1. Introduction
For optimal performance and safe operation, please read this instruction manual thoroughly before using the EARU DDS-668 Digital Single Phase Energy Meter. Keep this manual for future reference.
The DDS-668 is an instrument and equipment used to measure, record, display, and analyze parameters related to electric energy. It is widely applied in various stages of the power system, including power generation, transmission, distribution, and consumption.
2. Safety Information
WARNING
This product does not feature an explosion-proof structure and must not be used in flammable environments, such as those containing flammable gases, liquids, or explosives.
General Safety Precautions
- Please use this product in accordance with the instructions provided in this manual.
- Do not disassemble this product by yourself. Unauthorized disassembly may lead to electric shock, damage to the device, or void the warranty.
- Always pay attention to the rated voltage for use to prevent damage and ensure safety.
3. Specifications
The EARU DDS-668 energy meter is designed for single-phase electrical systems. Key specifications are detailed below:
| Parameter | Value |
|---|---|
| Model Number | DDS-668 |
| Dimensions (L*W*H) | 78*65*35mm |
| AC Voltage | 110V/230V |
| Rated Voltage | 230V |
| Output Voltage | 230V AC |
| Power Supply | AC |
| Phase | Single phase |
| Maximum Current | 80A |
| Max Operating Current | 50A - 79A |
| Measuring Energy Range | 99999.9 kWh |
| Pulse Frequency | 1000imp / kWh |
| Display Type | LCD with Backlight |
| Operating Temperature | -10~50℃ |
| Relative Humidity | No More than 95% |
| Installation | 35mm DIN rail |
| Battery Included | No |
| Certification | CE |
4. Setup and Installation
4.1 Mounting
The DDS-668 energy meter is designed for 35mm DIN rail installation. Ensure the DIN rail is securely mounted in a suitable enclosure or panel before attaching the meter.
4.2 Wiring
The meter supports two wiring modes for flexibility:
- Upper Input and Lower Output: Connect the Neutral (N) and Live (L) input wires to the top terminals labeled 'N OUT' and 'L OUT' respectively. Connect the load's Neutral (N) and Live (L) wires to the bottom terminals labeled 'N IN' and 'L IN' respectively.
- Lower Input and Upper Output: Connect the Neutral (N) and Live (L) input wires to the bottom terminals labeled 'N IN' and 'L IN' respectively. Connect the load's Neutral (N) and Live (L) wires to the top terminals labeled 'N OUT' and 'L OUT' respectively.
Always ensure power is disconnected before performing any wiring to prevent electric shock.
5. Operating Instructions
5.1 Display Functions
The meter features an LCD display with backlight that can show various electrical parameters. By manually pressing the button on the front panel, you can cycle through the following displays:
- Total Energy (kWh)
- Temporary Energy (kWh)
- Real Voltage (V)
- Real Current (A)
- Real Power (W)
- Frequency (Hz)
- Power Factor (PF)
5.2 Resetting Temporary kWh
The temporary Energy (kWh) reading can be reset to zero. To do this, press and hold the button on the front panel for 6 seconds. The total Energy (kWh) cannot be reset.
5.3 Display Cycling Demonstration
Video 1: Demonstration of cycling through display parameters by pressing the button.
6. Maintenance
The DDS-668 energy meter is designed for long-term, maintenance-free operation under normal conditions. To ensure its longevity and accuracy:
- Keep the meter clean and free from dust and moisture. Use a soft, dry cloth for cleaning.
- Avoid exposing the meter to extreme temperatures or direct sunlight for extended periods.
- Do not use abrasive cleaners or solvents on the meter's casing or display.
- Regularly check the wiring connections to ensure they are secure and free from corrosion.
7. Troubleshooting
If you encounter issues with your DDS-668 energy meter, consider the following basic troubleshooting steps:
- No Display/Power: Check the input power supply and wiring connections. Ensure the rated voltage is applied correctly.
- Inaccurate Readings: Verify that the wiring is correct according to the diagram. Ensure the load is within the meter's specified current range.
- Display Not Changing: Press the button firmly to cycle through the display modes. If the display is stuck, try power cycling the device (disconnect and reconnect power, if safe to do so).
- Meter Not Functioning After Installation: Double-check all wiring against the provided diagram. Ensure all connections are tight and correct.
If the problem persists after attempting these steps, please consult a qualified electrician or contact customer support.
8. User Tips
- Display Mode: While the meter cycles through various parameters, you can manually press the button to view specific readings like voltage, current, or power. The video demonstration shows how to do this.
- Single-Phase Use: This meter is designed for single-phase electrical systems (e.g., 110V or 220V AC). It is not intended for two-phase (e.g., two 110V lines) or three-phase connections. Attempting to connect it to incompatible systems may result in damage or inaccurate readings.
9. Warranty and Support
For detailed warranty information and customer support, please refer to the official user manual provided by the manufacturer. A PDF version of the user manual is available for download at the following link: EARU DDS-668 User Manual (PDF).
