Berg, R.
and Cignolo, G.
(2003),
NIST-IMGC Comparison of Gas Flows Below 1 Liter per Minute, Metrologia, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=830791
(Accessed April 25, 2024)
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NIST-IMGC Comparison of Gas Flows Below 1 Liter per Minute
Published
Author(s)
, G Cignolo
Abstract
We compared the IMGC and NIST standards for small gas flows at the IMGC. The IMGC standard is a recently developed primary flow meter that extracts a large piston out of a temperature-controlled chamber. Controlling the piston's speed holds the pressure in the chamber constant. The NIST standard is a recently developed transfer standard that was calibrated against two primary standards at NIST. The first NIST primary extracts a large piston out of an oil-filled chamber in which a metal bellows is suspended. Controlling the piston's speed holds the pressure in the bellows constant. The second NIST primary is a static gravimetry method. The results include 49 nitrogen flow rates from 0.22 to 660 micromol/s = 1.3443 cm^3/min of an ideal gas at the standard conditions of 0 C and 101325 Pa.) For all but one of the comparisons, the agreement between IMGC and NIST is better than 0.06%.Citation
Metrologia
Volume
40
Pub Type
Journals
Download Paper
Keywords
comparison, gas flow, transfer standard
Citation
Created June 13, 2003, Updated February 17, 2017