This universal testing set makes an examining of all preventive measures according to DIN VDE for 0100 possible part of 600 & appropriate international regulations such as International Electronical Commission 364-6-61. High precision & reliability possess the PROFESSIONAL TEST master series. The ergonomic overall concept is further supported by the easy-to-use soft-key buttons function selection ensured rotary switch, & a large illuminated display, which can be swivelled in a wide angle. The user software ETC enables the individual definition of auditing structures, & a standard-compliant documentation of results with an automated audit trail. For data exchange with PC a USB (Universal Serial Bus) & an RS-232 interface are available.