ASME MFC-5.1

Abstract

This Standard applies to ultrasonic flowmeters that base their operation on the measurement of transit time of acoustic signals. This Standard concerns the volume flow-rate measurement of a single-phase liquid with steady flow or flow varying only slowly with time in a completely filled closed conduit. <br><strong>Purpose</strong> <br>This Standard provides <br><em>(a)</em> a description of the operating principles employed by the transit-time ultrasonic flowmeters <br><em>(b)</em> a guideline to expected performance characteristics of transit-time ultrasonic flowmeters <br><em>(c)</em> a description of calibration, verification, and diagnostic procedures <br><em>(d)</em> a description of potential uncertainty sources and their reduction <br><em>(e)</em> a common set of terminology, symbols, definitions, and specifications