Frequency Meter Working Principle
Tags: Frequency meter
Some frequency meters use a micro-ammeter movement and an L-C filter so the micro-amp flow changes with frequency and the needle deflects accordingly. Digital frequency meters often count the rising edge of each sine wave in a given time period (milliseconds) and calculate the frequency accordingly. Some frequency meters contain vibrating "reeds" (thin steel fingers) where each reed is tuned to a specific frequency and vibrates when the power system (usually a generator) is operating at that specific frequency. These particular meters are very precise, but are typically only designed to work in a range of normal line frequency +/- about 5Hz.
Most frequency meters are designed to operate at voltages in the range of 110V, so they are normally connected to the power system through a voltage transformer.
Most frequency meters are designed to operate at voltages in the range of 110V, so they are normally connected to the power system through a voltage transformer.
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