Evaluation of the uncertainty component due to resistance measurement in the calibration of PRTs at the Al freezing point

Author

Yamazawa, Kazuaki ; Harada, Katsuhiko ; Arai, Masaru

Author_Institution

Nat. Inst. of Adv. Ind. Sci. & Technol., Nat. Metrol. Inst. of Japan, Tsukuba, Japan

Volume

4

fYear

2002

fDate

5-7 Aug. 2002

Firstpage

2444

Abstract

The uncertainty component due to resistance measurement in determining the resistance ratio W(=R_tal/R_tpw) at Al freezing point is evaluated. The sources of uncertainty dealt are, (1) the accuracy of the bridge, (2) the non-linearity of the current applied in the measuring bridge, (3) the non-linearity of the bridge reading value, (4) the difference among different measuring bridges and (5) the short-term stability of the standard resistor. The uncertainty value is found to depend on the structures of thermometers.

Keywords

bridge instruments; calibration; critical points; electric resistance measurement; freezing; measurement uncertainty; platinum; resistance thermometers; stability; Al; Al freezing point; Pt resistance thermometers; bridge accuracy; resistance measurement; resistance ratio; temperature measurement; uncertainty component evaluation; Bridges; Calibration; Current measurement; Electrical resistance measurement; Measurement standards; Metrology; Platinum; Resistors; Stability; Thermal resistance;

fLanguage

English

Publisher

ieee

Conference_Titel

SICE 2002. Proceedings of the 41st SICE Annual Conference

Print_ISBN

0-7803-7631-5

Type

conf

DOI

10.1109/SICE.2002.1195795

Filename

1195795