PRINCIPLE OF OPERATION
1: Principle Of Operation
that a volume of fluid is captured in the left chamber in position 1 and
the right chamber in position 3. These volumes are displaced in each full
cycle by the forces described below:
1 shows the nutator in its farthest right travel point within the
chambers. The beam has been angled to the point shown because it is
constrained to move with the nutator. The nutator has most of its upper
surface same time, the left piston, being part of the same unit, is
forced upward and in a counter - clockwise direction. The result of
this action is shown in position 2.
2 shows the right side of the right piston and the upper right side
of the left piston exposed to the higher up stream pressure while their
opposite sides are exposed to the lower down stream pressure. The resultant
forces cause the right piston to move to the left and in a clockwise
direction. At the same time, the left piston, being part of the same
unit, is forced to the left and in a counter - clockwise direction.
The result of this action is shown in position 3.
3 and 4 depict the positions and forces on the nutator and beam
in exactly the opposite directions of those in positions 1 and 2.
repeats itself in a continuous flow mode at the rates of 1 to 230 complete
cycles per second proportionately to the fluid flow through the meter.
In the FMTD4 Flowmeter, each cycle displaces approximately .02 cc. Approximately
200,000 cycles will displace one gallon. The FMTD20 displaces approximately
.1 cc per cycle.