A Good Practice Guide on measurement uncertainty for the calibration of Fibre Bragg Grating thermometers

This guidance document is an output of the 22IEM07 INFOTherm project (“IntegratedEuropean research, calibration and testing infrastructure for fibre-optic thermometry”).It serves as a foundational advisory document for calibration laboratories establishinguncertainty budgets for fibre-optic thermometers.Specifically, this guide addresses measurement systems consisting of a Fibre BraggGrating (FBG) sensor and an optical interrogation unit calibrated together as a singlesystem. The covered calibration range spans from 0 °C to 700 °C, at atmosphericpressure and in accordance with the International Temperature Scale of 1990 (ITS-90).Although the metrological principles outlined here may apply to other fibre-opticmeasurement configurations, those systems may introduce additional unique influencequantities and experimental considerations that are outside the scope of thisdocument.