Wright, J.
, Johnson, A.
, Moldover, M.
and Nakao, S.
(2022),
Gas Flow Standards and Their Uncertainty, Metrologia, [online], https://doi.org/10.1088/1681-7575/ac8c99, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=934452
(Accessed December 10, 2024)
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Gas Flow Standards and Their Uncertainty
Published
Author(s)
, , , Shin-ichi Nakao
Abstract
We review diverse types of gas flow standards that are used to calibrate other gas flow meters. For each type of standard, we describe the principles of its operation and at least one hardware example. We identify the practical limits of the example's performance, and, in many instances, we provide an uncertainty budget for a typical flow. The reviewed standards span the flow range 2.2 × 10-7 g/s to 520 kg/s. The references point to standards that operate at higher and at lower flows. The reviewed standards include volumetric flow standards (piston and bell provers, pressure-volume-temperature-time standards, rate-of-rise standards), static and dynamic gravimetric flow standards, and velocity × area standards such as critical flow venturis, laser doppler anemometer surveys, and multipath-ultrasonic meters.Citation
Metrologia
Volume
60
Pub Type
Journals
Download Paper
Keywords
gas flow, primary standard, working standard, gravimetric, piston prover
Citation
Issues
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Created December 12, 2022, Updated June 23, 2023