* Customer information file management: May input, edit, modify the information of resident area and meters; * Parameters setting: Remote set up concentrator form mater station include Loading the meter numbers, concentrator clock, reading period, relay parameter, start/stop reading parameter; * Reading meters: Concentrator acquire the data of meters through power line carrier; * Data storage: Concentrator has large quantity of memory to store meter data up to 31 times; * Relay function: Sense network structure, make sure each meter phase and their relative position to realize relay meter reading: * Frozen mode meter reading: Concentrator realize radio frozen meter reading according the preset of master station; * Remote monitoring: The master station can monitor and analyze the customer抯 meter operation; * Clock calibration: The system clock can be calibrated; * Print function: The system can create the reports and bills of meters automatically; * Data protection: The data can be stored for 10 years when power off.