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Internal Measurement Assurance for the NIST Realization of the ITS-90 from 83.8 K to 1234.93 K

Published

Author(s)

Gregory F. Strouse

Abstract

The National Institute of Standards and Technology (NIST) is responsible for realizing, maintaining, and disseminating the International Temperature Scale of 1990 (ITS-90) to the United States of America. The ITS-90 fixed-point cells necessary to calibrate standard platinum resistance thermometers (SPRTs) require an extensive internal measurement assurance program to insure that the assigned fixed-point cell uncertainties are achieved. There are six interactive elements for the realization of an ITS-90 fixed-point cell that contribute to the uncertainty of an SPRT calibration. These six elements are the fixed-point cells, maintenance systems, SPRT, measurement system, realization techniques, and data analysis. Within these six elements, there are twenty-nine parameters that are used to quantify and maintain the NIST-assigned fixed-point cell and SPRT calibration uncertainties.
Proceedings Title
Eighth International Temperature Symposium | 8th | Temperature: Its Measurement and Control in Science and Industry; Volume Seven | AIP
Volume
684
Issue
Pt. 1
Conference Dates
October 21-24, 2002
Conference Title
AIP Conference Proceedings

Keywords

Fixed-Point Cell, Freezing-Point Cell, ITS-90, Measurement Assurance, Melting-Point Cell, SPRT, Statistical Process Control, Thermometer Calibration, Triple-Point Cell

Citation

Strouse, G. (2003), Internal Measurement Assurance for the NIST Realization of the ITS-90 from 83.8 K to 1234.93 K, Eighth International Temperature Symposium | 8th | Temperature: Its Measurement and Control in Science and Industry; Volume Seven | AIP, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=830792 (Accessed June 16, 2024)

Issues

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

Created October 1, 2003, Updated February 17, 2017