Electrical Resonance Type Frequency Meter

The operation of a resonant type frequency meter is based on the comparison of the frequency being measured with the frequency of natural oscillations in an electrical circuit or a microwave resonator that is tuned to resonance with the frequency being measured.

Electrical resonance type frequency meter.

The instrument consists of a number of metal reeds with slightly different natural frequencies fitted side by side. Many are instruments of the deflection type ordinarily used for measuring low frequencies but capable of being used for frequencies as high as 900 hz these operate by balancing two opposing forces. As the name suggests its action depends upon the electrical resonance. Great sensitivity ii electrodynamometer type of frequency meter.

Conceptually the principal of this frequency meter is quite simple. When inductive reactance xl and capacitive reactance xc become equal electrical resonance is said to have occurred. Weston type frequency meter https youtu be e8jj1jks7we. Many are instruments of the deflection type ordinarily used for measuring low frequencies but capable of being used for frequencies as high as 900 hz.

The vibrating reed frequency meter is a very simple instrument and has got an advantage of giving reading free from errors due to change in temperature waveform and magnitude of applied voltage. Frequency meter device for measuring the repetitions per unit of time customarily a second of a complete electromagnetic waveform various types of frequency meters are used. Construction of weston frequency is as compared. In this article we will study about ferrodynamic type frequency meter.

There is a laminated iron core of varying cross section. It mainly consists of a fixed coil and a moving coil. Fixed coil fixed coil is divided into two parts 1 and 2 which forms two separates resonant circuits fixed coil 1 is in series with an inductance l1 and a capacitance c1 forming a resonant circuit of frequency f1. Mechanical resonance type frequency meter is principally an electro mechanical device.

The electrical resonance type frequency meter is an indicating type instrument. Construction of electrical resonance type frequency meter. The vibrating reed type frequency meters or mechanical resonance type frequency meter indicate the supply frequency of the circuit directly and are very much convenient for most practical purposes. Changes in the frequency to be measured cause a change.

Also we call this instrument the vibrating reed type frequency meter. This instrument operates on the principle of electrical resonance i e. The main principle of working of weston type frequency meter is that when an current flows through the two coils which are perpendicular to each other due to these currents some magnetic fields will produce and thus the magnetic needle will deflects towards the stronger magnetic field showing the measurement of frequency on the meter. A frequency meter is an instrument that displays the frequency of a periodic electrical signal.