FIELD: measurement equipment.
SUBSTANCE: invention relates to the field of spectral measurements and relates to method of amplitude drift compensation in a spectrometer. The method includes performance of standardisation process, including measurement of standardisation sample spectrum and zero material amplitude spectrum, and calculation of a double-beam spectrum related to standardisation sample. The produced double-beam spectrum will be compared to predetermined desired spectral values, and mathematical transformation is formed to correct the measured data. The method also includes periodical performance of standardisation process during service life of the spectrometer, and production of reference single-beam zero material spectrum in the spectrometer. In the intervals between performance of standardisation procedures they measure zero material spectrum, and mathematical transformation is modified with the help of a function based on comparison of produced spectrum with reference zero material spectrum, and describing length of optical path via the sample holder.
EFFECT: increased accuracy of measurements.
4 cl, 1 dwg
