... Power supply: 9~12V AC(use the transformer with the controller,primary voltage 220V±10%)O Operating environment: temperature -10C~ ... reset automaticallyG The meaning of the nixietube display:In normal, controller displays three phase average current(unit: A), press “SEL( ... “Fxx”, "xx” is two numbers, means parameter’s code.Press “ ∧ ”or“∨”for choosing parameter’s code, press “ ∧ ”“∨” at the same time ...