DDSY7999 Single -phase STS Key-pad Watt-hour KWH Meter
- Record the total currently consumed active positive energy, but the reversal energy is also to be added positively into total energy. No need of recalibration for long term.
- The key pad consists of the numbers from 0 to 9 plus Enter and Exit keys. A 30 ms' warning tone will sound when a key is pressed.
- Buzzer alarm, low-credit alarm.
- Hoarding proof, Over-load protection.
- Prepaid function. The user will get a bunch of 20-bit charging token from the power utility after they have purchased power from there. They need put the token into the meter by key pad.
- Expandable infra red and RS 485 communication.
- Clear and reliable LCD display.
- Adopts photoelectric-isolation energy pulse to output signals, which can be used to detect errors. The emitting diode indicates the energy consuming status.