... digital earth resistance tester, with 2 pole, 3 pole, 4 pole to test earth resistance,soil resistivity,ac voltage SAT-10C Earth Tester is latest digital precision earth resistance tester of ... when performing misoperation, 6. International standard: ISO9001:2000Test item: Earth resistance Re by 2-pole, 3-pole and 4-pole Re ... and humidity-20~60°C, RH 90 soil resistivity Earth Resistance Tester