Report from interlaboratory comparison of air thermometer calibration procedures

Abstract

The interlaboratory comparison (ILC) was initiated in 2019 as an important first step in the EURAMET project 1459. The aim of the ILC was first and foremost to gain knowledge later used in developing guidelines for air thermometry, particularly within the realm of calibration and dissemination of the temperature scale. While the ILC protocol asked the participants to report a set of main data that followed a rather strict formular, they were also encouraged to perform different characterisation experiments and to explore different strategies for calibration. The idea was to have a set of common baseline data and analyse them in a traditional ILC framework, but at the same time gather exploratory data that could help advance the knowledge in air temperature metrology. The results were intended to be used as input to guidance documents for the calibration of thermometers for air temperature measurements, and possibly to some initial best practice guides for practical air thermometry in the field.