When analyzing the elemental composition of the substance under study, the task is to determine the true intensity of the radiation lines. The error in determining the intensity is caused by errors in the spectrometer. Reducing the error can be achieved by taking into account (correcting) the errors, as well as reducing them. In this paper, we propose a method for reducing the measurement error by reducing the miscalculations with an acceptable deterioration in the energy resolution of the spectrometer. An algorithm for automatically setting the duration of the output signals of the spectrometric amplifier and the width of the differential discriminator window for amplitude analysis is presented.