Harvey, A.
(2023),
Small Corrections to 1989 NIST Constant-Volume Gas Thermometry Data, Metrologia, [online], https://doi.org/10.1088/1681-7575/ad0a35, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=956523
(Accessed November 21, 2024)
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Small Corrections to 1989 NIST Constant-Volume Gas Thermometry Data
Published
Author(s)
Abstract
Constant-volume gas thermometry data published in 1989 for the difference between the thermodynamic temperature and the International Practical Temperature Scale of 1968 are corrected in two ways. A refined estimate of the thermal expansivity of the material of the gas bulb, published in 1990, increases the thermodynamic temperature by amounts on the order of 1-3 mK. Better knowledge of the nonideality of helium gas decreases the thermodynamic temperature by amounts on the order of 0.1-0.5 mK. The net effect is a small increase in the thermodynamic temperature derived from the 1989 experiments. The magnitude of this increase is approximately 2 mK at 505 K, increasing to 3 mK at temperatures near 700 K, and then diminishing to near 0.5 mK at the highest temperature of the measurements (933 K). These corrections are smaller than the uncertainty of the experiments, but may be of significance for future recommendations for the relationship between the thermodynamic temperature and the consensus scale in this temperature range.Citation
Metrologia
Volume
60
Issue
6
Pub Type
Journals
Download Paper
Keywords
gas thermometry, helium, thermodynamic temperature
Citation
Issues
If you have any questions about this publication or are having problems accessing it, please contact reflib@nist.gov.
Created November 17, 2023