Principle Of Operation
Mechanical Installation &
Installation & Operating Considerations
and Maintenance Instructions
MICRO FLOW METER-PRINCIPLE OF OPERATION
cycle, an amount of liquid is displaced equal to the difference in the
volumes of the chambers minus the volumes of the pistons.
This process repeats itself in a continuous flow mode at the rates of
1 to 210 complete cycles per second proportionately to the fluid flow
through the meter. In the FMTD4 Microflowmeter, each cycle displaces
approximately .02 cc. Approximately 200,000 cycles will displace one
gallon. The FMTD20 Microflowmeter has a flow rate capacity five times
larger than the FMTD4.
Signal detection is accomplished by light interruptions of a photo emitter/detector
device. A ferromagnetic wire tracks the magnet in the nutator [through
a pressure tight barrier] causing these interruptions. The interruptions
are electronically manifested as sine waves which are then conditioned
by conventional electronic means to provide a square wave output.