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Title: Performance Characteristics Of Transit Time Ultrasonic Flow Meters
Author: W. R. Freund, Jr., K. L. Warner
Source: 1995 Gulf Coast Measurement Short Course (Now called ASGMT)
Year Published: 1995
Abstract: Transit time ultrasonic flowmeters are increasingly being used in the measurement of natural gas flows. Multipath ultrasonic flowmeters are sufficiently accurate for custody transfer metering. The operating characteristics of these meters are explored by means of a model whose performance is linear with average velocity. Calibration of multipath ultrasonic flowmeters using chordal integration techniques can be accomplished with measurements of the geometry of the meter and delay times for the transducers. The effect of measurement errors in geometry and time on the performance curve of the meter are studied. Test results are given for 300 mm and 150 mm ultrasonic flowmeters.

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