Abstract
At NPL, high-temperature metal-carbon eutectic fixed points have been set up for thermocouple calibration purposes since 2006, for realising reference temperatures above the highest point specified in the International Temperature Scale of 1990 for contact thermometer calibrations. Additionally, cells of the same design have been provided by NPL to other national measurement institutes (NMIs) and calibration laboratories over this period, creating traceable and ISO 17025 accredited facilities around the world for calibrating noble metal thermocouples at \(1324~{^{\circ }}\)C (Co–C) and \(1492~{^{\circ }}\)C (Pd–C). This paper shows collections of thermocouple calibration results obtained during use of the high-temperature fixed-point cells at NPL and, as further examples, the use of cells installed at CCPI Europe (UK) and NIMT (Thailand). The lifetime of the cells can now be shown to be in excess of 7 years, whether used on a weekly or monthly basis, and whether used in an NMI or industrial calibration laboratory.
Similar content being viewed by others
References
Y. Yamada, F. Sakuma, A. Ono, Metrologia 37, 71–73 (2000)
E.R. Woolliams, G. Machin, D.H. Lowe, R. Winkler, Metrologia 43, R11–25 (2006)
J.V. Pearce, Aerosp. Manuf. 24–25 (2007). https://www.aero-mag.com/digital-editions/january-2016/
J.V. Pearce, G. Machin, T. Ford, S. Wardle, Acta Metrol. Sin. 29, 86–89 (2008)
J. Pearce, G. Machin, T. Ford, S. Wardle, Int. J. Thermophys. 29, 222–230 (2008)
F. Edler, R. Morice, J. Pearce, Int. J. Thermophys. 29, 199–209 (2008)
C.J. Elliott, J.V. Pearce, G. Machin, T. Ford, K. Hicks, A.I.P. Conf. Proc. 1552, 549–553 (2013)
O. Ongrai, J. Pearce, G. Machin, S. Sweeney, Int. J. Thermophys. 31, 1506–1516 (2010)
F. Jahan, M. Ballico, Temp. Meas. Control Sci. Ind. 7, 523–528 (2003)
R. Morice et al., Int. J. Thermophys. 231, 29 (2008)
M. Sadli et al., Acta Metrol. Sin. 29, 59–64 (2008). [Temp Beijing 08, China]
M. Sadli et al., Int. J. Thermophys. 32, 1786–1799 (2011). [Tempmeko ’10]
L. Kňazovická et al., Metrologia 52, 353–359 (2015)
R.N. Teixeira, G. Machin, Int. J. Thermophys. 38, 80 (2017)
Y. Yamada et al., Int. J. Thermophys. (2016) (submitted)
F. Edler, R. Morice, H. Ogura, J. Pearce, Metrologia 47, 90 (2010)
J.V. Pearce et al., Metrologia 48, 375 (2011)
BS EN 62460-2008 (Pt/Pd thermocouples)
IEC (BS EN) 60584-1:2013 (Pt–Rh types)
G.W. Burns, D.C. Ripple, M. Battuello, Metrologia 35, 761 (1998)
M.J. Coleman, T.J. Wiandt, T. Harper, Int. J. Thermophys. 36, 3384 (2015)
Author information
Authors and Affiliations
Corresponding author
Additional information
Selected Papers of the 13th International Symposium on Temperature, Humidity, Moisture and Thermal Measurements in Industry and Science.
Rights and permissions
About this article
Cite this article
Elliott, C.J., Ford, T., Ongrai, O. et al. Reliability of High-Temperature Fixed-Point Installations over 8 Years. Int J Thermophys 38, 177 (2017). https://doi.org/10.1007/s10765-017-2313-8
Received:
Accepted:
Published:
DOI: https://doi.org/10.1007/s10765-017-2313-8