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RISS 인기검색어
- 검색키워드
- 저자 : K. Yamazawa (검색결과 3 건)
- 무료
- 기관 내 무료
- 유료
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Final report for the APMP.T-K4: Comparison of realizations of aluminium freezing-point temperatures
Gam, K S,Joung, W,Yamazawa, K,Cheung, C P,Kho, H Y,Wang, L,Tsai, S F,Norranim, U,Hafidzah, O,Gupta, J K Springer-Verlag 2013 Metrologia Vol.50 No.-
<P>The comparison APMP.T-K4 is the regional extension of the CCT-K4: an intercomparison of the realizations of the freezing-points of Al (660.323 °C) and Ag (961.78 °C). The comparison was organized in two loops and four sub-loops with high temperature standard platinum resistance thermometers (HTSPRTs) as transfer thermometers in the freezing-point comparisons. The comparison involved eight APMP NMIs (KRISS, NMIJ, SCL, NMC, CMS, NIMT, SIRIM, NPL), and KRISS and NMIJ acted as linking laboratories to the CCT-K4.</P><P>The transfer HTSPRTs showed a strong drift during the transportation between the NMIs. In the case of the Ag freezing-point comparison, the comparison results were scattered much more than expected. In the APMP meeting held in 2009, the participants agreed that the Ag comparison results would be omitted in the report. It revealed that the measurement results at the Al freezing-point of participants were in agreement with the key comparison reference value of the CCT-K4 within 4 mK except for one laboratory. Details of the comparison results, the uncertainty evaluation and the drift of the HTSPRTs are described in this report.</P><P>Main text.To reach the main text of this paper, click on Final Report. Note that this text is that which appears in Appendix B of the BIPM key comparison database kcdb.bipm.org/.</P><P>The final report has been peer-reviewed and approved for publication by the CCT, according to the provisions of the CIPM Mutual Recognition Arrangement (CIPM MRA).</P>
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K. Yamazawa,K. Anso,J. V. Widiatmo,M. Arai 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8
This paper describes the preliminary measurements of the precise comparison between a radiation thermometer and a platinum resistance thermometer (PRT). The aim of this work is to measure the resistance -temperature relation of standard platinum resistance thermometers at temperatures above the present upper limit (961.78??C) of PRTs. The comparison furnace is placed in horizontal orientation, and a graphite block is placed in the center as acomparison block. In this paper, preliminary measurement results for the evaluation of the uncertainty in the comparisonmeasurement are reported. First, the results of the comparison using the design configuration determined in our previouspaper are reported. Upon the measurements of three independent experimental rounds, we suspected that the design of the comparison block needed some improvements. We re-designed the comparison block, and also report the comparison results obtained using this improved version.
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Study on the Realization of Zinc Point
J. V. Widiatmo,M. Sakai,K. Yamazawa,K. Satou,J. Tamba,M. Arai 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8
Two zinc-point cells were fabricated using high grade zinc samples, impurity elements of one of which were analyzed extensively. Temperature measurements during the solid-liquid coexistence, under which the zinc fixed-point is defined, were conducted, the result of which was used to perform a thermal analysis. Comparisons of zinc-point temperature realized within the newly fabricated cells were also conducted. Zinc-point depression due to impurity elements was calculated based on the chemical element analysis. Evaluation was made on the thermal analysis, the cell comparison results and the chemical element analysis, to lead to an estimation of uncertainty caused by the impurity elements. The present paper outlines the cell fabrication, the temperature measurements and the evaluation of impurity effect to the zinc-point realization.
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