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Transducer: The sensor that sends and receives ultrasonic signals.
Ultrasonic: Of or relating to acoustic frequencies above the range audible to the
human ear.
Usec: This is one of the available flow display units, used for laboratory testing
only.
Zero flow cutoff: A feature of the Accutron that forces the instrument to “set to zero” any
flow readings that are less than this amount.
Equations
Calibration correction: Correction = Reading you want / Reading you are receiving.
Error percentage:
In the case of perfect symmetry in the airflow distribution between the two sensors, the accuracy of the
Accutron IS is dependent on how accurately the transit times can be measured.
The accuracy of the instrument is 2% of full-scale or the instrument reading ± 0.05M/S; whatever is
greater.
Example: If full scale is 100 KCFM, the error is 2% X 100 KCFM = 2 KCFM.
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