The instruments, which is use to measure any quantity are known as measuring instruments. This tutorial covers mainly the electronic instruments, which are useful for measuring either electrical quantities or parameters.
Following are the most commonly use electrical instruments.
- Volt meter
- Am meter
- Ohm meter
- Multi meter
Now, let us discuss about these instruments briefly.
As the name suggests, voltmeter is a measuring instrument which measures the voltage across any two points of an electric circuit. There are two types of voltmeters: DC voltmeter, and AC voltmeter.
DC voltmeter measures the DC voltage across any two points of an electric circuit, whereas AC voltmeter measures the AC voltage across any two points of an electric circuit.
As the name suggests, ammeter is a measuring instrument which measures the current flowing through any two points of an electric circuit. There are two types of ammeters: DC ammeter, and AC ammeter.
DC ammeter measures the DC current that flows through any two points of an electric circuit. Whereas, AC ammeter measures the AC current that flows through any two points of an electric circuit.
Ohm meter works on the basis of Ohm’s law.it is use to measure the value of resistance between any two points of an electrical circuit. Moreover, It also be use for find the value of an unknown resistor. There are two types of ohmmeters: series ohmmeter, and shunt ohm meter.
In series type ohmmeter, the resistor whose value is unknown and to be measure should be connect in series with the ohmmeter. It is useful for measuring high values of resistances.
Multi meter is an electronic device which is use to measure the electrical quantity such as voltage, current & resistance one at a time. It is use to measure DC & AC voltages. DC & AC currents and resistance of several ranges.