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White D.R.,New Zealand Institute for Industrial Research and Development | Ballico M.,Australian National Measurement Institute | Del Campo D.,Centro Espanol Of Metrologia Cem | Duris S.,Slovak Institute of Metrology | And 10 more authors.
International Journal of Thermophysics | Year: 2010

The CCT has completed the guide summarizing the uncertainties in the realization of the SPRT subranges of ITS-90 between the triple point of neon (24.5561 K) and the freezing point of silver (961.78 °C). This article identifies aspects of standard platinum resistance thermometry where either data or models are lacking and further research is required. In the calibration of SPRTs, the two main concerns are the need for data on liquidus slopes for the different impurities in the fixed points and improved understanding of the impact of the thermal environment of the fixed point on the realized temperature. In the use of SPRTs, the two largest sources of uncertainty are Types 1 and 3 non-uniqueness and oxidation. The causes of Type 3 non-uniqueness are not yet understood, especially at low temperatures, and there is a paucity of data for the high-temperature subranges. In respect of oxidation, there is a need for validation of the models developed in the 1980s, especially in light of the reduced partial pressure of oxygen used in modern SPRTs. A range of other effects including vacancy effects in SPRTs, isotopic effects in fixed points, and improved statistical methods are discussed. © Springer Science+Business Media, LLC 2010. Source

Machin G.,National Physical Laboratory United Kingdom | Bojkovski J.,University of Ljubljana | Del Campo D.,Centro Espanol Of Metrologia Cem | Dogan A.K.,Ulusal Metroloji Enstitusu UME | And 7 more authors.
International Journal of Thermophysics | Year: 2014

A technical roadmap for thermometry has been constructed by the EURAMET Technical Committee for Thermometry (TC-T). The roadmap first identified the key triggers that need to be addressed; these included societal grand challenges and the essential scientific metrology to ensure the continued fitness and relevance of the SI unit, the kelvin. In addition, triggers focusing on innovation to support industrial competitiveness such as improvement in product quality and energy efficiency were considered. Clear targets to help address the triggers were formulated; these in turn provide direction to the required temperature measurement research until 2025 and beyond. Although constructed by EURAMET TC-T, the identified societal grand challenges are common within all metrology regions; hence, the roadmap has wider applicability beyond the EURAMET region. A roadmap only ever captures current thinking at the time of formulation, and hence, as with all roadmaps, requires regular revision. For this roadmap this revision will be performed around 2016. This exercise identified that significant research and development were required by the thermometry community if it is to contribute to meet the grand challenges faced by society. The research areas identified here will inform and guide the direction of thermometry research of the national measurement institutes in the EURAMET region over the next decade. © 2014 Crown Copyright. Source

MacHin G.,National Physical Laboratory United Kingdom | Anhalt K.,Physikalisch - Technische Bundesanstalt | Battuello M.,INRIM - Istituto Nazionale di Ricerca Metrologica | Bourson F.,Laboratoire Communications Of Metrologie Lne And Cnam | And 14 more authors.
Measurement: Journal of the International Measurement Confederation | Year: 2016

High temperature measurement in industry is subject to large uncertainties due to the non-ideal measurement conditions; for example unknown emissivity and window transmission for radiation thermometry, sensor contamination and ageing causing unpredictable drift in contact thermometry. This paper gives an overview of a European Metrology Research Programme (EMRP) project "High Temperature Metrology for Industrial Applications" (HiTeMS) whose objective was to address, on a broad front, a number of unsolved measurement challenges in the domain of high temperatures (above 1000 °C) both in non-contact and contact thermometry. It brought together a total of 15 partner organisations; National Metrology Institutes (NMIs) (10), industrial companies (4) and a Fraunhofer Institute. The project started in September 2011 and was completed August 2014. Significant progress has been made in all the temperature measurement challenges tackled. © 2015 Published by Elsevier Ltd. All rights reserved. Source

Pavese F.,INRIM - Istituto Nazionale di Ricerca Metrologica | Fahr M.,National Research Council Canada | Hermier Y.,Laboratoire National Of Metrologie Et Dessays Lne | Hill K.D.,National Research Council Canada | And 11 more authors.
International Journal of Thermophysics | Year: 2010

Following the start of exploration of the problem of the effect of neon isotopes on the triple-point temperature in 2005, further progress was achieved in 2006-2008, and published in 2008. This paper summarizes the advances to date in our understanding as obtained from further work done in 2008-2009 on five basic aspects of the problem: new isotopic assays; new thermal measurements on neon of "natural" composition; the feasibility of obtaining a value of the slope dT tp/dx( 22Ne) with an accuracy sufficient for the purpose; the possible occurrence of isotopic fractionation during the process of sealing the samples in the cells; and new thermal measurements on the pure isotopes 20Ne and 22Ne. The recently collected information is sufficient to state that it will eventually be possible to fulfill within 2010 the goal of recommending to the CCT solutions for the correction, with an accuracy fitting the purpose, of the neon isotopic effect on T tp, to be included in a future revision of the Technical Annexe to the "mise en pratique" of the kelvin. © Springer Science+Business Media, LLC 2010. Source

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