Definition of voltmeter

It is a different device from the device that measures electric current, which is  the ammeter  , which relies primarily on measuring potential difference, and in the process of measuring it, it is based on the internationally recognized unit for measuring the intensity of electricity, which is the ampere, as the official unit of measuring current intensity, and as the unit of measuring electric current in the system. International.

While the second is based on measuring electric current, which helps us know how the intensity of electric current is calculated, and the work of the voltmeter is based on torque, as it is created through current that works through measurement and voltage, and after the torque occurs, a deviation in the indicator occurs.

Accordingly, the specialists have confirmed, according to the laws of measuring voltage in voltmeter devices, that there is a direct relationship between the indicator and the voltage difference. This device also works through a system of balance and not series, which is connected to the electrical circuit. There is a symbolic representation of the voltmeter device represented by the letter V and E. It refers to the symbol used within the circuit. It should also be noted that the voltmeter is not only different from the ammeter, but it is also different from another device with a similar name called “voltamite.”

The importance of connecting a voltmeter in parallel

According to the laws of electric current intensity, there are multiple systems of conduction within devices that help in measuring electrical currents, and one of these methods is the parallel method, which requires connecting a voltmeter, as this method ensures that the internal resistance is maintained to be constantly high, in addition to Therefore, the method that is based on connecting in parallel when connected in series reduces the flowing current, and connecting a voltmeter in parallel causes a decrease in the voltage level, as it decreases as a result of the combination of the high resistance of the device with the connected element. However, these steps in the connection process do not cause any obstacles or difficulties in the voltmeter, and therefore this device is an accurate measurement, without any false readings.

High resistance in a voltmeter

Technicians specializing in electrical engineering and electronics confirm that the voltmeter is built internally based on the presence of high resistance, because it is a device entrusted with measuring voltage differences between two terminals in the circuit, and the voltmeter does not change the current of the measuring device. It should also be noted that the voltmeter If it has a low resistance, the electric current will pass through it, and thus a malfunction will occur in the process of measuring the voltage, and thus the indicator will give false measurements.

MI instrument in voltmeters

This tool is considered an important tool in the voltmeter, which is used to measure both voltages in different currents, which are alternating current and direct current. In this type of tool, the degree of deviation in it is linked to the variable voltage of the coil, so that the greater the voltage of the coil, the greater the voltage. The level of deviation. This tool is based on two main types, the first type is attraction, and the second type is repulsion. There are two sides, one of which is a moving tool, and the other side is an iron instrument, where these two types are connected to carry out the moving process.

Voltmeter rate tool

This type of tool is used in voltmeters in alternating current circuits to measure voltage. The rectifier tool controls the alternating current and then converts it to the amount of direct current. This process is only done through the rectifier. The direct current signal is also measured. Through PMMC tool.

Types of voltmeters

Voltmeters are classified according to the most important elements, the most important of which is the construction element and the internal structure in voltmeter devices, as it has a number of types represented by the PMMC voltmeter, as this type is based on a type of conductor called a carrier conductor, as it is placed in magnetic fields, and then appears The force that affects this conductor, in which the device pointer is deflected, and this type of voltmeter measures direct current, as it has a number of basic qualities that distinguish it from other types, such as high accuracy and low consumption, but despite the advantages In terms of accuracy and others, this type of device is characterized by its high cost. It is worth noting that this type of voltmeter is internally connected in a series system, not a parallel system, and the types of voltmeter devices are as follows:

Electric voltmeter

It is one of the types of voltmeters that are used to measure voltage. The mechanism of this type of voltmeter works to measure each alternating current circuit, and to measure the direct current circuit. In this type of device, the matching and measurement process is the same in both types of current. Alternating current and direct current.

Analog voltmeter

The analog voltmeter, or as it is called the analog voltmeter, is used to measure the alternating current voltage. This device displays the reading through the indicator, which is a fixed indicator that is based on the calibration scale. The deviation of the indicator in this device depends on the torque. It should also be noted that The magnitude of the torque, as well as the measurement effort, have a unique fundamental relationship between them, where the magnitude of the torque developed is directly proportional to the measurement effort. The greater the torque, the greater the measurement effort, and the less the torque, the less the measurement effort.

Digital voltmeter

The digital voltmeter is known as a voltmeter device that displays the reading, in digital form, as this device determines the indicator accurately, and then gives a very accurate reading. The tool that measures direct current in this device is also known as a “direct voltmeter”, and a meter is used. AC voltage, in an AC circuit to measure voltage.