User`s manual

Features and Capabilities 1-3
December 2003
System Description
The TransPort is one part of the flowmeter system. The
flowmeter system consists of two essential subsystems: the
flowcell and the electronics package (the TransPort).
The Flowcell
The flowcell is that part of the system that uses ultrasonic pulses
to interrogate the flow. It consists of the flowcell pipe and the
transducers.
A. FLOWCELL PIPING - The flowcell can either be created in
the existing piping (for example, by inserting wetted
transducers into the pipe, or clamping non-wetted transducers
onto the pipe), or inserted as a substitute pipe section
(spoolpiece). The flowcell must provide mechanical support
for the transducers and assure stable fluid conditions for
accurate flow measurement.
B. TRANSDUCERS - The transducers convert electrical energy
into ultrasonic pulses when in a transmit cycle, and convert
the ultrasonic pulses back to electrical energy when in a
receive cycle. In other words, they act like loudspeakers when
transmitting the signal and microphones when receiving it. In
the TransPort system, each transducer acts as a receiver and
transmitter since a series of ultrasonic pulses are alternately
sent upstream and then downstream through the flowcell.