New blackbody calibration source for low temperatures from -20 to +350 deg C

摘要

Calibration procedures for infrared thermometers and thermal imaging systems require radiation sources of precisely known radiation properties. In the physical absence of an ideal Planck's radiator, the German Committee "VDI/VDE-GMA FA 2.51, "Applied Radiation Thermometry", agreed upon desirable specifications and limiting parameters for a blackbody calibration source with a temperature range from -20 deg C to +350 deg C, a spectral range from 2 to 15 microns, an emissivity >0.999 and a useful source aperture of 60mm, among others. As a result of the subsequent design and development performed with the support of the laboratory "7.31 Thermometry" of the German national institute of natural and engineering sciences (PTB), the Mester ME20 Blackbody Calibration Source is presented. The ME20 meets or exceeds all of the specifications formulated by the VDI/VDE committee.