Clamp on ground resistance tester 1.Range:0.01-1200ohm,0.0mA-20A 2.Stored ... ,0.05mA 4.RS232 ETCR2100C+ Clamp on ground resistance tester . Introduction ETCR new Clamp Earth Resistance Tester is another perfect upgrade on old models. The ... .run.minisite.productShow(); oProductShow.init( { 'aImgSrc': aBigImageSrc } ); } )(); ETCR2100C+ Clamp on ground resistance tester ----ISO,CE,OEM,ODM.RS232 Interface