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

Published

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

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 July 21, 2024)

Issues

If you have any questions about this publication or are having problems accessing it, please contact reflib@nist.gov.

Created July 1, 1999, Updated February 17, 2017