V.S. Sobolev - Dr.Sc. (Eng.), Professor, Chief Research Scientist, Institute of Automation and Electrometry, Siberian Branch of the Russian Academy of Sciences E-mail: sobolev@iae.nsk.su G.А. Kashcheeva - Research Scientist, Institute of Automation and Electrometry, Siberian Branch of the Russian Academy of Sciences F.А. Zhuravel - - Ph.D. (Eng.), Leading Engineer, Institute of Automation and Electrometry, Siberian Branch of the Russian Academy of Sciences