TES3000® - Graphical User Interface TES3000® graphical user interface is designed on the latest internet technologies. Beside on-line measurement, the user can observe trend graphs and detailed information about the cooling system, on-load tap-changer and bushings. When a limit of a measured or calculated value is exceeded, alarms are given and logged in the event list. Copyright © 2001 Elpros d.o.o., All rights reserved.