. To take several experimental measurements and compare them.
You must break the circuit and place the meter in series with the circuit. A multimeter is an electronic instrument, every electronic technician and engineers widely used piece of test equipment. At the very basic level you have the device itself, along with two probes, which are the black and red cables that have plugs on one end and metal tips on the other. You just have to figure to some reading basics that may help you take the desired readings. I have found that the concept of electrically common points is most helpful when students first learn to relate voltage drop with continuity breaks or. How to measure the effect of earthing on body voltage.
Nov 26, 2018 a multimeter, also known as a voltohm meter, is a handheld tester used to measure electrical voltage, current amperage, resistance, and other values. Multimeters come in analog and digital versions and are useful for everything from simple tests, like measuring battery voltage, to detecting faults and complex diagnostics. Dustproof, waterproof, shockproof multimeter designed to withstand the toughest environments. In the right hands, a digital multimeter is a powerful tool that can be used in countless applications. Mar 31, 2018 in the right hands, a digital multimeter is a powerful tool that can be used in countless applications. I learned how to use a fluke multimeter when i first got my meter, i was pretty much clueless as to its functionality. Fluke 115, digital multimeter with its simple operation, compact design and ease of use. Take accurate voltage, current and frequency measurements on the output side of the drive at either the drive itself or at the motor terminals. Multimeters can be used as an ammeter, a voltmeter, an ohmmeter. Almost all portable electronics use direct current, not alternating current. It can also be used to test continuity between two points in a electrical circuit.
A multimeter, also called a voltohm meter or vom, is a device that measures resistance, voltage, resistance, and continuity. It is a standard diagnostic tool for technicians in the electricalelectronic industries. Pick out a random resistor and set the multimeter to the 20k. Multimeter limit 300 precision measuring instruments limit. In fact, its one of my most commonly used tools when im working on an installation. Use the meter only as specified in this users manual, otherwise the protection provided by the meter may be impaired. The background can be as simple as a solid color, or you can use an image. Advantages of a digital multimeter are its output display which directly shows the measured value, high accuracy, ability to read both positive and negative values. Pdf computer visionbased approach for reading analog. Also, if you have metal braces on your teeth, be careful not to touch them with the battery.
Multimeter is mainly used to measure the three basic electrical characteristics of voltage, current and resistance. Using analog or digital multimeter in pcb, electronics or mobile phone repairing is must. Analog multimeters are preferred by some technicians because the movement of the needle can show you some things that are not so obvious with digital multimeters. He is the author or editor of over a dozen books on technology, diy, and geek culture. Multimeter measurements on dc resistive circuits objectives. A multimeter or a multitester, also known as a vom voltohmmilliammeter, is an electronic measuring instrument that combines several measurement functions in one unit. The digital multimeter has replaced the pmmc meter and is an indispensable tool of all engineers today. With this guide, youll learn the ins and outs of troubleshooting your home and household electronics using one. Gareth branwyn is a freelance writer and the former editorial director of maker media. The configuration of the multimeter selector switch position, test lead jacks. Plug the black probe intocom and the red probe into mav set the multimeter to 2v in the dc direct current range.
Digital multimeters long ago replaced needlebased analog meters due to their ability to measure with greater accuracy, reliability and increased impedance. A multimeter, shown in figure 1, is a device used to measure two or more electrical quantities. This handout is developed to be printed out and used in a classroom. They are available in two varieties, analog and digital. And by the time youre done with this post, your hands will be plenty capable of putting a multimeter to use in your next project. It features extra large numerals on the lcd, and data hold for all functions and ranges. These were used to measure resistance and voltage by using a wheatstone bridge, and comparing the unknown quantity to a reference voltage or resistance. The analog multimeter or vom voltohmmilliammeter is constructed using a moving coil meter and a pointer to indicate the reading on the scale. However, if you ever find yourself without internet access, a multimeter is very handy at measuring resistance. Analog multimeters are cheaper than digital multimeters but not as robust or simple to use. A study on multimeter multimeters are very useful test instruments. Analog versions are cheaper to buy and are fine for establishing a current, but if you need a level of accuracy, a digital version is much.
No matter what youre testing, the black test lead will always plug. The other possibility is that the circuit or component you are testing doesnt have continuity that is, it has infinite resistance. An introduction to the digital multimeter wisconline oer. They are used to test, adjust, and troubleshoot electric and electronic circuits. In this article we will learn how to use a digital multimeter and how this will help us in our journey with electronics, this will be a very basic article which will take your through the different operations of a multimeter will illustrative pictures and videos. Typically the analogue test meter will have the main meter dial, and below this there will be a switch for the range. This unit of the universe of instrumentation is important as many other instruments depend on digital volt, ohm and continue reading digital multimeters. If you set the range too low, the multimeter simply reads 1 or ol, indicating that it is overloaded or out of range. A typical multimeter can measure voltage, current, and resistance. Measuring current and voltage calculating power and resistance background information and prelab activity materials. Digital multimeters combine the testing capabilities of singletask metersthe voltmeter for measuring volts, ammeter amps and ohmmeter ohms. How to use a multimeter kindle edition by pickering, martin. Use a multimeter no more scratching your head at malfunctioning appliances. Digital multimeter is a device which has two words in its name.
Voltage is measured across a component, but current flows through a component. A multimeter or a multitester, also known as a voltohm meter or vom, is an. I learned how to use a fluke multimeter simply multimeters. Multimeter safety 1 multimeter safety read this information before using the meter. Do not let your multimeter get wet and never store it in a damp place. You can selectively apply a background to only specific pages or page ranges in one or more pdfs. Digital multimeter working principle electrical academia. Both ac and dc currents can be measured with a multimeter by connecting the meter in series with the circuit, in which current being measured provided the current in that circuit is limited or controlled by a load or appropriate values of resistance. Current measurement using multimeter electronics hub. By knowing a multimeters resolution, a technician can determine if it is possible to see a small change in a measured signal.
Analog versions are cheaper to buy and are fine for establishing a current, but if you need a level of accuracy, a digital version is much more suitable. A pdf supports only one background per page, but the backgrounds can. The less expensive multimeters dont generally tend to have a whole lot of. Jan 16, 2016 his 3part series on how to use a multimeter is one of the best ive seen. One analogy to use for the switchs function that makes sense with the schematic is a drawbridge.
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