An adiabatic calorimeter for calibrating capsule type thermometers (CSPRTs) in the range 54 K to 273 K-Reference-Cited by-同舟云学术

An adiabatic calorimeter for calibrating capsule type thermometers (CSPRTs) in the range 54 K to 273 K

Published:2012 Issue:2 Volume:3 Page:85-87
ISSN:2107-6839
Container-title:International Journal of Metrology and Quality Engineering
language:
Short-container-title:Int. J. Metrol. Qual. Eng.

Author:

Ahmed M.G.,El Matarawy A.A.

Abstract

A new comparison system has been constructed for the calibration of capsule-type standard platinum resistance thermometers (CSPRTs) below 273.16 K at the National Institute of Standards (NIS-Egypt). The system can compare two CSPRTs at once. A gold plated comparison block, in which CSPRTs are mounted for calibration, is made from oxygen-free high-conductivity copper. A description of the system and the comparison block along with the comparison method is given. The standard uncertainty related to the temperature control of the system is estimated to be 0.04 mK. The calibrated values for CSPRTs and obtained using the comparison system are in good agreement with those obtained by the direct realization of the low temperature fixed points of the ITS-90 within the combined standard uncertainty.

Publisher

EDP Sciences

Subject

Safety, Risk, Reliability and Quality

Link

http://www.metrology-journal.org/10.1051/ijmqe/2012015/pdf

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