scope:

Object and scope

This guideline applies in the field of metrology, for providing guidance for the calibration and adjustment of radiation thermometers.

Radiation thermometry is a measuring method that finds applications in many industrial fields. Most instruments show a high repeatability, but especially in the lower temperature range (-50 °C to 300 °C), a traceable measuring accuracy for industrial instruments is difficult to achieve.

Based on recent co-operative developments between European national metrology institutes and industrial companies black-bodies and radiation thermometers were developed that allow noncontact calibration schemes for industrial radiation thermometers. Different to the traditional schemes, where the temperature and the emissivity of the reference radiation sources are measured, in such non-contact schemes no contact temperature measurement and in some special cases no emissivity measurement are necessary to calibrate an industrial radiation thermometer.