Engineering Physics Annotation << Back Calibration of the Hardware Function of the Thermal Radiation Spectrum Recorder of Gas-Thermal Particle Flow Using a Reference Thermal Emitter Jordan V.I., Kobelev D.I. The block diagrams of a thermal radiation spectrum recorder using an LR1 spectrometer and an automated complex for calibrating the spectrum recorder and a temperature reference incandescent lamp TRU 1100-2350 are presented. The thermal radiation spectra of the reference lamp recorded for various reference temperatures were used to calibrate the hardware function of the recorder of the thermal radiation spectrum of a gas-thermal particle fl ow, as well as to calibrate the correction function of the recorded spectra. Methodological features and calculation formulas that implement methods for recalibrating a temperature reference lamp and calibrating a spectrum recorder are outlined. Approximating polynomials were obtained for the correction function of the recorded spectra, which are necessary when solving the inverse problem of determining the temperature distribution of particles during gas-thermal spraying of coatings. Keywords: spectrometer, reference thermal emitter, hardware spectrum recorder function, correction function of recorded spectra, calibration technique. DOI: 10.25791/infi zik.4.2024.1396 Pp. 03-13.