The Personnel Grou Thing Tester PGT ® 120 controls the persons leakage resistance for wrist grounding and footwear grounding for access control of electrostatic protected areas (EPA's). The test result is visually and acoustically signalled. An additional potential free contact allows the connection of a door opener. Power supply is effected via a built-in battery or a plug-in power supply. Testing of wrist grounding, left and right shoe is due to separate the measuring circuits is possible at the same time. In connection with persons separation systems (e.g. hubs), the footwear measurement as series connection without pressing on the touch panel can be carried out (hands-free mode).This text is machine translated.