Evaluation of calibration bath with two precision thermometers

Šestan, Danijel and Jugović, Antun (2015) Evaluation of calibration bath with two precision thermometers. = Evaluation of calibration bath with two precision thermometers. In: 11th International Conference, Croatian Laboratories CROLAB, 21.10.2015. do 24.10.2015., Zadar, Hrvatska.

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Official URL: http://bib.irb.hr/prikazi-rad?&rad=783299

Abstract

The objective of this paper is to describe a specific procedure for evaluation of calibration baths used at Laboratory for Process Measurement (LPM) for high precision comparison calibrations of thermometers. Over time, improvements in technology lead to increased accuracies of transfer standards for temperature measurements, such as standard platinum resistance thermometers. Therefore, the performances of the calibration baths and furnaces used for comparison calibration are becoming a limiting factor in a process of temperature scale dissemination. Since the time variation of metrological characteristics of temperature regulated zones (gradients, stability, and repeatability) adds a significant contribution to the total calibration uncertainty, precise and accurate evaluation of those characteristics is of very high importance. The method described in this paper was used for evaluation of characteristics of liquid bath with the equalizing block. The bath was filled with water, and its characteristics were tested in a temperature range from 20 °C to 80 °C. The results of the tests indicate that combined expanded uncertainties of the bath lie in the range between 4.3 mK and 10.7 mK.

Item Type: Conference or Workshop Item (Poster)
Keywords (Croatian): thermometry; calibration bath evaluation; thermometers; comparison calibration
Subjects: TECHNICAL SCIENCE > Mechanical Engineering
Divisions: 300 Department of Thermodynamics, Thermal and Process Engineering > 320 Chair of Thermal and Process Engineering
Indexed in Web of Science: No
Indexed in Current Contents: No
Date Deposited: 27 Feb 2017 16:53
Last Modified: 27 Feb 2017 16:53
URI: http://repozitorij.fsb.hr/id/eprint/7483

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