... Wire resistance verification, Data upload with RS232, Alarm function, Software monitoring, Data memory: 400 sets, Resistance range: 0. ... ground: measuring below AC 600VRS232 InterfacePossess RS232 interface, software supervision, storage data can be uploaded to computer, ... RS232 Com-cable:1PC; Software disk:1PC; Tester bag:1PC . Field Application ETCR3000 Digital Earth Ground Resistance Meter Tester