Circuit Introduction

Every Electronic circuit usually contains Resistors,Capacitors,IC,Diodes, Thermistors etc as thier constituent elements. Suppose we write maths examination, if we copy the question wrong then it is obvious that we get the wrong answer. In the same way if any constituent unit of the circuit is not working properly then it effects the whole result that we are trying to obtain.

So as we have already seen the importance of individual testing of each unit in a circuit. Let us see the individual testing of the important portion(Resistors&Capacitors) of the circuit using Multimeter. A multimeter can be a hand-held device used for basic fault finding and field service work, or a bench instrument which can measure to a very high degree of accuracy. They can be used to troubleshoot electrical problems in a wide array of industrial and household devices such as electronic equipments, motor controls, domestic appliances, power supplies, and wiring systems.

What is a multimeter..?
A multimeter or a multitester, also known as a VOM (Volt-Ohm meter), is an electronic 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.

Multimeters can be classified into two types.

• Digital Multimeter
• Analog Multimeter

Digital Multimeter:
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. It has an LCD or a LED display.

Analog Multimeter:
Analog multimeters use a microammeter whose pointer moves over a scale calibrated for all the different measurements that can be made. Analog multimeters have a needle.

NOTE:
Digital multimeters are now far more common than analog ones, but analog multimeters are still preferable in some cases, for example when monitoring a rapidly-varying value.

Each Multimeter(Analog or digital)consists of mainly 5 parts. They are

1. Ohmic range
2. AC Voltage range
3. DC Voltage range
4. AC Mili-ampere range
5. DC Mili-ampere range

Ohmic range is the part of the multimeter which is used to check the correctness of the Resistor and Capacitor.

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