Weston (M.I) Type Frequency Meter
Principle: It is a moving iron instrument which operates
on the principle of variation of impedance in an inductive circuit with
variation of frequency.
Weston Frequency Meter
Construction: It consists
of two coils A and B mounted perpendicular to each other. Each coil is divided
into two sections. The connections are as shown in the above fig. The branch of
coil has a resistance R1 connected in the series with it while coil
B