Spectrometer system and method for testing of same

A method for testing a spectrometer system, wherein the spectrometer system comprises a housing provided with a window, an illumination source, a spectrometer and at least one standard for internal recalibration being arranged in said housing, and wherein the method comprises the following steps:

• identifying specific absorption bands of a fill gas, present in the housing, in a reference spectrum recorded by the spectrometer using the standard following the calibration of the spectrometer system, with a wavelength characterizing the respective identified specific absorption band being measured in each case such that measurement values are obtained for the wavelengths of the identified specific absorption bands;
• recording a test spectrum with the spectrometer using the standard;
• identifying the specific absorption bands of the fill gas in the test spectrum, with a wavelength characterizing the respective identified specific absorption band being measured in each case, such that measurement values are obtained for the wavelengths of the identified specific absorption bands;
• and
• testing whether the measurement values of the wavelengths of the specific absorption bands of the fill gas identified in the test spectrum deviate by no more than a specified measure from the measurement values of the wavelengths of the specific absorption bands of the fill gas identified in the reference spectrum.