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Title: Uncertainty Analysis Of Nists 20 Liter Hydrocarbon Liquid Flow Standard
Author: Aaron N. Johnson Chris J. Crowley Tt Yeh
Source: Flomeko 2010
Year Published: 2010
Abstract: The National Institute of Standards and Technology (NIST) uses a bi-directional 20 L-displacement piston prover as its primary standard for measuring hydrocarbon liquid flows ranging from 1.86 10-5 m3/s (0.3 gpm) to 2.6 10-3 m3/s (40 gpm). Our analysis that shows that the provers uncertainty over this flow range is 0.074 % (k 2, corresponding to a 95 % confidence interval). Using a dual rotor turbine meter as the transfer standard, we compare the new 20 L piston prover standard with NISTs other hydrocarbon liquid standards and NISTs water flow standard. The results are consistent with the presented uncertainty analysis

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