Non contact IC card single-phase energy meter

◆ Instructions for use
　　The DDSY201 series single-phase electronic prepaid energy meter must be charged by the user to purchase a card and input it into the meter before the meter can supply power. One meter, one card, and the cards are not compatible with each other. After the power in the card is used up, it will automatically trip and cut off the power. The card must be used again to purchase power and input it into the meter before continuing to use it. Thus effectively solving the problem of difficult electricity collection fees. At the same time, users' electricity purchase information is managed by a microcomputer, making it easy to query, collect, charge, and print receipts.
The technical indicators of this product comply with the technical requirements of GB/T17215-1998 "Level 1 and Level 2 Static AC Active Energy Meters" and GB/T18460-2001 "Prepaid Energy Meters". It adopts the most advanced IC card technology and SMT process in China, with advantages such as dual display, accurate measurement, stable accuracy, secure confidentiality, reliable performance, complete functionality, low power consumption, and simple and convenient operation.

◆ Technical indicators
1. Accuracy level: 1.0 level
2. Current specification: 5 (20) A, 5 (30) A, 10 (40) A, 15 (60) A
3. Meter constants: 3200mmp/kwh, 1600imp/kwh
4. Reference voltage: 220V
5. Reference frequency: 50Hz
6. Working voltage range: 220 ± 20% VAC
7. Power consumption<0.5W
8. Environmental working conditions: -20 ℃ to+55 ℃, relative humidity not exceeding 85% (+25 ℃)
9. In the event of a power outage, the data in the table can be saved for 10 years, and the IC card has been inserted more than 100000 times.

Main features
1. The mechanical character wheel and LED digital tube have dual displays. In the event of a power outage or unexpected malfunction, the mechanical character wheel will still display and there will be no disputes with the user.
2. Display an alarm when there is a remaining 100 degrees, and a power-off alarm when there is a remaining 20 degrees. The secondary alarm function is unique in China (users can restore power after inserting a card to continue using the remaining battery, and automatically power off when it is used up).
3. Adopting data voting error correction technology, each data is stored in five places. If there is an error in the data, it can be corrected in four other places, thus achieving absolute reliability and foolproof.
4. All internal components of the IC card electric meter are made of industrial grade branded devices, and key components are made of original chips from the United States and Japan, such as the AD7755 metering chip, to ensure the quality of the devices and the overall meter quality.
5. The non-contact IC card meter adopts patented technology to transmit data wirelessly, completely solving the problems of waterproofing, moisture resistance, and attack prevention.