Other advantages include higher input impedances, which will not load down sensitive circuits, and input protection. How to use a multimeter beginners guide random nerd. To check the relay whether its good or faulty one, we need to check the resistance of a coil. The dt9205a multimeter offers you several amplitudes of measurement with which to test electrical components for voltage, resistance or continuity. Inspect the test leads before using to make sure there are no breaks or shorts. The first step to take is to connect the negative probe into the com port of the multimeter step 2 the following step is to connect the positive probe lead to the fused v. Multimeter guide for dummies the customize windows. In the relay, there is a coil and that coil has some resistance, using that resistance knowledge we can find that the relay is a good one or not. The first digital multimeter was introduced in the late1970s, and has proven much more accurate and reliable than the old needlebased analog meters. Multimeter measuring guide for dummies a multimeter is an electronics testing device that, um, tests multiple things, including resistance, voltage, and current. Smathers hunker may earn compensation through affiliate links in this story.
This digital insulation camp meter is a handheld 6000 count instrument that is designed for use in the laboratory, field servicing, at home. Analog multimeters are cheaper than digital multimeters but not as robust or simple to use. Multimeters can be used as an ammeter, a voltmeter, an ohmmeter. This series are a series of compact pocketsized 312 digit multimeter. A digital multimeter or dmm is a useful instrument for measuring voltage, current and resistance, and some meters have a facility for testing. If what youre doing is related to electricity in any way, chances are youll use a multimeter at some point. Features of digital multimeter digital multimeter is the most advanced instrument that makes use of modern integrated circuits for making electrical measurements. It has everything needed in an hvac meter including temperature and microamp measurements to quickly troubleshoot problems with hvac equipme nt and flame sensors. How to use a multimeter for dummies your garage guide.
Test the 3 before using it to make sure it is operating properly. New digital multimeter for accurate measurement of synchronously sampled. How to verify electrical test tool operation with a proving unit. Ive looked long and hard for a good, lowcost multimeter and the vc830l is everything i need in a daytoday multimeter. Before using a digital multimeter, be sure to read and fully understand the instructions and warnings outlined in the owners manual. Your multimeter might also have a dedicated setting for testing the amperage of aa, aaa, and 9v batteries. The post explains how to test mosfets using multimeter through a set of steps, which will show help you to accurately learn the good or faulty condition of a mosfet. Your multimeter leads probes pincer clips good for working with breadboard wiring you will use the multimeter to understand and troubleshoot circuits, mostly. But once youve bought a multimeter, how do you make the most of all the features it has to offer. A multimeter is an essential tool in any electronics lab. Youll get it right when you understand how the device works and. Home technical articles basic measuring of resistance, voltage and current using digital multimeter few words about digital multimeter digital multimeter has generally replaced the analogtype multimeter as the test device of choice for maintainers because they are easier to read, are often more compact and have greater accuracy. View and download innova 3320 owners manual online. One particularly usefull skill is knowing how to test a transistor using a digital multimeter.
Never apply power to the circuit when measuring resistance with a multimeter. Pick out a random resistor and set the multimeter to the 20k. Specialized component analyzers exist to do this task, but the expense can be difficult to justify for the average hobbiest. Multimeter is also called multitester or vom volt ohm millimeter. This tutorial will show you how to use a digital multimeter dmm, an indispensable tool that you can use to diagnose circuits, learn about other peoples electronic. Pay close attention to warnings stamped on the front and rear of the meters case. Learn how to use digital multimeter and how to measure acdc voltage, dc current, resistance, check continuity of a circuit with multimeter and also check components using diode mode in multimeter. Basic measuring of resistance, voltage and current using digital multimeter many have such features as peakhold display that provides shortterm memory for capturing the peak value of transient signals as well as audible and visual indications for continuity testing and level detection. Step 3 the next step is to turn the multimeter on my. Previously, we have talked about the theoritical basics about a typical multimeter and in this multimeter guide for dummies we will learn how to use a multimeter for diy electronics works as well as in everyday life.
For this test, you can view the transistor as two diodes connected as shown in below figure for both npn and pnp transistors. Page 1 operators instruction manual digital multimeter page 2 safety information this multimeter has been designed according to iec. This digital multimeter is intended for indoor use only. The astroai true rms digital multimeter is designed to be safely and accurately used by professionals in a commercial setting or weekend dyers that need a little more utility from their standard digital multimeter. Pdf astroai am33d digital multimeter tutorial start. Simple instructions on how to use a digital multimeter. This digital code is decoded using the range of information and displayed.
Heres a look at the features and capabilities of dmms, as well as how to use them safely. This transistor came out of a samsung plasma tv, but is widely used. You can measure several different magnitudes of these quantities. How to use a multimeter spardun wc830l digital matheter. Then hold the probes against the resistor legs with the same amount of pressure you when pressing a key on a keyboard. Mosfets are outstanding devices when it comes to amplifying or switching of various kinds of loads. In this beginners guide, weve shown you how to use a multimeter.
Using your arduino, breadboard and multimeter eas 199a fall 2010 work in teams of two. They are available in two varieties, analog and digital. Have someone check on you periodically if working alone. Use these procedures to increase the life of your soldering iron tip when using leadfree solder. Always set the multimeter to read voltage after you finish using it. You wont get the voltage value on the meters display if you left the device in current mode. A digital multimeter is an indispensable tool for testing, diagnosing, and troubleshooting electrical circuits, components and devices. 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. Pdf new digital multimeter for accurate measurement of. The base current in a transistor is very small compared to the. The most basic things we measure are voltage and current. To avoid possible electric shock or personal injury, and to avoid possible damage to the meter or to the equipment being tested, adhere to the following rules. All digital meters contain a battery to power the display so they use virtually no power from. Warning inspect the digital multimeter for damage to the case.
A transistor amplifies current because the collector current is equal to the base current multiplied by the current gain, b. This tutorial will show you how to use a digital multimeter dmm, an indispensable tool that you can use to diagnose circuits, learn about other peoples electronic designs, and even test a battery. Using analog or digital multimeter in pcb, electronics or mobile phone repairing is must. Thats why it is also called multiple measurement maters multimeter manual. I use a multimeter for some basic sanity checks and some rough measurements. The sparkfun digital multimeter, h favorited favorite 40. Pdf how to use a digital multimeter prasetiyo lukman. This is an integral tool in dealing the electronic circuits and even to check a battery. It can be tricky to get precise voltage and resistance readings when using a multimeter for the first time.
How to use a digital multimeter measure voltagecurrent. A digital multimeter, sometimes known as a digital voltmeter or dvm slightly inaccurately as it measures amps and ohms as well as volts, is an instrument which is used for making electrical and electronic measurements. Have a complete understanding of circuit being measured. Multimeters are a tool that we use to measure multiple characteristics of electronics. There are two types of voltage ac and dc, but because this is a beginners guide, well stick with dc voltage. Here surely you will learn the use of digital multimeter. 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. Fully read and understand this manual before using this instrument. What to look for in a multimeter and how to use a multimeter to measure voltage, current, resistance and continuity. How to use digital multimeter pdf books quranmualim,digital multimeter pdf, multimeter parts and function pdf, types of multimeter pdf. How to use a multimeter to measure voltage, current and. The diode test using an analogue multimeter can be extended to give a simple and straightforward confidence check for bipolar transistors. How to validate a pump control panel repair with a thermal multimeter. To avoid causing harm or havoc, here are various precautions that you should follow when using a digital multimeter.
Measure dc and ac voltage, current, diode and audible continuity, and resistance with the convenience of one single tool with builtin overload protection. Though transistors are also largely applied for the above purposes, both the. Since a voltmeter measures the voltage across itself, it should be connected in parallel. Again the test using a multimeter only provides a confidence check that the bipolar transistor has not blown, but it is still very. How to use a digital multimeter for dummies housetechlab. This setting is usually denoted with the battery symbol. These warnings, as well as all warnings and precautions used through out this manual, must be followed. Digital multimeters are an important part of many professions and hobbies. How to test a relay with a multimeter step by step guide. In this video i demonstrate how to test a mosfet transistor with a digital fluke multimeter in the off state and the on state. Do not use if cracked, distorted, excessively dirty or any abnormal condition exists.
A digital multimeter can be used as a fast and simple way to check a transistor for open or shorted junctions. Diode test using a multimeter how to test a transistor with a multimeter. In this article, well go through the basics of using. 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. How to troubleshoot a pump control panel with a thermal multimeter. Digital multimeters can test diodes using one of two methods. How to use the digital multimeter dt9205a by michael o.
Before diving headlong into how to use your new multimeter. One of the most important step of progressing in diy electronics work is knowing to use a multimeter. The basecollector junction is one diode and the baseemitter junction is the other. A digital multimeter is a very useful tool for checking electronics circuits and parts, and testing batteries.
Using certain multimeter models, you can test to be sure that components such as diodes, capacitors, and transistors. How to use digital multimeter pdf books quranmualim. Youve learned how to measure voltage, current and resistance, and how to check continuity. Check the relays coil terminals using a multimeter. This instruction manual explains how to use your new digital multimeter ps8a safely, before use, please read this manual thoroughly. The digital multimeter dmm is an essential tool in every electronic enthusiasts arsenal. Basic measuring of resistance, voltage and current using. The meter cannot be used to test ac current and cannot be used to test ac voltage. Another common test with a digital multimeter is testing dc voltage. If playback doesnt begin shortly, try restarting your device. Multimeter measuring guide for dummies smps troubleshooting. Objective to become familiar with a digital multimeter dmm and how it works. Digital multimeter working principle analyse a meter. Pdf an approach to the design of a digital multimeter based on the use of dualslope adc is described in this paper.
How to test a mosfet transistor using a multimeter youtube. Astroai user manual true rms digital multimeter thank you for purchasing the true rms 6000 count digital multimeter from astroai. There are two common types of multimeters, analog and digital. How to use a digital multimeter what is a multimeter. Follow all safety and operating instructions to ensure that the meter is used safely and is kept in good operating. Multimeters are used in all areas of electronics to determine the voltage, amperage or resistance in an electrical circuit. The basics of digital multimeters ideal electrical. Compact truerms meter for hvac troubleshooting the fluke 116 was specifically designed for the hvac professional. In some cases it may be necessary to remove one end of the diode from the circuit in order to test the diode. They use a liquid crystal display lcd technology to give more accurate readings. In this article, weve put together various safety precautions that a multimeter user should know about when using this versatile device. Digital multimeters and clampmeters use different techniques internally, to measure ac, dc voltage, resistance and amperes.
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