Intercomparison of the realization of the ITS-90 at the freezing points of Al and Ag among European NMIs

D. Heyer, U. Noatsch, E. Tegeler (Corresponding Author), M. Anagnostou, E. Turzo-Andras, I. Antonsen, V. Augevicius, J. Bojkovski, A. Bronnum, V. Chimenti, S. Duris, E. Filipe, S. Gaita, J. Gray, D. Head, E. Grudniewicz, J. Ivarsson, M. Kalemci, O. Kerkhof, I. LoboS. Nemeth, A. Pokhodun, J. Ranostaj, E. Renaot, P. Rosenkranz, Marek Smid, P. Steur, Anton Steiner, M. Valin, Tomislav Veliki, Thua Weckström

Research output: Contribution to journalArticleScientificpeer-review

8 Citations (Scopus)

Abstract

The EUROMET.T-K4 comparison is the regional extension of CCT-K4, an intercomparison of the realizations of the freezing points of Al (660.323°C) and Ag (961.78°C). The intercomparison was organized in four loops. Long-stem standard platinum resistance thermometers (SPRTs) were used as traveling standards: 25 O thermometers to be used only at the Al freezing point and two high-temperature standard platinum resistance thermometers (HTSPRTs) to be used only at the Ag freezing point in each loop. Parallel to the measurements with thermometers, the pilots and sub-pilots organized an internal intercomparison using an Ag fixed-point cell. Most HTSPRTs showed a strong drift which is mainly due to mechanical stress and poisoning of the sensor by impurities. This drift can be partially compensated by a correction based on Matthiessen's rule. An evaluation of the data taking into account both HTSPRTs in each loop, the linkage of the sub-pilots by measurements at the Ag freezing point, and a possible compensation according to Matthiessens's rule, allows calculation of the results of the participants' measurements at the Ag freezing point. The results of the participating laboratories are summarized, and proposals for key comparison reference values and linking of the results to CCT-K3 and CCT-K4 are presented.
Original languageEnglish
Pages (from-to)1964-1975
JournalInternational Journal of Thermophysics
Volume28
Issue number6
DOIs
Publication statusPublished - 2007
MoE publication typeA1 Journal article-refereed

Fingerprint

melting points
resistance thermometers
platinum
thermometers
poisoning
stems
linkages
proposals
impurities
evaluation
sensors
cells

Keywords

  • Al freezing point
  • Ag freezing point
  • CCT
  • EUROMET
  • Fixed points
  • High-temperature standard platinum resistance thermometers
  • Key comparison
  • Matthiessen's rule

Cite this

Heyer, D., Noatsch, U., Tegeler, E., Anagnostou, M., Turzo-Andras, E., Antonsen, I., ... Weckström, T. (2007). Intercomparison of the realization of the ITS-90 at the freezing points of Al and Ag among European NMIs. International Journal of Thermophysics, 28(6), 1964-1975. https://doi.org/10.1007/s10765-007-0283-y
Heyer, D. ; Noatsch, U. ; Tegeler, E. ; Anagnostou, M. ; Turzo-Andras, E. ; Antonsen, I. ; Augevicius, V. ; Bojkovski, J. ; Bronnum, A. ; Chimenti, V. ; Duris, S. ; Filipe, E. ; Gaita, S. ; Gray, J. ; Head, D. ; Grudniewicz, E. ; Ivarsson, J. ; Kalemci, M. ; Kerkhof, O. ; Lobo, I. ; Nemeth, S. ; Pokhodun, A. ; Ranostaj, J. ; Renaot, E. ; Rosenkranz, P. ; Smid, Marek ; Steur, P. ; Steiner, Anton ; Valin, M. ; Veliki, Tomislav ; Weckström, Thua. / Intercomparison of the realization of the ITS-90 at the freezing points of Al and Ag among European NMIs. In: International Journal of Thermophysics. 2007 ; Vol. 28, No. 6. pp. 1964-1975.
@article{58c2a74d65f34735a638b4662f17c0c7,
title = "Intercomparison of the realization of the ITS-90 at the freezing points of Al and Ag among European NMIs",
abstract = "The EUROMET.T-K4 comparison is the regional extension of CCT-K4, an intercomparison of the realizations of the freezing points of Al (660.323°C) and Ag (961.78°C). The intercomparison was organized in four loops. Long-stem standard platinum resistance thermometers (SPRTs) were used as traveling standards: 25 O thermometers to be used only at the Al freezing point and two high-temperature standard platinum resistance thermometers (HTSPRTs) to be used only at the Ag freezing point in each loop. Parallel to the measurements with thermometers, the pilots and sub-pilots organized an internal intercomparison using an Ag fixed-point cell. Most HTSPRTs showed a strong drift which is mainly due to mechanical stress and poisoning of the sensor by impurities. This drift can be partially compensated by a correction based on Matthiessen's rule. An evaluation of the data taking into account both HTSPRTs in each loop, the linkage of the sub-pilots by measurements at the Ag freezing point, and a possible compensation according to Matthiessens's rule, allows calculation of the results of the participants' measurements at the Ag freezing point. The results of the participating laboratories are summarized, and proposals for key comparison reference values and linking of the results to CCT-K3 and CCT-K4 are presented.",
keywords = "Al freezing point, Ag freezing point, CCT, EUROMET, Fixed points, High-temperature standard platinum resistance thermometers, Key comparison, Matthiessen's rule",
author = "D. Heyer and U. Noatsch and E. Tegeler and M. Anagnostou and E. Turzo-Andras and I. Antonsen and V. Augevicius and J. Bojkovski and A. Bronnum and V. Chimenti and S. Duris and E. Filipe and S. Gaita and J. Gray and D. Head and E. Grudniewicz and J. Ivarsson and M. Kalemci and O. Kerkhof and I. Lobo and S. Nemeth and A. Pokhodun and J. Ranostaj and E. Renaot and P. Rosenkranz and Marek Smid and P. Steur and Anton Steiner and M. Valin and Tomislav Veliki and Thua Weckstr{\"o}m",
year = "2007",
doi = "10.1007/s10765-007-0283-y",
language = "English",
volume = "28",
pages = "1964--1975",
journal = "International Journal of Thermophysics",
issn = "0195-928X",
publisher = "Springer",
number = "6",

}

Heyer, D, Noatsch, U, Tegeler, E, Anagnostou, M, Turzo-Andras, E, Antonsen, I, Augevicius, V, Bojkovski, J, Bronnum, A, Chimenti, V, Duris, S, Filipe, E, Gaita, S, Gray, J, Head, D, Grudniewicz, E, Ivarsson, J, Kalemci, M, Kerkhof, O, Lobo, I, Nemeth, S, Pokhodun, A, Ranostaj, J, Renaot, E, Rosenkranz, P, Smid, M, Steur, P, Steiner, A, Valin, M, Veliki, T & Weckström, T 2007, 'Intercomparison of the realization of the ITS-90 at the freezing points of Al and Ag among European NMIs', International Journal of Thermophysics, vol. 28, no. 6, pp. 1964-1975. https://doi.org/10.1007/s10765-007-0283-y

Intercomparison of the realization of the ITS-90 at the freezing points of Al and Ag among European NMIs. / Heyer, D.; Noatsch, U.; Tegeler, E. (Corresponding Author); Anagnostou, M.; Turzo-Andras, E.; Antonsen, I.; Augevicius, V.; Bojkovski, J.; Bronnum, A.; Chimenti, V.; Duris, S.; Filipe, E.; Gaita, S.; Gray, J.; Head, D.; Grudniewicz, E.; Ivarsson, J.; Kalemci, M.; Kerkhof, O.; Lobo, I.; Nemeth, S.; Pokhodun, A.; Ranostaj, J.; Renaot, E.; Rosenkranz, P.; Smid, Marek; Steur, P.; Steiner, Anton; Valin, M.; Veliki, Tomislav; Weckström, Thua.

In: International Journal of Thermophysics, Vol. 28, No. 6, 2007, p. 1964-1975.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Intercomparison of the realization of the ITS-90 at the freezing points of Al and Ag among European NMIs

AU - Heyer, D.

AU - Noatsch, U.

AU - Tegeler, E.

AU - Anagnostou, M.

AU - Turzo-Andras, E.

AU - Antonsen, I.

AU - Augevicius, V.

AU - Bojkovski, J.

AU - Bronnum, A.

AU - Chimenti, V.

AU - Duris, S.

AU - Filipe, E.

AU - Gaita, S.

AU - Gray, J.

AU - Head, D.

AU - Grudniewicz, E.

AU - Ivarsson, J.

AU - Kalemci, M.

AU - Kerkhof, O.

AU - Lobo, I.

AU - Nemeth, S.

AU - Pokhodun, A.

AU - Ranostaj, J.

AU - Renaot, E.

AU - Rosenkranz, P.

AU - Smid, Marek

AU - Steur, P.

AU - Steiner, Anton

AU - Valin, M.

AU - Veliki, Tomislav

AU - Weckström, Thua

PY - 2007

Y1 - 2007

N2 - The EUROMET.T-K4 comparison is the regional extension of CCT-K4, an intercomparison of the realizations of the freezing points of Al (660.323°C) and Ag (961.78°C). The intercomparison was organized in four loops. Long-stem standard platinum resistance thermometers (SPRTs) were used as traveling standards: 25 O thermometers to be used only at the Al freezing point and two high-temperature standard platinum resistance thermometers (HTSPRTs) to be used only at the Ag freezing point in each loop. Parallel to the measurements with thermometers, the pilots and sub-pilots organized an internal intercomparison using an Ag fixed-point cell. Most HTSPRTs showed a strong drift which is mainly due to mechanical stress and poisoning of the sensor by impurities. This drift can be partially compensated by a correction based on Matthiessen's rule. An evaluation of the data taking into account both HTSPRTs in each loop, the linkage of the sub-pilots by measurements at the Ag freezing point, and a possible compensation according to Matthiessens's rule, allows calculation of the results of the participants' measurements at the Ag freezing point. The results of the participating laboratories are summarized, and proposals for key comparison reference values and linking of the results to CCT-K3 and CCT-K4 are presented.

AB - The EUROMET.T-K4 comparison is the regional extension of CCT-K4, an intercomparison of the realizations of the freezing points of Al (660.323°C) and Ag (961.78°C). The intercomparison was organized in four loops. Long-stem standard platinum resistance thermometers (SPRTs) were used as traveling standards: 25 O thermometers to be used only at the Al freezing point and two high-temperature standard platinum resistance thermometers (HTSPRTs) to be used only at the Ag freezing point in each loop. Parallel to the measurements with thermometers, the pilots and sub-pilots organized an internal intercomparison using an Ag fixed-point cell. Most HTSPRTs showed a strong drift which is mainly due to mechanical stress and poisoning of the sensor by impurities. This drift can be partially compensated by a correction based on Matthiessen's rule. An evaluation of the data taking into account both HTSPRTs in each loop, the linkage of the sub-pilots by measurements at the Ag freezing point, and a possible compensation according to Matthiessens's rule, allows calculation of the results of the participants' measurements at the Ag freezing point. The results of the participating laboratories are summarized, and proposals for key comparison reference values and linking of the results to CCT-K3 and CCT-K4 are presented.

KW - Al freezing point

KW - Ag freezing point

KW - CCT

KW - EUROMET

KW - Fixed points

KW - High-temperature standard platinum resistance thermometers

KW - Key comparison

KW - Matthiessen's rule

U2 - 10.1007/s10765-007-0283-y

DO - 10.1007/s10765-007-0283-y

M3 - Article

VL - 28

SP - 1964

EP - 1975

JO - International Journal of Thermophysics

JF - International Journal of Thermophysics

SN - 0195-928X

IS - 6

ER -