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Title: Using Common Ultrasonic Meter Diagnostics to Estimate Changes
Author: Richard Rans
Source: 2019 Canadian School of Hydrocarbon Measurement
Year Published: 2019
Abstract: Ultrasonic meter chord locations, path types, path angles, meter body inlet bevel angles and nonaxial flow cancelation designs are manufacturer-specific. Manufacturers have adopted similardiagnostic 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 a traceability chain between meter calibration, commissioning and operation using velocity diagnostics that are common to all ultrasonic meters with three or more chord velocity measurements. The diagnostics are based on Gaussian quadrature geometric characteristics and chord average velocities at fixed chord locations.

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