The paper deals with the problems of using of correlation and spectral functions apparatus for technical means of chronometry diagnosing as well as using of information technologies for automatization of finding, constructing and analyzing processes of correlation and spectral functions. The paper presents the main approaches to diagnosis of technical means of chronometry, the mechanical chronometer in particular, based on using the correlation and spectral functions apparatus, as well as using information technology to automate the processes of finding statistical characteristics. On the basis of existing methods and means of diagnostics analyzing the diagnostics method of technical means of chronometry is offered. It is based on working out the information models attached to certain defects of the mechanical chronometer.