ASME MFC-5.3

Abstract

This Standard applies only to ultrasonic flowmeters that base their operation on the reflection of acoustic waves, frequently referred to as a Doppler flowmeter. The flow measurement utilizes either frequency or time domain techniques. This Standard concerns the volume flow-rate measurement of a liquid dominant fluid with steady flow or flow varying only slowly with time in a completely filled closed conduit. <br><strong>Purpose</strong> <br>This Standard provides a <br>(a) description of the operating principles employed by the ultrasonic flowmeters covered in this Standard <br>(b) guideline to expected performance characteristics of ultrasonic flowmeters covered in this Standard <br>(c) description of calibration and diagnostic procedures <br>(d) description of potential uncertainty sources and their reduction <br>(e) common set of terminology, symbols, definitions, and specifications