# Pliers ammeter! What is it and how does it work?

The electric current is a fundamental electrical quantity of nature, and knowing how to measure it is of utmost importance to work with it or make calculations such as, for example, the calculation to know the consumption of an electric charge. And to measure the electric current, the clamp meter is a device that facilitates this measurement on many levels. But what is a clamp meter? How to use clamp meters? In this article, we will answer those questions and more. Come on, guys!

Clamp Meter: What is it?
The clamp meter is a measuring instrument that, technically, is a multimeter that has a plier format and also the function of measuring current indirectly. It can also be defined as a device that internally has the function of ammeter and voltmeter. It is used by many electricians around the world, as it allows the measurement of electrical current without interrupting the electrical circuit.

When the ammeter acts as a multimeter with the function of measuring current indirectly, it has two probes and can be used as a “multimeter pliers”, being able to measure direct current (DC), alternating current (AC), voltage continuous (VDC), alternating voltage (VAC), resistance (Ω), continuity and diode. Otherwise it is just an ammeter.

Clamp Meter What is it

Clamp Meters: How does it work?

The electric current is a fundamental electrical quantity of nature, and knowing how to measure it is of utmost importance to work with it or make calculations such as, for example, the calculation to know the consumption of an electric charge. And to measure the electric current, the clamp meter is a device that facilitates this measurement on many levels. But what is a clamp meter? How to use clamp meters? In this article we will answer those questions and more. Come on guys!

Clamp Meter: What is it?
Clamp meter is a measuring instrument that, technically, is a multimeter that has a plier format and also the function of measuring current indirectly. It can also be defined as a device that internally has the function of ammeter and voltmeter. It is used by many electricians around the world, as it allows the measurement of electrical current without interrupting the electrical circuit.

When the ammeter acts as a multimeter with the function of measuring current indirectly, it has two probes and can be used as a “multimeter pliers”, being able to measure direct current (DC), alternating current (AC), voltage continuous (VDC), alternating voltage (VAC), resistance (Ω), continuity and diode. Otherwise it is just an ammeter.

Clamp Meter What is it

Clamp Meters: How does it work?
The operation of the clamp meter is very simple! When he is going to perform the current measurement function via pliers, he uses only his clamps.

When an electrical cable is energized, a flow of electrical current passes through it and this flow generates a magnetic field. When a live cable is between the clamp clamps, the magnetic field of the cable comes into contact with a coil in the clamps and induces an electrical voltage.

This voltage that is induced by the magnetic field ends up generating an electric current inside the device and this current is read by the device, which calculates the electric current and shows it on the digital panel of the clamp meter.

Digital Clamp Meter: How to use?
The clamp meter is capable of making more than one type of measurement, so we will teach you how to make each of the most used measurements starting with the main one, which is the measurement of electrical current with the clamp.

How to measure electrical current
For this measurement, it is necessary to remove the probes from the digital clamp meter, so that no accident or anything like that occurs.

Position the clamp meter on the type of current to be measured (AC or DC) and on the maximum current scale, so that the equipment does not burn if the current is higher.

Separate a cable that is running current and places it between the clamps individually, do not measure two conductors in the same pliers, as it may cause a wrong reading or even the appliance to burn. After placing the cable inside the clamp pliers, the device will measure the electric current and print it on the digital panel. It is important to know that some clamp meters do not measure direct current.

The electric cable on the ammeter
Measurement of Electric Current in Clamp Clips

How to measure electrical voltage
For continuous tension: Place the pliers in the (V—) position and at the maximum scale, connect one probe to the positive pole and the other probe to the negative pole, the measurement will be performed after that.
For alternating voltage: Place the pliers in the (V ~) position and at the maximum scale, place a probe in one phase and the other probe in neutral or in the second phase, the measurement will be performed after that.
How to measure continuity
Place the device in the continuity position and make a test with the test leads touching each other, if it beeps, it is because the pliers are working correctly, otherwise, it is important to test the test leads and the battery before taking it to assistance, as it may be a problem that is not exactly the clamp meter.

With the pliers working correctly, place a probe at the beginning of the circuit and the other probe at the part you want to check if there is continuity there if you whistle it is because it has continuity if you do not whistle it is because the circuit is interrupted.

How to measure resistance
Place the pliers in the resistance position (Ω) and at the maximum scale, place each probe on one side of the resistance, the measurement will be performed after that.

The diode measurement is the same as the previous measurement, but with the pliers in the diode measurement position.

Digital Clamp Meter Class
A crucially important factor to observe is the category of the device you will be working on, making a measurement with the wrong category device can cause a very serious accident.

The clamp meter follows the same categories as the multimeter, so before taking a measurement or buying a clamp meter, look at the category it serves.

Classification of categories
Multimeter categories, see what they are!

Now that you know how to use a clamp meter, would you know how to measure current in an electrical panel? If not, watch this video from the Mundo da Elétrica channel that will show you how this measurement is made.

operation of the clamp meter is very simple! When he is going to perform the current measurement function via pliers, he uses only his clamps.

When an electrical cable is energized, a flow of electrical current passes through it and this flow generates a magnetic field. When a live cable is between the clamp clamps, the magnetic field of the cable comes into contact with a coil in the clamps and induces an electrical voltage.

This voltage that is induced by the magnetic field ends up generating an electric current inside the device and this current is read by the device, which calculates the electric current and shows it on the digital panel of the clamp meter.

Digital Clamp Meter: How to use?
The clamp meter is capable of making more than one type of measurement, so we will teach you how to make each of the most used measurements starting with the main one, which is the measurement of electrical current with the clamp.

How to measure electrical current
For this measurement, it is necessary to remove the probes from the digital clamp meter, so that no accident or anything like that occurs.

Position the clamp meter on the type of current to be measured (AC or DC) and on the maximum current scale, so that the equipment does not burn if the current is higher.

Separate a cable that is running current and places it between the clamps individually, do not measure two conductors in the same pliers, as it may cause a wrong reading or even the appliance to burn. After placing the cable inside the clamp pliers, the device will measure the electric current and print it on the digital panel. It is important to know that some clamp meters do not measure direct current.

The electric cable on the ammeter
Measurement of Electric Current in Clamp Clips

How to measure electrical voltage
For continuous tension: Place the pliers in the (V—) position and at the maximum scale, connect one probe to the positive pole and the other probe to the negative pole, the measurement will be performed after that.
For alternating voltage: Place the pliers in the (V ~) position and at the maximum scale, place a probe in one phase and the other probe in neutral or in the second phase, the measurement will be performed after that.
How to measure continuity
Place the device in the continuity position and make a test with the test leads touching each other, if it beeps, it is because the pliers are working correctly, otherwise, it is important to test the test leads and the battery before taking it to assistance, as it may be a problem that is not exactly the clamp meter.

With the pliers working correctly, place a probe at the beginning of the circuit and the other probe at the part you want to check if there is continuity there if you whistle it is because it has continuity if you do not whistle it is because the circuit is interrupted.

How to measure resistance
Place the pliers in the resistance position (Ω) and at the maximum scale, place each probe on one side of the resistance, the measurement will be performed after that.

The diode measurement is the same as the previous measurement, but with the pliers in the diode measurement position.

Digital Clamp Meter Class
A crucially important factor to observe is the category of the device you will be working on, making a measurement with the wrong category device can cause a very serious accident.

The clamp meter follows the same categories as the multimeter, so before taking a measurement or buying a clamp meter, look at the category it serves.