An Alternative Method for Manufacturing Water Triple-Point Cells

Quelhas, Klaus N.; Teixeira, R. N.

doi:10.1007/s10765-014-1732-z

Cited by 3 publications

(3 citation statements)

References 5 publications

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“…Currently, the TPW is one of the defining fixed-points in the ITS-90 and has the assigned temperature value of 273.16 K [10]. Therefore, the TPW cells were studied thoroughly in the frame of contact thermometry [19][20][21][22][23][24][25]. Accordingly, in the design of the large area TPW (LATPW) for the TPWBBs, it was proposed to keep maximally the geometry of traditional TPW cells used in contact thermometry and to use the thermometer well of the cells as a holder for the cavity, thus ensuring that the necessary isothermality is achieved.…”

Section: The Design and Maintenance Of The Tpwbbsmentioning

confidence: 99%

A triple point of water cell-based fixed-point blackbody for radiation thermometry

Yurtseven¹,

Uytun²,

Nasibov³

2022

Meas. Sci. Technol.

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The radiation temperature metrology above 150 °C relies heavily on the use of physical interpolation equations and known reference temperature (provided by solid-liquid phase transition of high-purity metals and metal-carbon eutectic alloys) fixed-point blackbodies. Recent achievements in thermal infrared detector technologies triggered the extension of the scale interpolation below this temperature down to 0 °C by using the reference temperatures provided by Sn, In, Ga fixed-points and ice-point, where the reference temperature of the later is dependent on external parameters. In this work, we demonstrate that the triple-point of water (TPW) based fixed-point blackbody is the metrologically grounded alternative to the ice-point. For this purpose, a fixed-point blackbody, incorporating only a cavity and large area TPW cell (LATPW) was designed, constructed, and validated for the precise calibration of radiation thermometers and thermal cameras at the thermodynamic temperature of TPW. The conceptual design of the LATPW cells is similar to the ones used in contact thermometry, where a thermometer well of the cell is employed as a borehole for a cavity, where the cavity is easily detachable. Four different cavities (two different designs with aperture sizes of 40 mm and 50 mm) and three LATPW cells with two distinct well geometries were comparatively studied in several combinations. The largest absolute temperature difference observed between the primary level reference TPW cell (used in contact thermometry) and the LATPW cells is measured to be only 0.37 mK. Radiometric measurements demonstrate that all radiators maximally reflect the blackbody condition including emissivity close to unity, high uniformity across the aperture and high temporal stability. The simplicity of maintenance and easy in-field usage (only distilled water and dry ice are required) make the TPW blackbodies very versatile for the in-situ calibrations of radiation thermometers and thermal cameras, allowing its application in many areas including clinical environments.

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Section: The Design and Maintenance Of The Tpwbbsmentioning

confidence: 99%

A triple point of water cell-based fixed-point blackbody for radiation thermometry

Yurtseven¹,

Uytun²,

Nasibov³

2022

Meas. Sci. Technol.

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“…There are four different techniques to prepare the ice mantle: using dry ice (solid CO 2 ), an immersion cooler, liquid-nitrogen-cooled rods, and liquid nitrogen [9][10][11][12]. In this experiment dry ice method was used to prepare and characterize TPW.…”

Section: Preparation Of Tpw Cellmentioning

confidence: 99%

Experimental demonstration of the thermodynamic temperature unit kelvin

Alper¹

2021

Phys. Educ.

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This study focuses on the experimental demonstration of the definition of kelvin using a triple point of water (TPW) cell and estimates the measurement uncertainty. The first part of this article is to construct the measurement setup and perform the measurements. The second stage is related with the calculation of uncertainty according to guides to the expression of uncertainty in measurement. The experiment in this study can be a practical and convenient method to show the unit as the fraction 1/273.16 of the thermodynamic temperature of the TPW, 273.16 K.

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“…Soğuk daldırma çubuğu, katı CO2 ve sıvı nitrojen yöntemi literatürde yaygın olarak kullanılan yöntemler arasındadır. [5,9,10,11,12] 2. ÖLÇÜMLER…”

Section: Introductionunclassified

Standart Platin Direnç Termometrelerin Suyun Üçlü Noktası Hücresinde Kalibrasyonu ve Ölçüm Belirsizliği Hesabı

Alper

2020

Academic Platform Journal of Engineering and Science

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Bu çalışmada direnç termometrelerin kalibrasyonların da ve kontrollerinde kullanılan suyun üçlü noktası hücresinin hazırlanması ve ölçüm belirsizliğinin hesaplanmasına ilişkin detaylı bilgi verilmiştir. Suyun üçlü noktası hücresi Yeditepe Üniversitesi Fizik Bölümü Metroloji ve Kalibrasyon Laboratuvarında (YUKAL) özel olarak tasarlanarak üretilmiştir. Hücrenin hazırlanması aşamasında katı CO2 kullanılarak buz tabakası elde edilmiştir. Katı CO2 yöntemiyle 15 dakikalık sürede hücre içerisinde katı, sıvı ve gaz fazlarının aynı anda elde edildiği bu yöntemle yapılan ölçümler analiz edilerek ölçüm belirsizliği bütçesi oluşturulmuştur.

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An Alternative Method for Manufacturing Water Triple-Point Cells

Cited by 3 publications

References 5 publications

A triple point of water cell-based fixed-point blackbody for radiation thermometry

A triple point of water cell-based fixed-point blackbody for radiation thermometry

Experimental demonstration of the thermodynamic temperature unit kelvin

Standart Platin Direnç Termometrelerin Suyun Üçlü Noktası Hücresinde Kalibrasyonu ve Ölçüm Belirsizliği Hesabı

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