Principle of Operation
The EASZ-11 is an Ultrasonic Open Channel Flowmeter capable
of measuring flow rates in all types of Open Channel Flow
applications up to a range of 10 m. The Transmitter has
standard outputs of 4-20 mA and 2 relays, which can be configured
as a High, Low or Totaliser output. A EESIFLO 10 transducer
is normally used in conjunction with the EASZ-11.
The transducer is mounted perpendicularly above the flow
that is to be measured. The microprocessor in the Transmitter
fires an electronic pulse, which the Transducer converts
to an acoustic pulse. This pulse travels towards the and
is reflected back from the flow. The Transducer then converts
this energy back into a signal and stops a countely in the
microprocessor which then, knowing the speed of sound through
air, can accuratey determine the distance and furthermore
the flow from the flume or weir settings which must be programmed
into the Transmitter by the user. The powerful software
removes false echoes and the electronic filter removes ambient
noises.
