A.V. Belinsky - Leading Engineer, FSUE Federal Scientific and Production Center Measuring System Research Insti-tute named after Yu.Ye. Sedakov, Nizhni Novgorod. E-mail: 1515niiis@rambler.ru Yu.V. Koltzov - Dr.Sc. (Eng.), FSUE Federal Scientific and Production Center Measuring System Research Institute named after Yu.Ye. Sedakov, Nizhni Novgorod. E-mail: koltzovyv@mail.ru