Comparing fixed points of the ITS-90 as realized in Canada, Argentina and Brazil

被引：4

作者：

Ancsin, J ^{[1
]}

Tischler, M

Petkovic, SG

Santiago, JFN

机构：

[1] Natl Res Council Canada, Inst Natl Measurement Stand, Ottawa, ON K1A 0R6, Canada

[2] INTI, RA-1650 Buenos Aires, DF, Argentina

[3] INMETRO, Rio De Janeiro, Brazil

来源：

METROLOGIA | 2001年 / 38卷 / 06期

关键词：

D O I：

10.1088/0026-1394/38/6/11

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

A set of fixed points maintained by national metrology institutes (NMIs) for calibrating platinum resistance thermometers (PRTs) in Canada (National Research Council, NRC), Argentina (Instituto Nacional de Tecnologia Industrial, INTI) and Brazil (Instituto Nacional de Metrologia, Normalizacao e Qualidade Industrial, INMETRO) were compared using two methods. A set of portable cells was used in one method, and in the other a calibrated PRT. The fixed-point differences were as follows. For the INTI the differences DeltaT = T(INTI) -T(NRC) found at the Ag, Al, Zn, Sn, In, Ga and Hg points were 3.5 mK, 2.8 mK, 1.8 mK, -0.5 mK, 0.2 mK, -0.2 mK and -0.5 mK, respectively. For the INMETRO the differences DeltaT = T(INMETRO) - T(NRC) at the above fixed points are 0.7 mK, 3.3 mK, -1.3 mK, -1.9 mK, -0.3 mK, -0.1 mK, -0.4 mK, respectively, and 0.8 mK at the Ar point.

引用

页码：555 / 566

页数：12

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