Typically, a multimeter is utilized to make different electrical measurements, for example, AC and DC voltage, AC and DC current, and resistance. A multimeter is a combination of a voltmeter, ammeter, and ohmmeter. This is why it is called a multimeter. With that in mind, the Multimeters have functions, like – diode and congruity tests. So, let’s move forward and find out the different uses of a digital multimeter.
Testing Current
Using a digital multimeter, you can test the current in the least complex way. The main advantage here is that you can take the readings without opening the circuit. At first, you have to find out what type of current you want to test. Whether it is an AC current or is it a DC current?
After deciding the type of current, you will then set a perfect range on the dial and this will allow you to test the current accurately. In short, testing current with a DMM or digital multimeter is a smooth operation.
Testing with a Clamp Meter
If you are using a clamp meter, you are required to open the clamp head. And you will do that by pressing the lever at the beginning. After that, you have to close the head around a conductor and release the lever. Remember that you have to make sure that it has been shut around the conductor fully to take estimation.
Testing with a Standard DMM and Current Clamp Adapter
In this method, you will use a DMM and current clamp adapter. Here, the adapter will modify the existing measurement into voltage. Subsequently, you will set the dial to the AC voltage function and thus, pick a mil-volt range. Next up, you have to plug in the leads and open the clasp connector. Lastly, you will close the clamp head and take a reading.
Testing with a Standard DMM and Test Leads
For examining and measuring the current with an open line, you will first use test leads. This is why you will plug in the leads and set the dial to AC or DC current. It will be based on what you are attempting to test. In the last phase, you will just apply the leads to the open current and thus, take your desired reading.
Testing Resistance
This is a long process where you will first turn off the power in the circuit. Otherwise, you won’t receive an accurate reading and most importantly, it can damage the digital multimeter. After ensuring that all the powers have been switched off, you have to set the dial to a resistance mode.
Then you will pick the most appropriate range on the dial and plug in the test leads. In the next step, you will combine them to the component under test and take your required reading. Be aware of the fact that you will require an accurate contact between the test leads and test circuit.
READ: Instruction on Making a Jelly Bean Dispenser
Testing Continuity
It’s important that all the circuits are consistent. It will allow the current to flow seamlessly. The wires, conveyors, switches, and wire connectors need a greater level of continuity. On the other hand, the fuses and closed switches offer a good level of coherence. In contrast, the blown fuses and open switches have no consistency. A typical continuity test checks if the test leads are good enough to be used with the DMM.
The continuity test on a DMM is a simple one. First, set the dial to the continuity function and plug in your lead. After that, you will shut down the power and make a contact with the component under test by the leads. The DMM will beep if there is a better continuity or a decent way that allows a perfect flow of current. In case, there is no continuity, the DMM won’t beep.
Testing Frequency
We know that frequency is measured in hertz (Hz). It means the number of times each second a waveform repeats. Keeping up the right frequency is critical for different devices that depend on AC voltage and current. In any case, it is important to understand that not all DMMs have an Hz testing capacity.
Now, to test out the frequency, you will set the function switch to Hz and plug in the leads. Then you will connect them to the circuit. Finally, you will read out the measurement to compare and contrast with the listed frequency component under test.
Testing Voltage
To measure the voltage drop across circuit components and the overall voltage throughout a circuit, use the voltage setting. For testing batteries and the majority of minor circuit components, you’ll need the DC voltage option; for testing household circuit components like light switches, fixtures, and outlets, you’ll need the AC voltage setting.
Keep in mind that you can check the voltage without cutting the circuit. Simply place one probe on the hot terminal when evaluating AC voltage or the negative terminal when testing DC voltage. Record the reading by touching the second probe to the opposite terminal.
Bottom Line
Along with all the buttons and features, a digital multimeter is always a complex instrument to discover, yet it doesn’t need to be that kind of scary. All the above methods of using a digital multimeter will help you to understand that it is an essential tool for testing.
What you need to do is that you have to learn how to use one correctly. It will radically grow your testing capacities. Ultimately, your knowledge will make you more accurate without guesswork!