... 0~600V 2.Accuracy:0.01ohm,1V 3.Data memory:400sets 4.Data upload:RS232 ETCR3000 Digital Earth Ground ... and durable. Wire resistance verification, Data upload with RS232, Alarm function, Software monitoring, Data memory: 400 sets, Resistance range ... AC 600VRS232 InterfacePossess RS232 interface, software supervision, storage data can be uploaded to computer, preserved and printed.Communication ...