DDSF122 Electronic single-phase multi rate energy meterDetailed product description：

The DDSF122 fully electronic single-phase multi rate energy meter adopts advanced ultra-low power solid-state integration technology and SMT process design and manufacturing, and is used for supplying AC active energy in a single-phase power grid with a rated power of 50HZ for time-sharing metering. This meter adopts a dedicated integrated circuit for electric energy meters MCU、 Technologies such as non functional storage devices for permanently storing information and LED digital displays have enabled residents to use single-phase three rate time-sharing metering, RS485 serial data and far-infrared communication, preset, meter reading, and other functions. The information transmission between users and power supply department computers has been achieved through dedicated POS machines and PC serial data communication ports, which comply with the technical requirements of DL/T645, DL/T614, GB/T17215, and GB/T15284.

The main functional features of DDSF122 electronic single-phase multi rate energy meter are:
1. Time of use measurement: peak, off peak, and off peak rates, with electricity usage recorded for each of the 12 time periods.  
2. Meter reading date: set at a certain day and time, store the 3-month rate electricity and total electricity for 12 months.  
3. Wheel display function: Wheel display various data and self define various data and time for wheel display.  
4. Broadcast school time.  
5. Optocoupler pulse output.  
6. Supports infrared and RS485 communication methods.  
7. Communication protocol: DL/T645-1997 Multifunctional Energy Meter Communication Protocol
8. Communication baud rate: 1200bps, effective distance of infrared communication port not less than 4m
9. Clock accuracy: 0.5S/d.  
10. Battery: 3.6V1.2AH lithium battery, with a normal lifespan of over 15 years under normal use. (The cumulative power outage time within 15 years shall not exceed 3 years)
11. High precision, high overload, high reliability, low power consumption, small size, light weight, good structural performance
12. Adopting various hardware and software anti-interference measures to ensure reliable operation of the electricity meter

Main technical parameters of DDSF122 electronic single-phase multi rate energy meter:

model	DDSF122
standard	DL/T614-1997，GB/T15284-2002，GB/T17215-2002
Precision level	Level 1.0
power consumption	＜1W,2VA
rated voltage	220V
rated current	2(10)A,5(20)A,5(30)A,10(40)A,10(60)A,20(100)A
Working voltage range	0.8Un～1.2Un, Extreme working voltage range: 0.7Un~1.3Un
Clock error	≤ 0.5s/d, Warm compensation
Working environment temperature	Working temperature (℃): -25~+60, extreme working temperature (℃): -40~+70
Working environment humidity	≤85%

DDSF122 electronic single-phase multi rate energy meter