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IOM Single Case BiRotor Plus R06
Introduction
6.1 General
The Single Case BiRotor Plus is an extremely
accurate single cased fl ow measuring
devicedesigned primarily for, but not limited to,
ethanol blending. It produces a high resolution
signal which is directly proportional to the rate of
liquid fl ow through the meter utilizing non-wetted
pick-offs. These signals can be shaped by a simple
internal pre-amplifi er for transmission to ancillary
equipment.
The BiRotor Plus Meter utilizes the exclusive BiRotor
principle. There are no sliding, oscillating, or
reciprocating parts.
Principle of Operation
The operation of the meter is embodied in
the function of the measuring rotors; they are
always dynamically balanced but hydraulically
unbalanced during operation. The rotors have
no metal to metal contact with each other or with
the housing with in which they rotate. Clearances
between moving components are maintained with
timing gears.
The BiRotor Plus is a positive displacement (PD)
meter. A PD meter uses a mechanical principle
that measures fl ow by continuously dividing the
fl owing stream into known volumetric segments,
isolating those segments momentarily, and then
returning them to the fl owing stream while counting
the number of displacements. This is a direct
volume measurement, there is no inferred
or software generated measurement.
