First, an overview of the single-phase electronic multi-rate energy meter using advanced microcontroller processing system design is made with a simple circuit, high reliability, and low cost advantages. The product software, hardware, structural design technology is state-of-the-art, high precision measurement, combined with single-chip resources, to achieve energy hourly metering with infrared and RS-485 communication function, anti-interference, anti-attack performance, wide operating temperature range, long-term stability reliable operation. The product of the performance indicators meet the national GB / T 17215-2002 "Level 1 and 2 Static AC Active energy meter", GB / T 15284-2002 "multi-rate (time-sharing) energy meter special requirements, DL / T 645-1997 "multifunction energy meter communication protocol" standard technical requirements. Second, the main function (1) has a positive measurement, reverse active energy, negative energy accumulated positive energy, but the reverse energy still stored separately. Whether it is communication, time period to switch the positive and reverse active energy switching pulse cumulative accuracy is not affected. (2) the rate of four kinds (sharp, peak, flat, valley) 8 period setting, across zero period state is not affected by the break, power transmission and other harsh work environment and change. (3) electrical energy by sharp, peak, flat, valley and total power, reverse total, sharp peak, flat, valley electricity metering, storage. (4) 12-month freeze before the meter can store data, including a sharp peak, flat, valley. Electric energy data freeze date for each month 1-28 days of any time, the default of each month at 00:00 on the 1st. (5) Battery needle welding alternate green lithium battery, power, spare lithium batteries for at least a continuous built-in clock work properly for 10 years. (6) by infrared and RS-485 communication interface programming and meter reading operation. (7) the meter indicator of active energy and power pulse output. (8) the meter with LCD display, follow significant time, date, power and other parameters, and allows you to set through significant time and through the explicit content (specific situation, please refer to the Appendix). Electrical energy shows a median of six integer, a decimal. The default setting is significant, and each show time 5s. (9) the meter hardware clock circuit. Built-in clock with calendar chronograph automatic leap switching function; (10) after a power failure, all the stored data is not lost and can be maintained for 10 years or more. Repeated power off and power-on, power and pulse number will not change. (11) The event log function: the measurable maximum demand and time of occurrence; records the time of occurrence and the number of programming time and frequency, power failure occurred. (12) with blackouts display function, wide temperature range, wide-screen LCD. The clock detection output port (13), easy to regularly test the accuracy of the clock. Sales Hotline :0577 -6,298,677,113,757,772,139 Contact: Zhu micro