305DA/305DB/605DB/3010DBHigh PrecisionProgram ControlDC Power Supply SeriesEnglishINSTRUCTION MANUALStatement: The company reserves the right to improve and upgrade products,product specifications and design are subject to change without notice.Thank you for choosing this type of DC power supply. Please read the user guide thoroughlybefore using, and keep it in a safe place for future reference.