Testing electronic components with a multimeter youtube. Using component test on the fluke 867b graphical multimeters. Basic multimeters measures voltage, current and resistance, while more elaborate multimeters, such as the fluke 78, or fluke 88 have featues that can. Digital multimeters dmm, dvom have a numeric display, and may also show a. Many of us when starting in the field of electronic repair check each electronic component one by one by removing it out from the board. Testing electrical systems with a digital multimeter perhaps the most important tool youll use in troubleshooting auto electrical systems is the multimeter. Active components are those, they actually processing, when signal passes through it. Files are classified according to their length, cut of teeth and. Multimeters are a tool that we use to measure multiple characteristics of electronics. Analogue and digital multimeters have either a rotary selector switch or. This compilation is not intended as a complete survey of the field of electrical and electronic equipment testing. Test lead resistances and contact resistances are automatically reduced using this method. Testing components electronic circuits and diagrams.
The first describes the testing of various electronic components, assemblies, and systems. Every fixer should know their way around a multimeter, which has just north of a zillion uses for testing electronic components and circuits. The power onoff switch on the multimeter does various tasks. Click on the dmm button in the instrument launcher when it appears. Advanced ones check properties such as capacitance and transistor gain, but even the most basic ones are able to measure resistance, voltage and current. That is why most meters have a separate jack for high current measurements. There are dmms of all shapes and sizes each with their own specific functions. I use a multimeter for some basic sanity checks and. Follow along to master the three most basic functions of a multimeter. Multimeters can cost thousands of dollarsand are often. Learn the easy way to test electronic components and perform electronics.
The gmm supplies a sinewave of voltage to the component under test and then plots the voltage vs current relationship on the display. Resistors a twoterminal passive component that opposes the flow of current reduces the electric current and at the same time lowers the voltage levels in a circuit. Testing electrical systems with a digital multimeter. Easy way how to test capacitors, diodes, rectifiers on. Full text of testing electronic components by colin mitchell. If you are using the highcurrent setting, be sure to use the right jack. The ce mark is not, therefore, a guarantee of independent testing.
How to test electronic components linkedin slideshare. A continuity test tells us whether two things are electrically connected. Analog multimeters use a microammeter with a moving pointer to display readings. Voltage measurements using a test meter are very straightforward to make. If all the inputs to the board appear to be correct, further tests can be undertaken using a multimeter for the fault finding and to track down the problem.
Two probes are plugged into two of theports on the front of the unit. If you are in the electronic repair line you would know that checking electronic components in electronic boards can take up lots of your time especially if you do not know the short cut way to test it. Check out this post for more info on how to use a multimeter. To check if the resistor is in good condition or broken, we use a multimeter.
These boards are essential for testing and prototyping circuits because no soldering is needed. Touch the test leads to the resistor or nonenergized component to be measured. Full text of testing electronic components by colin mitchell see other formats. How to test electronic components using multimeter youtube. Measuring dc voltage and resistance basic multimeter. Com stands for common and is almost always connected to ground or of a circuit. Best easy way how to accurately test diodes, capacitors, bridge rectifiers in tv powersupply boards, how to use multimeter to test or read tv parts in power circuit boards commonly in lcd.
As you proceed through this lesson, observe and follow directions carefully. Simply set the meter and place the probes across the points to be measured. General guidelines always test the 3 before using it to make sure it is operating properly. It will likely share a spot on the dial with one or more functions, usually resistance. The resistor is an electronic component that has electrical friction. This is becausethe meter is actually measuring a voltage across a component and calling it aresistance. Testing electrical and electronics components and devices with multimeter. Inspect the test leads before using to make sure there are no breaks or shorts. A digital multimeter has a set of digits on the display and an analogue multimeter has a scale with a. 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. Diode test using a multimeter how to test a transistor with a multimeter. When youre testing components, always start with continuity. Ive looked long and hard for a good, lowcost multimeter and the vc830l is everything i need in a daytoday multimeter. Basic electronics troubleshooting and repair ebook is in pdf format.
Jestine yong reserves the right to use the full force of the law in the protection of. Our webiste has thousands of circuits, projects and other information you that will find interesting. The first procedure is to check the diode action between the gate and. The fourwire ohms method is often used in automated test applications where long cable lengths, numerous connections, or switches exist between the multimeter and the deviceundertest. Current measurements require a little more preparation the meter needs to be. A digital multimeter measures voltage and resistance. Three primary electronic components are used in circuits.
A digital multimeter dmm is one of the most common tools on a makers bench. Set the functionrange switch to the appropriate resistance ohms range shown above. Use the 2000k range when testing for resistanc e values in electronic components such as resistors and potentiometer. The most basic things we measure are voltage and current. Clean the contacts with a small file and bend the metal strips to the contacts so. Now connect both ends of resistor with the avo or digital multimeter terminals. Test each pair of leads both ways six tests in total. Feeders and short branch circuits, distribution panel devices. A multimeter can be used to test scrs quite effectively. Motors, capacitors and power conversion equipment, such as variable speed drives, can be prime generators of spikes. Use either a voltage detector wand or a digital multimeter.
For this purpose, take avo meter or digital multimeter and select resistance in avo meterrotate the knob to the. The selection knob allows the user to set the multimeter to read different things such as milliamps ma of current, voltage v and resistance. Using component test on the fluke 867b graphical multimeters introduction the fluke 867b provides you with the unique ability to test electricalelectronic components in an unpowered circuit. The capacitor stores energy in an electrical field, the inductor stores energy in a magnetic field, and a resistor increases the. Some components can be electrically ok, but a voltage check can ensure it is mechanically ok. Connect the mydaq to your computer system with the proper software installed. Join rae hoyt for an indepth discussion in this video, testing components with a multimeter, part of learning arduino. Learn in testing electronic components using multimeter. These circuits can be damaged or destroyed by high current flow. The specifications of the components are notes taken from the manual or data book given with the. A typical multimeter can measure voltage, current, and resistance. How to check basic electronic components using a multi. Just like with resistance testing, youll need to manually set the expected range and make sure both the multimeter can handle the maximum expected voltage. The internet also allows us easy interaction with other technicians around the world and manufacturers tech support to exchange ideas and information and.
Abcs of multimeter safety multimeter safety and you voltage spikesan unavoidable hazard as distribution systems and loads become more complex, the possibilities of transient overvoltages increase. Assemble the circuit shown in figure using mysnap kit. Basic electrical and electronic components passive devices devices or components which do not require external source to their operation. An electric circuit becomes an electronic circuit when it has one or more active components. Use mydaq digital multimeter dmm to test mysnap components if they appear to be. If you need to find out whether electronic components or circuits work, you can easily test them in your home with a multimeter. Knowing the basics of using a multimeter will be a great help in your troubleshooting efforts. The activities will include the assembly of a range of electronic components such as resistors fixed and variable, capacitors fixed and variable, diodes. How to check electronics parts using a multimeter our.
The diode test using an analogue multimeter can be extended to give a simple and straightforward confidence check for bipolar transistors. This friction opposes the flow of electrons and thus reduces the voltage pressure placed on other electronic components b y restricting the amount of current that can pass through it. A multimeter or a multitester, also known as a vom voltohmmilliammeter, is an electronic measuring instrument that combines several measurement functions in one unit. This process may be amplification, modulation, frequency conversion etc. Accordingly this type of test is exceedingly useful in a number of areas of electronics test and repair. Almost all of our parts and service manuals and schematics pdf files are obtained via the internet. Introduction to basic electronics, electronic components and projects. Practical troubleshooting of electronic circuits for engineers and. An electronic circuit is composed of various types of components. Multimeters are instruments that allow the user to test or measure electronic components. Digital simply means the information is presented digitallyrather than through an analog gauge. How to test electronic components with a multimeter our.
Testing components with a multimeter linkedin learning. The reason we call it a multimeter is because they can take multiple types measurements of electrical properties within a circuit. How to use a multimeter to test resistors techrepublic. When testing a particular transistor circuit, a multimeter can be used to determine if the voltages around the circuit are correct. How to test electric components with a multimeter freds. How to use a digital multimeter tutorial australia. Next to your soldering iron,this is the most important tool in your repertoire. Identification of basic electronic components their characteristics.
Continuity testing using multimeter turn the dial to continuity test mode. A leading cause of failure in fitness equipment is insufficient power to the internal components of a machine or no power at all. Multimeters contain sensitive circuits capable of precision measurements of tiny currents and voltage. One may prefer to use a voltmeter for troubleshooting problems, another. With the test probes separated, the multimeters display may show ol and if required, press the continuity button. We use dmms to take electrical measurements in a fast and relatively accurate way.