Measurements of Electrical Parameters

There are many types of measuring tools available to measure voltage, current, power and energy. Some of the measuring tools are:

• Multimeter 
• Clamp meter 

Multimeter 

A Multimeter can be used for measuring voltage, current and resistance. It can also be used for fault detection in small circuit or to find out the broken wires in a circuit. It can be of two types:

• Analog Multimeter 
• Digital Multimeter 

The following figure shows the difference types of multimeter :

Analog Multimeter 

It consists of a needle which points at the scale built on it for giving the measured value. 

Digital Multimeter 

    It is an electronic meter which displays the measured value in a digital from. 

Usually, a standard Multimeter can measure the following electrical quantities :

• DC Voltage 
• DC Current 
• AC Voltage 
• AC Current
• Resistance 

Clamp Meter 

An electrical tester which combines a Multimeter with a current se nsor is known as a clamp meter. The probes in the device measure voltage, whereas the current. The clamp are the hinged jaws joined to an electric meter that allows users to clamp around the cable/wire using a clamp meter, the wire/cable to be measured is not disconnected. The following images shows type of clamp meter :

Usually, a standard clamp meter can measure the follo wing electrical quantities :

• AC current 
• Temperature 
• AC voltage 
• Capacitance 
• DC voltage 
• Resistance 
• DC current 
• Frequency