APMP Scale Comparison with Three Radiation Thermometers and Six Fixed-Point Blackbodies

Yamada, Yoshiro; Shimizu, Yoshitaka; Ishii, Juntaro

doi:10.1007/s10765-015-1858-7

Cited by 3 publications

(4 citation statements)

References 5 publications

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Mentioning

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Order By: Relevance

“…This order corresponds to the dimensions of the furnaces in terms of tube diameters. The obtained effective diameter of the S cell in the Chino agrees with that of the L cell in the Chino in the literature [13], and the same value was also applied for the L cell. Meanwhile, for the 3-zone furnace, scanning was performed for both cells, Table 1.…”

Section: Temperature Difference For the Same Cell In Different Furnacessupporting

confidence: 81%

“…First, the effective diameter [13,14] of the cell in the furnace is calculated. This parameter enables one to easily compare the SSE of furnaces which have different radiance distributions.…”

Section: Calculation Of Sse Correctionmentioning

confidence: 99%

“…The radiance distribution around the cell, viewed from the front of the furnace, is denoted as ( ) ′ V R , where R represents the distance from the aperture centre. This is obtained in advance by performing a linear scan with a radiation thermometer slightly tilted against the furnace tube axis to avoid vignetting [13]. If the radiance distribution is radially symmetric, the detected signal can be denoted as ( )…”

Section: Calculation Of Sse Correctionmentioning

confidence: 99%

See 2 more Smart Citations

Experimental study of the furnace effect with the copper point blackbody

Imbe

Yamada

2016

Meas. Sci. Technol.

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The furnace effect is a major uncertainty source in the realization of high-temperature fixed points in metal–carbon systems. The cause of this effect is as yet unexplained, and understanding it is a high-priority task for the inclusion of fixed points in future high-temperature metrology. In this paper, the furnace effect is studied experimentally and systematically with three furnaces, two cells, and two radiation thermometers. The copper point is chosen for the fixed point of investigation in order to eliminate the influence of the properties of the furnace. Correction for drift and the size-of-source effect of the thermometer is applied to achieve the required measurement accuracy. As a result, the furnace effect has been demonstrated quantitatively for the first time as the difference in radiance temperature of the same cell observed in different furnaces by the same thermometer. The experimental results show that it is related to the dimension of the furnace and the design of the fixed-point blackbody cell.

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Section: Temperature Difference For the Same Cell In Different Furnacessupporting

confidence: 81%

Section: Calculation Of Sse Correctionmentioning

confidence: 99%

Section: Calculation Of Sse Correctionmentioning

confidence: 99%

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Experimental study of the furnace effect with the copper point blackbody

Imbe

Yamada

2016

Meas. Sci. Technol.

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“…For guidance and best and normal uncertainties, see [5]. For an approach tailored to calibration of radiation thermometers by fixed point blackbodies see [20,23,24]. In [24], an uncertainty between 0.012 K and 0.015 K was arrived at for the SSE at the Re-C point.…”

Section: Uncertainties Related To the Use Of Htfp Cellsmentioning

confidence: 99%

On the uncertainties in the realization of the kelvin based on thermodynamic temperatures of high-temperature fixed-point cells

Todd¹,

Anhalt²,

Bloembergen³

et al. 2021

Metrologia

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In July 2016 the Consultative Committee for Thermometry’s Non-Contact Thermometry Working Group formed a task group to compile a complete list of uncertainties for high-temperature fixed points, categorize them as well specified or not, and recommend areas of future research. We describe herein two paths to realizing T by indirect primary radiometry using high-temperature fixed-point blackbody cells: one in which published values for the metal–carbon eutectic material transition temperatures are used and the other where a set of cells has their transition temperatures determined directly. The uncertainty components that need to be considered for each path are given together with typically achievable values and how well those values are known. This work concentrates on Co–C, Pt–C and Re–C.

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