4.2.1　Experimental purposes

(1)Understand the principles of current measurement with magnetoelectric gauge head.

(2)Comprehend and acquire the principles and methods of refitting the gauge head to the ammeter,voltmeter or ohmmeter.(https://www.daowen.com)

(3)Learn about the principles and methods of calibrating the refitted meters.

(4)Learn about the rating method of electric meters.