Uncertainty Budgets for Realization of ITS-90 by Radiation Thermometry

Published

January 1, 2003

Author(s)

J Fischer, M Battuello, M Sadli, M Ballico, S N. Park, P Saunders, Y Zundong, B. Carol Johnson, E Van der Ham, F Sakuma, Graham Machin, N Fox, W Li, S Ugur, M Matveyev

Abstract

Recent international comparisons [1,2] and key comparisons have shown that the realization of the ITS-90 above the freezing point of silver and its dissemination may be less straightforward than expected. In many cases, the deviations of the local scale realizations resulted in higher values than the combined estimated uncertainties could reasonably justify. On the other hand, it must be considered that the realization of the ITS-90 by radiation thermometry is a complex exercise involving a large number of operations with many influencing parameters. Furthermore, the key comparisons need a unified approach to the treatment of uncertainties. Consequently, a rigorous standard approach for the calculation of uncertainties is necessary. In this paper three different operational schemes have been identified for realizing the ITS-90 by radiation thermometry. For all three schemes an analysis is presented fo the base-line parameters underlying the scale realization above the freezing point of silver with respect to their contribution to the uncertainty budget. The paper is a joint effort of the CCT working group on radiation thermometry summarizing the knowledge and experience of all experts in this field.

Proceedings Title

Temperature: Its Measurement and Control in Science and Industry | | | AIP

Volume

7

Conference Dates

October 21-25, 2002

Conference Location

Undefined

Conference Title

AIP Conference Proceedings

Pub Type

Conferences

Keywords

international temperature scale of 1990, temperature, uncertainty

Citation

Fischer, J. , Battuello, M. , Sadli, M. , Ballico, M. , Park, S. , Saunders, P. , Zundong, Y. , Johnson, B. , Van der Ham, E. , Sakuma, F. , Machin, G. , Fox, N. , Li, W. , Ugur, S. and Matveyev, M. (2003), Uncertainty Budgets for Realization of ITS-90 by Radiation Thermometry, Temperature: Its Measurement and Control in Science and Industry | | | AIP, Undefined (Accessed April 26, 2024)