PRIME 4 Installation and Operation Manual
Overview 2
In the example below, a quarter revolution has been made. Blade A is still extended and blade B is now
fully extended. An exact known volume of new liquid is now in the measuring chamber.
One-eighth of a revolution later, the measured liquid moves out of the meter. Blade A retracts on the outlet
side and starts to extend on the inlet side to form another measuring chamber. A second measuring
chamber forms between blades B and A as the rotor rotates around the cam.
In one-half revolution, two measuring chambers have formed and the third is forming. This cycle is
repeated as long as liquid flows.
The rotation of the rotor is converted into electronic pulses by means of an exciter gear—an integral part of
the rotor—and a pulse pick-up located in a well on the side of the meter cover. The meter produces
approximately 50 pulses per gallon (13 pulses per liter).
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