... Power supply: 9~12V AC(use the transformer with the controller,primary voltage 220V±10%)O Operating environment: temperature -10C~45C ... reset automaticallyG The meaning of the nixietube display:In normal, controller displays three phase average current(unit: A), press “SEL(6 ... alarm state.G How to set the parameter?The Micro-controller can change the parameter, in order to fit different needs ...