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Title: Background And Practical Application Of The Prci Multi Run Uncertainty Calculator
Author: Rick Rans
Source: American Gas Association 2009
Year Published: 2009
Abstract: The output results of uncertainty tools are dependant on the design basis of the tool and the error estimates it requires. During the literature search and multi-run uncertainty derivation phase of the tool development, word association became a major challenge. Random, systematic, quadrature, root mean square, correlated, uncorrelated, maximum permissible error, maximum probable error, bias, bias correction factor, etc. would pop up in the discussion. Each team member had their favorite way of describing uncertainty (error estimates) and a simple way of dealing with them. Using the GUM1, which is an international ISO/ANSI standard for the calculation of uncertainty, the team had to work through the terminology and tool requirements. After a discussion of key issues and assumptions, the PRCI Multi Run Uncertainty Calculator will be used to calculate the four uncertainty estimates: a three run orifice meter station and a three run turbine meter station, both with and with-out a gas chromatograph.

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