Hostname: page-component-cd9895bd7-p9bg8 Total loading time: 0 Render date: 2024-12-28T20:20:02.610Z Has data issue: false hasContentIssue false
  • English
  • Français

Uncertainty evaluation in the calibration of Pt/Pd thermocouples up to copper freezing point at NIS-Egypt

Published online by Cambridge University Press:  29 June 2011

F.M. Megahed  and
Y.A. Abdelaziz
Get access

Abstract

The dissemination of traceability to the International Temperature Scale of 1990 (ITS-90) through comparison calibration of thermocouples, is playing an important role in metrology institutes, secondary laboratories and industrial measurements. The previous studies of the Pt/Pd thermocouples at NIS-Egypt, shows promise of achieving significant improvements uncertainty of temperature measurements up to 960 °C. In this paper we describe the uncertainty assessment on the measurements of the calibration of Pt/Pd thermocouples at fixed point cells up to the freezing point of copper and by the comparison technique following a defined heat treatment at 1100 °C. All the measurements on Pt/Pd thermocouples were carried out using NIS facilities.

Keywords

Copper freezing pointPt/Pd thermocouplesincertainty
Type
Research Article
Information
International Journal of Metrology and Quality Engineering , Volume 2 , Issue 1 , 2011 , pp. 13 - 17
Copyright
© EDP Sciences 2011

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Abdelaziz, Y.A., Megahed, F.M., Halawa, M.M., Stability and calibration of platinum/palladium thermocouples following heat treatment, Measurement Journal IMEKO-UK 35, 413–420 (2004) CrossRefGoogle Scholar
E.H. McLaren, E.G. Murdock, H.H. Plumb, New Considerations on the Preparation, Properties, and Limitations of the Standard Thermocouple for Thermometry, in Temperature: its Measurement and Control in Science and Industry (1972) Vol. 4, pp. 1543–1560
E.H. McLaren, E.G. Murdock, The Pt/Au Thermocouple, NRC Report NRCC/27703 Monograph (Canada Publ., 1987), pp. 15–30
A.Y. Abdelaziz, F.M. Megahed, M.M. Halawa, M.M. Ammar, Performance, Thermoelectric Homogeneity and Stability of Au/Pt and Pt–10Rh/Pt Thermocouples, in Temperature: its Measurement and Control in Science and Industry (2003) Vol. 7, pp. 475–480
F. Edle, H.J. Jung, H. Maas, J.Y. Le Pommele, CCT/93-5, A provisional reference function for platinum vs. palladium thermocouples in the range 0 °C until 1084 °C (1993), Vol. 1, pp. 1–3
L. Crovini, A. Ctis, V. Fernicola, R. Galleano, CCT/93-17, On the behavior of platinum palladium thermocouples from 600 °C to 1100 °C (1993), pp. 1–5
E. Renaot, M. Elgourdou, E. Devin, M. Liedberg, Contribution to a reference function for Pt/Pd thermocouples from 0 °C to 960 °C, in EUROMET Workshop Temperature, Paris, France, 1998, pp. 113–118
Burns, G.W., Ripple, D.C., Battuello, M., Platinum versus palladium thermocouples: an emf-temperature reference function for the 0 °C to 1500 °C, Metrologia 35, 761–780 (1998) CrossRefGoogle Scholar
Manual on the Use Thermocouples in Temperature Measurements, ASTM Manual Series MNL (1993), Vol. 12, pp 289–290
Expression of the Uncertainty of Measurement in Calibration, EURAMET publication EA-4/02 (1999), pp. 25–30
D. Ripple, K. Garrity, Uncertainty Budgets for Comparison Calibrations of Thermocouples, in NCSL Int. Workshop and Symp. 2006, Vol. 1, pp. 28–35