Validating Uncertainty Analyses for Gas Flow Standards via Intra- and Inter-Laboratory Comparisons

Published

July 1, 1999

Author(s)

John D. Wright, D B. Ward, G E. Mattingly

Abstract

The Fluid Flow Group (FFG) at NIST maintains flow standards to perform calibrations of gas flowmeters over the 3.7 x 10^-2 L/min to 78,000 L/min flow range. Uncertainty analyses based on the propagation of uncertainties method show that the uncertainties of the provers range from 0.16 % to 0.19 %. The results of inter-laboratory comparisons and intra-laboratory comparisons (I.e., crossover tests between two different provers within the NIST laboratory) are examined to verify the uncertainty analysis results. The concepts of short- and long-term crossover tests and expected agreement are discussed. The comparison test results supports the uncertainty specifications for the FFG gas flow standards.

Proceedings Title

1999 National Conference of Standards Laboratories Workshop & Symposium. Session 7E

Conference Dates

July 11-15, 1999

Conference Title

Proceedings of the 1999 NCSL Workshop & Symposium

Pub Type

Conferences

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Keywords

comparisons, crossover test, expected agreement, gas flow, inter-laboratory, intra-laboratory, uncertainty

Citation

Wright, J. , Ward, D. and Mattingly, G. (1999), Validating Uncertainty Analyses for Gas Flow Standards via Intra- and Inter-Laboratory Comparisons, 1999 National Conference of Standards Laboratories Workshop & Symposium. Session 7E, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=830621 (Accessed October 17, 2025)