CCT-K2.4: NRC/INTiBS/LNE-Cnam trilateral comparison of capsule-type standard platinum resistance thermometers from 13.8 K to 273.16 K

Hill, Kathryn; Szmyrka-Grzebyk, A.; Lipiński, L.; Hermier, Y.; Pitre, Laurent; Sparasci, F.

doi:10.1088/0026-1394/49/1a/03005

Cited by 4 publications

(7 citation statements)

References 10 publications

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“…The two largest additions are 'triple point value' and 'electrical measurements'. 'Triple point value' is the documented reproducibility of neon triple points during 2012 interlaboratory comparisons [36]. It is likely that future work can reduce this uncertainty to 0.015 mK (reproducibility of the fix point has been substantially improved and LNE-Cnam has recently started a series of bilateral intercomparisons [8]).…”

Section: Uncertainty Of T Ne and Of Calibrating A Pt-co Thermometer With Agtmentioning

confidence: 99%

Acoustic measurement of the triple point of neon T _Ne and thermodynamic calibration of a transfer standard for accurate cryogenic thermometry

et al. 2021

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We used absolute primary acoustic gas thermometry (AGT) to calibrate a Pt–Co resistance thermometer on the thermodynamic temperature scale by measuring the speed of sound in helium at a temperature T* chosen to be near the temperature of the triple point of neon, T Ne. Prior to the present AGT, the Pt–Co thermometer was used with a neon triple-point cell as part of an interlaboratory comparison. Taken together, the results of the interlaboratory comparison and the present AGT redetermined the thermodynamic temperature T Ne = (24.555 15 ± 0.000 24) K. This new value of T Ne is consistent with other recent determinations obtained with various primary methods. After completing the AGT thermodynamic calibration, we used the Pt–Co thermometer to link T* to the temperature ratios measured by single-pressure refractive-index gas thermometry (SPRIGT) in a different laboratory. (Gao et al 2020 Metrologia 57 065006) Now, the T*-linked SPRIGT system can calibrate other thermometers on the thermodynamic temperature scale T in the range 5 K ⩽ T ⩽ T Ne without using the international temperature scale ITS-90. At most temperatures in this range, the uncertainties of the T*-linked SPRIGT system are smaller than those of the ITS-90 systems used by National Metrology Institutes to calibrate resistance thermometers.

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Section: Uncertainty Of T Ne and Of Calibrating A Pt-co Thermometer With Agtmentioning

confidence: 99%

Acoustic measurement of the triple point of neon T _Ne and thermodynamic calibration of a transfer standard for accurate cryogenic thermometry

et al. 2021

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“…The reference thermometer is a Capsule‐type Standard Platinum Resistance Thermometer (CSPRT), calibrated by the LNE‐CNAM according to the International Temperature Scale of 1990 (ITS‐90), at the highest degree of accuracy (Hill et al , ). It is connected with four electrical wires to a thermometry resistance bridge (Automatic Systems Laboratories, model F18), to be compared with a calibrated standard resistor (Tinsley, model 5685A).…”

Section: Calibration Devicementioning

confidence: 99%

Submillimetre thermistors for balloon‐borne applications up to lower stratosphere: preliminary characterization with 0.02 K uncertainty

Sparasci

Jouin

Deuzé

et al. 2015

Meteorological Applications

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ABSTRACT:The French metrological laboratory LNE-CNAM, in the framework of a study commissioned by the Laboratory of Dynamic Meteorology LMD, has carried out a preliminary metrological characterization of a device based on submillimetre thermistors, to be used for atmospheric temperature and humidity measurements from the ground up to the lower stratosphere. The device is a measuring system intended to perform temperature measurements between 173 K (around -100 ∘ C) and 233 K (around −40 ∘ C). It is composed of a self-manufactured electronic device, in which submillimetre thermistors measure both air temperature and the temperature of a hygrometer sensor, in order to determine accurately water vapour concentration. Since the needed final measurement uncertainty is below 0.05 K, a comprehensive metrological characterization must be performed. One instrument prototype was supplied to the LNE-CNAM, to be characterized between 173 K and 273 K (around 0 ∘ C). Measurements were carried out in the quasi-adiabatic calorimeter used by the LNE-CNAM to realize the national temperature standard below 84 K. The calorimeter was adapted to work at temperatures up to 273 K. At any setpoint between 173 K and 273 K, the stability of the temperature was within 5 mK for several hours. The thermistors were calibrated by comparison to a calibrated reference thermometer. Preliminary results showed that calibrations with an uncertainty of around 0.02 K are possible. Tests are going to be performed in situ by the LMD, and further characterizations will be carried out to assess the obtained uncertainties and check long-term reproducibility.

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“…The results have been compared with the data obtained with the previous liquid-cooled adiabatic calorimeter and have been linked to the CCT-K2 [1] and CCT-K2.4 [9] key comparison reference values. Details are given in [9], and only a synthesis of the results is reported in this paper. Table 1 Summary of the determinations of the heat capacity C C and the thermal resistance R S at the triple points of hydrogen and neon …”

Section: Measurements Between 14 K and 24 K: Hydrogen And Neon Triplementioning

confidence: 99%

“…The following paragraphs describe the experimental apparatus, as well as the results of some measurements performed between 14 K and 84 K. The results are compared with data from the CCT-K2 comparison and from one of its more recent extensions, the CCT-K2.4 [9], in which the LNE-CNAM is involved.…”

Section: Introductionmentioning

confidence: 99%

An Adiabatic Calorimeter for the Realization of the ITS-90 in the Cryogenic Range at the LNE-CNAM

et al. 2011

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The LNE-CNAM, in cooperation with the IPN, has recently developed a new cryogen-free adiabatic calorimeter, to realize the International Temperature Scale of 1990 (ITS-90) in the temperature range between 6 K and 84 K. The new calorimeter, cooled by a closed-cycle Gifford-McMahon refrigerator, is equipped with three thermal shields and two separate vacuum chambers, to minimize the effect of parasitic heat fluxes. The inner adiabatic chamber can accommodate either a multi-compartment cell--containing the triple points of hydrogen, neon, oxygen, and argon, to realize the ITS-90 between 14 K and 84 K--or a comparison block for thermometers, the calibration of rhodium-iron (RhFe) thermometers between 6 K and 24 K. The use of a cryogen-free system and a fully computer-controlled measurement chain allow long lasting experiments and good thermal control, resulting in a substantial reduction of the measurement uncertainties. The new adiabatic calorimeter has been successfully tested at the LNE-CNAM. The overall standard uncertainties in the realization of the ITS-90 have been reduced from 2.08 mK to 0.37 mK at the hydrogen triple point, from 1.40 mK to 0.30 mK at the triple point of neon, and are maintained below 0.26 mK at the triple points of oxygen and argon. In the temperature range between 6 K and 24 K, calibrations of rhodium-iron resistance thermometers have been carried out with a standard uncertainty of the order of 0.80 mK

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CCT-K2.4: NRC/INTiBS/LNE-Cnam trilateral comparison of capsule-type standard platinum resistance thermometers from 13.8 K to 273.16 K

Cited by 4 publications

References 10 publications

Acoustic measurement of the triple point of neon T _Ne and thermodynamic calibration of a transfer standard for accurate cryogenic thermometry

Acoustic measurement of the triple point of neon T _Ne and thermodynamic calibration of a transfer standard for accurate cryogenic thermometry

Submillimetre thermistors for balloon‐borne applications up to lower stratosphere: preliminary characterization with 0.02 K uncertainty

An Adiabatic Calorimeter for the Realization of the ITS-90 in the Cryogenic Range at the LNE-CNAM

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CCT-K2.4: NRC/INTiBS/LNE-Cnam trilateral comparison of capsule-type standard platinum resistance thermometers from 13.8 K to 273.16 K

Cited by 4 publications

References 10 publications

Acoustic measurement of the triple point of neon T Ne and thermodynamic calibration of a transfer standard for accurate cryogenic thermometry

Acoustic measurement of the triple point of neon T Ne and thermodynamic calibration of a transfer standard for accurate cryogenic thermometry

Submillimetre thermistors for balloon‐borne applications up to lower stratosphere: preliminary characterization with 0.02 K uncertainty

An Adiabatic Calorimeter for the Realization of the ITS-90 in the Cryogenic Range at the LNE-CNAM

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Acoustic measurement of the triple point of neon T _Ne and thermodynamic calibration of a transfer standard for accurate cryogenic thermometry

Acoustic measurement of the triple point of neon T _Ne and thermodynamic calibration of a transfer standard for accurate cryogenic thermometry