Model DDSF36 Electronic Single-Phase Multi-tariff watt-hour meter is used to measure 50Hz AC active energy and the power flow of peak time, flat time and off-peak time. Its functions comply with the corresponding technical requirements for the Class 1Single-phase Watt-hour Meter in IEC61036-2000, and its data communication protocols obey the IEC1107 standards.The features of this meter are: long service life, high accuracy class, high overload, low power consumption and small size. The meter adopts fault-tolerant technique to ensure calibration and correction of the data during usage. Its special techniques can ensure the data been memorized authomatically scroll the accumulative energy, accumulative energy of each tariff, present date and time, signal of present tariff, and so on, being stored automatically. You can set three tariffs and twelve periods in the meter. The power of real time clock chip is supplied with large capacity lithium battery to ensure the high accuracy of the time switch. And its standard infrared communication port finishes the function of setting, clock setting, tariff setting and period program. Etc. Function: Measuring Function Total Energy A. Measure total amount of forward active, reverse active energy and restore the data, which are indicated by LED B. The screen of LCD will display 'reverse' when power reverse. C. Measure reverse active energy separately Measuring multi-tariff in different time internals The meter has 4 kinds of tariff defined as sharp, peak, shoulder and off-peak. The meter can be programmed as single tariff, double tariff and three-tariff or four-tariff. During each tariff interval, the meter can measure forward/reverse active energy. Tariff and Time intervals The meter has 12 programmable interval tables, of which each can set up to 12 intervals assharp, peak, shoulder and off-peak during 24 hours. The minimum unit of each tariff interval can be set up as 1 minute. The meter can automatically switch calendar, time and leap year. Measuring real- time power Measure real-time power through pulse constant and pulse interval. The function of data-transfer The meter can transfer data automatically on the reading date( 1st to 27th are programmable ). That is the transfer of total forward/ reverse active energy.The meter can store the data in the previous 12 months and store the data for 10 years at power failing. Recording reverse energy The meter can record the total time of reverse energy and the last time period of reverse energy. Meter programming The meter can restore the times of programming and the latest programming time. Remote control function The meter has the function of remote control through RS-485. Electrical Features Model Accuracy Class Nominal Voltage Calibrated Current DDSF36 1.0,2.0 220V 1.5(6)A 2.5(10)A 5(20)A 5(30)A 10(40)A 10(50)A 10(60)A 20(80)A Technical parameters Nominal Frequency 50/60Hz Starting Current 0.004Ib Meter constant: 1600imp/kWh: 5(20)A,5(30)A, 10(40)A,10(50)A,10(60)A 3200imp/kWh: 1.5(6),2.5(10)A Weight : 0.65Kg Service Life: 10 years Size: 167.5 mm*95 mm*57 mm Power Consumption Voltage circuit<=1.0W 6VA Current circuit<=0.3VA LED Display: 5integers, 2 decimals Latent: There is anti-latent running logical circuit Environment temperature:-25'C~50'C Relative humidity no more than 85%