Microflowmeter utilizes a small nutating element to displace a fixed
volume of liquid in each cycle. [Please refer to Figure 1 and Principle
of Operation on Page 2 for a description of this cycle]. The motion
of the nutator [nutating element] is detected via a magnetic coupling
between a small magnet, integral with the nutator, and a ferromagnetic
"pickup" wire located within the electronics housing. The motion of
the nutator/wire is sensed electronically. Each complete or partial
nutator cycle results in a corresponding complete or partial sine wave.
This "raw" signal is conditioned to produce 5 volt pulses through an
open collector [NPN transistor] with an integral 200 ohm output resistor.
[Please refer to Figure 3 on Page 4 for a functional block diagram of
the Microflowmeter electronics.] The exact displacement of each meter
is determined empirically prior to shipment and supplied with the meter.
This "calibration factor" is used to scale the pulses in display meters
or computers to determine the volume and rate of liquid passing through