DDSF732-L1 TYPE SINGLE-PHASE ELECTRONIC MULTI RATE POWER METER The DDSF732-L1 type single-phase meter is designed for measuring energy in household and commercial single-phase network services. It adopts the integrate circuit ADE7755 professionally used for measuring energy. The accuracy basically can't be affected by temperature, voltage, and high harmonics. After a piece of meter sold out from the factory, it did not need any adjustment thus significantly delay the inspection cycle. The meter's performance conform to IEC1036,IEC62052-11, IEC62053-21 and GB/T17215?002 Standard. MAIN FEATURE: Accurately measuring of positive, negative cumulative energy consumption. Set up one to four rates and eight using periods with user's requirement. Deposit current and last twelve months data of energy. Adopt LCD with wide temperature and wide visual angle.  Digits of the display pattern are six integers and one decimal. Display date, time, No. of the meter, etc relative assistant information Display current total energy consumption when power off and also have enquiry function by button. Hardware clock's CMOS chip has the function of temperature compensation function. Adopts long lifetime pole type lithium battery whose using lifetime is more than 10 years. Program the system with the function of preventing quick operation bring by fault of parts. Infrared and 485 communication function, support metering by shorten digits meter number. Average using lifetime can reach more than 10 years.