Rectifier Type Instruments
type instruments are used for measurement of ac. voltages and currents by
employing a rectifier element which converts a.c. to a unidirectional d.c.
and then using a meter responsive to d.c. to indicate the value of rectified
indicating instrument is PM MC instrument which uses a d ’Arsonval movement.
method is very attractive since PM MC instruments have a higher sensitivity
than the electrodynamometer or the moving iron instruments. The arrangement
which employs a full wave.