FIELD: information-measurement and computer equipment.
SUBSTANCE: frequency meter for industrial electric networks consists of input terminal, analog comparator, first - fifth univibrators, generator of rectangular pulses, counter, first - fourth registers, indicator, timer, first and second adders, first and second divider units, multiplier unit, correction unit, unit of setting period number, number comparator, source of reference voltage and low pass filter, which are properly connected between each other into single electric circuit.
EFFECT: simplifies the device circuit, increases its fast-action and precision.
1 dwg
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