User manual for the DDZY178C single‑phase smart fee‑control electric meter, covering specifications, installation, operation, and warranty.
The DDZY178C is a single‑phase smart fee‑control electric meter designed for residential time‑of‑use billing. It complies with national standards such as GB/T 17215.321‑2008 and DL/T 645‑2007, offering functions like multi‑tariff measurement, event logging, remote communication, and pulse output.
The manual provides detailed specifications, wiring diagrams, LCD operation instructions, fault codes, hazardous substance information, warranty terms, and contact details for Dongfang Wisdom. It also describes communication interfaces (infrared, RS‑485, module) and configuration options such as tariff periods and ladder pricing. This manual is written in Chinese.
| Rated voltage | 220 V |
|---|---|
| Basic current | 1 A |
| Maximum current | 80 A |
| Accuracy class (active) | 1 |
| Weight | ≈1 kg |
| Battery voltage | 3.6 V |
| Battery capacity | ≥1200 mAh |
| Operating temperature range | -25 °C ~ +60 °C |
| Communication interfaces | Infrared, RS‑485, Module |
| Communication protocol | DL/T 645‑2007 |
Up to 14 tariff periods can be set in a day, with a minimum interval of 15 minutes.
The meter supports the DL/T 645‑2007 communication protocol.
The meter is covered by a twelve‑month warranty from the date of sale.
The built‑in clock has an accuracy of ≤ ±1 s per day within the temperature range -25 °C ~ +60 °C.