How to Use a Digital Multimeter
A multimeter is an instrument that allows us to make multiple electrical measurements using the same tool. We can use a multimeter as: A voltmeter to measure voltage. An ammeter to measure current. Secondly, how do you check a multimeter for accuracy? A multimeter is a type of electrical tester designed to help measure alternating current (AC) voltage, direct current (DC) voltage and resistance. Learning how to use a multimeter can help you with a .
A multimeter or a multitesteralso known as a VOM Volt-Ohm meter or Volt-Ohm-milliammeteris an e lectronic measuring instrument that combines several measurement functions in one unit. A typical multimeter would include basic features such as the ability to measure voltagecurrentand resistance. It was said by our teacher that the digital multitester provides more efficient and accurate measurement.
Is it true? And if yes, is there some instances that tge digital multitester cannot give accurate measurement and what are the reasons why sometimes it happens?
What is the use of multitester you. Like Like. And if yes, is there some instances that the digital multitester cannot give accurate measurement and what are the reasons why sometimes it happens? What kind of multi-tester is more easiest to use? Digital multitester is easier how to change app pictures use… but not as highly recommended, Analog Multester teaches us to know the basic we can make an upward knowledge and familiarization with regards to Multitester.
Just some example. Hi: can you help me to know the advantage and dis-advantage in a digital multi-tester? Like Liked by 1 person. Bakit po yung ibang multitester multktester buzer? Nakakaapekto po ba iyon sa pagsukat? Saka po para saan po ba iyong buzer? If somehow I encounter. Sir, is there any other instrument that we can use to measure current voltage aside from multitester? You are commenting using your WordPress. You what is scrum in software testing commenting using your Google account.
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Notify me of new posts via email. Skip to content Home What is Multitester and its Types? Digital multimeters DMM, DVOM display the measured value in numerals, and may also display a bar of a length proportional to the quantity being measured. Digital multimeters are now far more common but analog multimeters are still preferable in some cases, for example when monitoring a rapidly varying value.
Share this: Twitter Facebook. Like this: Like Loading Digital multitester is easier to use… but not as highly recommended, Analog Multester teaches us to know the basic we can make an upward knowledge and familiarization with usr to Multitester Like Like.
What is the most used multi-tester? What are the advantages of using an analog multitester? What are the disadvantage of using Digital Multitester? Leave a Reply Cancel reply Enter your comment here Fill ia your details below or click an icon to log in:.
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Feb 02, · A multitester or multimeter is a device which can be used to gather data about electrical circuits. A basic multitester can measure resistance, voltage, and continuity, while more advanced versions may be able to provide additional data. Feb 24, · While you can test household voltage with a multimeter, electrical-current-testing is limited to low-voltage circuits, such as small direct current (DC) motors or . Jul 26, · jazercrisostomo A multimeter or a multitester, also known as a VOM (Volt-Ohm meter or Volt-Ohm-milliammeter), is an e lectronic measuring instrument that combines several measurement functions in one unit. A typical multimeter would include basic features such as the ability to measure voltage, current, and resistance.
In this tutorial, I will show you how to use a Multimeter. If you are a beginner in electronics, then a Multimeter is probably the simplest and most useful tool to have around. This tutorial is aimed at beginners and will help you get familiarize with a typical Digital Multimeter DMM , explain different parts of a Multimeter, how to use a Multimeter to measure voltage, current, resistance and also test for continuity. A Multimeter, also known as Multi tester, is an electronic measuring instrument which can measure Voltage, Current and Resistance.
It is a very essential tool for electrical and electronics engineers and is usually the first thing to use when troubleshooting a circuit. Multimeters come in different shapes, sizes and price points. Irrespective of the size or price, every Multimeter can measure the most basic parameters like Voltage and Current.
The measured value, whether it is voltage, or current or resistance, is displayed on the LCD Display of the Multimeter. You can set the parameter to measure using the selection knob at the center. Some advanced and slightly costly Multimeters can automatically adjust the range of the value being measured.
These meters are known as Auto Ranging Multimeters. But in our basic meter, we have to manually set the range. Usually, every Multimeter comes with a pair of probes, one Red and one Black. Plug-in the probes in to ports of the Multimeter to make a measurement. Always connect the Black probe to the COM port. Be very careful when using this port and do not use this port for long continuous durations not more than 10s.
Some Multimeters come with backlight for the LCD display. This is useful if you are using the Multimeter in field with poor lighting. Now that we have seen a little bit about Multimeter and its parts, let us proceed with main topic i. First, I will show you how to measure Voltage using a Multimeter. Finally, I will how you how to test for continuity.
Plug-in the correct probes into the Multimeter if they are not already plugged in and set the knob to measure DC Voltage. But there are a bunch of positions in DC Voltage measurement. Which one do you select? The number to which knob points to is the maximum value that we can measure of that particular parameter, DC Voltage in this case.
So, if you set the knob to 20, then you can measure DC Voltages up to 20V. As you can see from the image, there are 5 positions associated with DC Voltage measurement m, m, 2, 20, , In case you want to measure the voltage of a 9V battery, then set the knob to What happens if you set the range lower than the measuring value?
In this case, the LCD will display 1, indicating that the result has exceeded the range. Now, connect the Red probe to the positive terminal of the battery and Black probe to the negative terminal. I took an old AAA battery for testing and connected the probes as mentioned above. The reading was 1.
Now, what happens if you connect the probes in the other way? That is Red probe to negative terminal and Black probe to positive terminal. In this case, the Multimeter displays a negative value with same magnitude.
In a similar way, you can measure the voltage drop across components, voltage at a pin of a Microcontroller etc. Make sure that the probes are properly inserted in to the Multimeter ports without any exposed metal. Do not touch the probes by the tips. AC Mains can be very dangerous. As you can see from the image, this particular Multimeter can measure AC Voltage up to V and has only two range selection positions and Let us measure the Mains AC voltage for the purpose of demonstration.
Personally, I do not recommend beginners to go anywhere near Main AC. I chose because my mains supply is V. Always set the knob for AC Voltage measurement before inserting the probes. While measuring voltage is just placing probes at two different points of the circuit, measuring current is quite different. If you remember basic Circuit Theory, then you might remember that current in components connected in series is same. Using this basic principle, we have to make the Multimeter a part of the circuit so that same current passes through the Multimeter as in the component.
The Ammeter section of the Multimeter is indicated by the symbol A. So, there will be a straight line adjacent to the A to indicate DC Current measurement. This range is sufficient for measuring current in LEDs. I set the range to mA and connected the Multimeter as per the following circuit. Consider the Multimeter in Ammeter mode as essentially a wire through which the current flows to the main circuit. In this configuration, Multimeter becomes a part of the circuit and if you disconnect any probe, then the circuit will not work.
The measured current is displayed on the LCD. One of the easiest measurements you can perform using a Multimeter is that of a resistance. Set the knob to the desired range in the resistance measurement and connect the probes to the leads of the resistor. The measured resistance will be displayed on the LCD. You can connect the probes in any way as the result will not be affected by the orientation of the probes in case of resistance measurement.
Perhaps the most frequently used and one of the easiest functions of a Multimeter is the continuity test. It is used to test continuity from point A to B in a circuit, whether a wire is conducting or not, whether a switch is properly functioning or not.
Set the knob to test for continuity and connect the probes across a wire. If the wire is in good condition without any breakage, then you will hear a continuous buzzer. The continuity test is essentially a low resistance measurement. If the resistance between two points is very less usually few Ohms , then those two points are considered as electrically connected and the buzzer starts the sound.
As a bonus, let us see the Diode Test feature of the Multimeter. Some Multimeters have dedicated diode testing functionality, which can be useful for checking diodes and some special types of transistors as a transistor is essentially two diodes connected back-to-back. The diode test feature is usually combined with continuity test and is represented by a Diode Symbol. To test a diode, set the knob to Diode Test mode and connect the Red probe to Anode of the diode and Black probe to Cathode of the diode.
If the diode is working properly, the Multimeter will display the forward voltage drop across the diode. You learned how to use a Multimeter to measure voltage, current, resistance, continuity test as well as diode test. Your email address will not be published. How to Use a Multimeter? How to Test a Diode?
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