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Title: Common Velocity Diagnostics for Ultrasonic Meters with Three or More Chords
Author: Rick Rans Warren Peterson
Source: 2018 Canadian School of Hydrocarbon Measurement
Year Published: 2018
Abstract: Ultrasonic meter chord locations, path types, path angles, meter body inlet bevel angles and non-axial flow cancelation designs are manufacturer-specific. Manufacturers have adopted similar-diagnostic terminology such as profile factor, asymmetry and cross flow, that requires meter specific interpretations. These common terms can have very different meanings when trying to compare diagnostics from one meter manufacturer to another. This paper describes how to create velocity diagnostics that are common to all ultrasonic meters with three or more chord velocity measurements. The technique is based on Gaussian quadrature geometric characteristics and measuring or calculating chord average velocities at fixed chord locations.




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