BASIC ELECTRICAL MEASURING DEVICES

Ammeter

•AMMETER IS USED TO MEASURE THE AMOUNT 

OF CURRENT FLOWING THROUGH THE CIRCUIT .

•IT IS ALWAYS CONNECTED IN SERIES.

•IT IS A LOW RESISTANCE DEVICE

VOLTMETER
•IT IS USED TO MEASURE THE POTENTIAL 

DIFFERNCE BETWEEN TWO POINTS IN AN 

ELECTRIC CIRCUIT

•IT IS CONNECTED IN PARALLEL

•IT IS A HIGH RESISTANCE DEVICE.

WATTMETER

•IT IS A DEVICE USED TO MEASURE POWER IN 

ANY ELECTRIC CIRCUIT

•IT HAS TWO COILS NAMELY

  1.CURRENT COIL

  2.PRESSURE COIL

MEGGER

•IT IS AN ELECTRICAL DEVICE WIDELY USED TO 

MEASURE

 1.CONTINUITY BETWEEN TWO POINTS

 2.INSULATION RESISTANCE

 3.CONTINUITY WITH RESPECT TO EARTH

MULTIMETER

•MULTIMETER IS THE DEVICE WHICH COMES AS ALL 

IN 

ONE PACKAGE FOR MANY METERS IN ONE SET

•IT CAN MEASURE 

VOLTAGE,CURRENT,RESISTANCE,INDUCTANCE,CONTI

NUITY,CAN BE USED TO TEST A DIODE,

•IT IS OF TWO TYPES BASICALLY

   1.ANALOG MULTIMETER

   2.DIGITAL MULTIMETER