Before start of information-control system is necessity of the analysis of working capacity of the primary processing algorithms such as checking of reliability and smoothing hindrances of the same frequency, as a useful signal. In this case, it is necessary to choose algorithms and smoothing parameters, which provide the required noise attenuation, when the process variable changes over time at a given speed. The program is developed for the analysis of the specified algorithms in package MATLAB with imitation of signals of the measuring instrument and the measurement channel, in which signals in the form of a impulse hindrance, breakage and short circuit are generated in a random way. Work of the pro ram mod le «Check of reliability» allows to find o t the specified infringement, to generate an authentic signal and to start smoothing modules. The analysis of algorithms for research has allowed us to establish relations between time intervals: result of researches was the choice of algorithm of smoothing on speed and quality of smoothing. Result of researches were recommendations for the chosen algorithm of smoothing according to demanded speed and quality of smoothing.