A multimeter, also called a voltohm meter or vom, is a device that measures resistance, voltage, resistance, and continuity. I am showing you a digital multimeter circuit using icl7107. The basics of digital multimeters ideal electrical. Accordingly the measurement time of a digital multimeter, dmm, may not always appear straightforward. Set a digital multimeter to diode test and an analogue multimeter to a low resistance range such as. User manuals, tenma multimeter operating guides and service manuals. Pick out a random resistor and set the multimeter to the 20k.
The test meter or multimeter can trace its origins back to the invention of the galvanometer around 1820. Digital multimeters combine the testing capabilities of singletask metersthe voltmeter for measuring volts, ammeter amps and ohmmeter ohms. The fluke 101 multimeter the product is a 6000 count instrument. Switched range multimeters have the standard v, a and. Digital multimeter dmm the digital multimeter, also known as the dmm or digital voltmeter dvm, is a handy tool that you will use often in this class.
The em860t is a professional true rms digital multimeter with a large 6000 counts backlit lcd display. Multimeters allow the ability to test and gather up to 14 different types of circuitry measurements. The standard and basic measurements performed by multimeter. How to use a multimeter for the beginner sciencing.
Most multimeters can test for the 3 most common variables in a circuit. New digital multimeter for accurate measurement of synchronously sampled. Lawrence university physics slu physics using a digital multimeter department of physics revised. Below the digital readout is a black dial, called the function switch. This digital multimeter is a kind of convenient operation, accurate reading, complete function, small size, easy to carry and use battery as power, handheld and. Test each pair of leads both ways six tests in total. 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 warranted to be free from defects in material and workmanship for a period of one. Digital multimeter model 727740 hereafter referred to as the meter have autorange and manual range options with maximum reading 3999. For example, 2v measures voltages up to 2 volts, and 20v measures voltages up to 20 volts. Datalogger built using a digital multimeter and virtual instrumentation conference paper pdf available may 20 with 912 reads how we measure reads. As mentioned above, the main difference between a digital and analog multimeter is the display.
Take accurate voltage, current and frequency measurements on the output side of the drive at either the drive itself or at the motor terminals. Using analog or digital multimeter in pcb, electronics or mobile phone repairing is must. Lcd for a fee based on then current component acquisition costs. The multimeter or voltage tester for those working in the electricity sector, must have the basic requirements of reliability, accuracy, safety and prac. Guidelines on the calibration of digital multimeters euramet. Multimeter notes in the lab we will use a digital multimeter dmm to measure resistance, voltage, and current in our circuits. Apr 10, 2012 other than that, many professionals choose to use a digital multimeter. If any such product proves defective during this warranty period, tektronix, at its option. We modify them from a normal dc digital voltage meter circuit to smart multimeter. The instruction manual given under the heading of must be.
Digital multimeter is a test equipment which offers several electronic measurement task in one tool. Digital multimeter principles is a must for all technicians, from contractors to maintenance staff. Basic models are capable of measuring voltage, current, and. Do not use this instrument if it or the test leads appear to be damaged, or if you suspect that the instrument might not 9.
Apart from the basic measurement there are a number of other functions that are required and these all take time. A digital multimeter is an indispensable tool for testing, diagnosing, and troubleshooting electrical circuits, components and devices. Theyve been described as the tape measure of the new millennium. This document is highly rated by students and has been viewed 340 times. For example, a multimeter using a moving coil movement with full. Voltage is measured in volts, current in amps and resistance in ohms. The standard and basic measurements performed by multimeter are the measurements of amps, volts, and ohms. Dustproof, waterproof, shockproof multimeter designed to withstand the toughest environments.
Multimeters may use analogor digital circuitsanalog. Nov 30, 2016 multimeters can be used to help diagnose pretty much any part of your circuit. Simple instructions on how to use a digital multimeter. Do not attempt to make a voltage measurement if a test lead is plugged in the a or ma input jack. So if youve measuring a 12v battery, use the 20v setting. Farnell dm1 digital multimeter instruction book farnell instruments ltd. To take several experimental measurements and compare them. By amer technical pu pdf digital multimeter principles book by amer technical pu are a good way to achieve details about operating certainproducts. The most basic things we measure are voltage and current. As a result, dmms are one of the most indispensable pieces of test equipment.
This multimeter has been designed according to iec610101 concerning electronic measuring instruments with an overvoltage category cat ii and pollution 2. Galvanometers were large instruments that gave a deflection when a current passed through its coil. This document gives guidance on measurement practices in the specified fields of measurements. The product is battery powered with a digital display. No matter what youre testing, the black test lead will always plug into the com.
Also set the negative wire to ground and the positive to the point where you are measuring the current. The model 727765 multimeter hereafter referred as the meter is a 3 34 digits with steady operations, fashionable design and highly reliable handheld measuring instrument. Multimeters are a tool that we use to measure multiple characteristics of electronics. Do not measure voltages when the meter is set to measure resistance. At the end of this article you will learn how to measure voltage with multimeter, measure dc current, check for.
The digital multimeter displays the reading in digits most times on a led or lcd screen. An introduction to the digital multimeter by patrick hoppe. After reading it, keep it together with the product for reference to it when necessary. This instruction manual explains how to use your new digital multimeter ps8a safely, before use, please read this manual thoroughly. How to use a digital multimeter measure voltagecurrent. Successful completion of tasks covered in the textbook can be documented by a certificate of completion included in the textbook. In this learning activity youll explore the functions and proper operation of a digital multimeter. Digital multimeter dmm electronic volt ohm millimeter with digital display.
There are pushbuttons on the meter to indicate which type of measurement is being made, and other pushbuttons to select the range scale for the measured values. The hioki dt4200 digital multimeter series consist of a complete lineup of 9 models ranging from professional to industrial to pocket types. To gain an understanding of how to use a multimeter to measure voltage, resistance and current. Jan 16, 2016 his 3part series on how to use a multimeter is one of the best ive seen. Always use the fuses of the correct type as specified within the instructions to avoid any injury, electrical shock, or risk of fire. 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. 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. Within pages of the book and minutes of video, i was completely lost, confused, and bored. A warning identifies conditions and procedures that are dangerous to the user. Although both digital and analog multimeters measure varying units, such as voltage, current, and resistance, they display their readings in. How to use a digital multimeter what is a multimeter. Voltage, current and resistance are the three most fundamental components of electricity.
Mar 27, 2020 i am showing you a digital multimeter circuit using icl7107. Safety information the fluke 101 complies with iec 610101 cat iii 600 v measurement category. For example, measure dc voltage, acv, dc amp meter, ac amp meter and as the ohms meter, etc. Ms8233e digital multimeter users manual digital multimeter 2000 counts autorange func hold ms8233e i e c 6 1 0 1 01 i 6 i 0 t 0 a v c off off v v temp. Try to build this project to use it really worth and fully enjoy. Do not apply the multimeter to voltages that may exceed 500v. It accurately measures ac and dc voltage and current, resistance, capacitance, temperature, frequency, and duty cycle, as well as continuity, diodes, and features a noncontact voltage detect.
Then hold the probes against the resistor legs with the same amount of pressure you when pressing a key on a keyboard. It is an inexpensive portable measurement device with nice features for measuring static not changing in time electronic properties. To avoid electric shock or personal injury, read the safety information and rules for safety operation carefully before using the meter. Jan 09, 2017 digital multimeters are indispensable tools that allow you to analyze circuits and diagnose problems in your electrical design. Digital multimeter layout the top portion of the meter contains the digital readout area which displays the measurement value.
Warning unpacking inspection open the package case and take out the meter. What is a dmm digital multimeter electronics notes. In order to ensure the safety of the user, iec 60664 defines the ranges of use of measuring instruments by classifying power levels into measurement categories. Multimeter measurements on adjustable speed drives. Follow all safety and operating instructions to ensure that the meter is used safely and is kept in good operating condition. Simple instructions on how to use a digital multimeter our. Nov 20, 2015 apr 06, 2020 notes digital multimeters notes edurev is made by best teachers of. Oct 02, 2014 digital multimeter layout the top portion of the meter contains the digital readout area which displays the measurement value. Get digital multimeter principles book by amer technical pu pdf file for free from our online library. Digital multimeter em830 series tl712 users manual 110981 id.
Digital multimeter model no msru 1 safety information this operating manual covers information on safety and cautions. The function switch dial is turned to select the meters function. Observe the display to obtain the current in amperes. Understanding how to use a multimeter is important for everything from testing batteries and fuses, to diagnosing component and circuit failures. Never rotate the dial of the multimeter while it is still connected to the circuit as doing so may damage the instrument. Initially all test meters were analogue as digital technology was still many years into the future. Pdf an approach to the design of a digital multimeter based on the use of dualslope adc is described in this paper. Apr 06, 2020 notes digital multimeters notes edurev is made by best teachers of. A digital multimeter dmm may look complicated and intimidating at first glance, but once you understand the display, dial, and port panel, youll have a better grasp of dmm basics. Pdf new digital multimeter for accurate measurement of. Digital multimeter principles is part of a comprehensive instructional package and is a must for all technicians, from contractors to maintenance staff. There are pushbuttons on the meter to indicate which type of measurement is being made, and other pushbuttons to select the.
An introduction to the digital multimeter wisconline oer. Learn how you can make all kinds of electronic measurements using a cheap, portable instrument called digital multimeter. Thereafter, for the lifetime of the dmm, fluke will replace the. The baseemitter be junction should behave like a diode and conduct one way only. An analog multimeter, although older than the commonly preferred digital multimeter, does come with several unique advantages. Please read the relevant information carefully and observe all the warnings and notes strictly.
Digital multimeter em830 series tl712 users manual. Analog or digital multimeter simply smarter circuitry blog. Make sure that the power is turned off before working on the power circuit. Dmms are available very cheaply and these digital multimeters can provide very high degrees of accuracy when measuring the parameters within an electronics or electrical circuit. Jul 31, 2018 digital multimeter is a test equipment which offers several electronic measurement task in one tool. Safety notes these meters have been produced to comply with category ii requirements under iec publication 10101, safety require ments for electronic measuring equipment and with ul 1244. Auto power off function 15 mins shell type pocket size multimeter.
Any meter will load the circuit under test to some extent. A multimeter ora multitester, also known as a voltohm meter or vom is, an. This fourth edition has been updated to include the latest nfpa 70e safety requirements, dmm features and accesories, and safety practices in the field. Auto range multimeters have fewer options and are usually limited to v volts. It is also known as the voltmeter or ohm meter or volt ohm meter. When the multimeter is used as a voltmeter or an ohmmeter, you will insert two wires into the meter. Read online now digital multimeter principles book by amer technical pu ebook pdf at our library. Do not operate the meter around explosive gas, vapor, or dust.
A digital multimeter is a musthave for any toolbox, but theres a learning curve involved. A typical multimeter may include features such as the ability to measure. Comparison of digital and analog meter can be damaged when dropped from. Summary of contents1 fluke multimeter user manual2 klein multimeter user manual3 mastech multimeter user manual4 craftsman multimeter user manual5 amprobe am530 multimeter user manual6 fieldpiece hs33 multimeter user manual7 tacklife cm02a multimeter user manual8 uei test instruments dl369 multimeter user manual9 extech ex330 autoranging mini multimeter user manual10 etekcity msrc600 digital.
Digital multimeters implement two types of measurement. Data sheet function range accuracy specifications at 23 c 5 c, multimeter the product is a 6000 count instrument. The multimeter displays 0 ohms with the leads shorted together. Radio shack auto range digital multimeter manual 22 163 by. Get radio shack auto range digital multimeter manual 22 163 pdf file for free from our. Set the multimeter to the ac or dc modes to begin measuring current.
One year full warranty on craftsman manual ranging multimeter if this craftsman manual ranging multimeter fails to give complete satisfaction within one year from the date of purchase, return it to the nearest sears store or other craftsman outlet in the united states, and sears will replace it, free of charge. Each digital and analog multimeter below is designed for durability, safety, and high accuracy. Make sure that your fingers are behind the finger guards when using the test leads. A digital multimeter or dmm is one of the most widely used pieces of test equipment today. You have to set the multimeter to a range that it can measure. To avoid electric shock or personal injury, read the safety information and rules for safe operation carefully before using the meter. Pdf datalogger built using a digital multimeter and. With proper use and care, th is digital multimeter will give you years of satisfactory service. One of the key areas of understanding how a digital multimeter works is related to the measurement time. This instrument is portable digital multimeter designed for measurement of weak current circuits.