... portable digital fault recorder and analysis system which has been widely applied to power system Main Specifications system: Embedded LINUX operation system, memory: 256M, Hard ... (4 channels per group), one adapter for one group.2, 4 AC voltage input channels of: 130V,130V,130V,260V,3, 4 ... (4 channels per group), one adapter for one group.2, 4 AC voltage input channels of: 130V,130V,130V,260V,3, 4 ...