Main functions
DDSY844 single-phase electronic prepaid Watt-hour meters must be paid by the user to buy cards in the input table, meter to the power supply, a card table, card non-GM, power automatic switch off after use, you will have to purchase and can continue to use electricity in the input table. In order to effectively resolve the tariff issue. Meanwhile, power purchase microcomputer management of information by the user, easily query, statistics, fees and print notes and so on.
The technical specifications of this product in accordance with GB/T17215-1998 of the level 1 and level 2 static AC active energy Watt-hour meter and GB/T18460-2001 of the prepaid electricity meter technical requirements. It uses the most advanced technology and SMT IC card technology, dual display, accurate metering, precision is stable, secure, reliable, complete, low power consumption, simple operation and so on.

Technical specifications
1, accuracy: level 1
2, and the current specification: 5 (20) a 5 (30) a 10 (40) a 15 (60) a
3, meter constants: 3200imp/kWh, 1600imp/kWh
4, reference voltage: 220V
5, reference frequency: 50Hz
6, operating voltage range: 220-20% VAC
7, power< 0.5W
8, environmental working conditions:-20 ℃ ~ + 55 ℃, relative humidity of not more than 85% (+ 25)
9, power outage data in the following table can be stored for 10 years, 100,000 or more IC card insert the card

Main features

Mechanical wheel and LED digital tube display, power failure or accidental failure, mechanical wheel still display, will not make the user disputes.
Remaining at 100 degrees show alarm, power failure alarm when the remaining 20 degrees, the second alarm functions unique to domestic (remaining power restore power supply when the card is user, you can continue to use, use auto power off).
Using data-vote error correction technology, each at five places, in case of an error in the data, the other around to correcting it, so as to be absolutely reliable, foolproof.
IC card meter internal components used in all industrial brand device, key parts of United States and Japan original chips such as metering IC AD7755, ensure the quality of component quality and the whole table.
Non-contact IC card meter uses patented technology, to transmit data wirelessly, completely solve the waterproof, moisture-proof, anti-attack challenges.