1. Introduction
The GasDog GD700 is a high-sensitivity fixed sulfur dioxide (SO2) gas detector designed for continuous monitoring of SO2 concentrations in various industrial and commercial environments. It features a 0-50ppm detection range, a standard 4-20mA signal output for integration with control systems, and an integrated sound and light alarm for immediate alert in case of gas leaks. This manual provides essential information for the safe and effective installation, operation, and maintenance of your GD700 gas detector.
Proper installation and regular maintenance are crucial for the accurate and reliable performance of the detector. Please read this manual thoroughly before installation and operation.
2. Safety Information
WARNING: Failure to follow these safety instructions could result in serious injury, property damage, or inaccurate readings.
- Installation and maintenance should only be performed by qualified personnel in accordance with local electrical codes and safety regulations.
- Ensure power is disconnected before performing any installation, wiring, or maintenance procedures.
- Do not modify the detector in any way. Unauthorized modifications will void the warranty and may compromise safety.
- The detector is designed for specific gas detection (SO2). Do not use it for detecting other gases.
- Regular calibration is essential to ensure the accuracy and reliability of the detector. Refer to the maintenance section for details.
- In case of an alarm, follow established safety protocols for the detected gas.
- Protect the detector from extreme temperatures, direct sunlight, excessive vibration, and corrosive substances.
3. Product Overview and Components
The GasDog GD700 detector consists of a robust housing, an integrated display, a high-sensitivity SO2 sensor, and a combined sound and light alarm unit.
Key Components:
- Display Screen: Provides real-time gas concentration readings, unit, and device status.
- SO2 Sensor: The core detection element, located at the bottom of the unit.
- Sound & Light Alarm: A red flashing light and audible siren activate upon gas detection exceeding set thresholds.
- Robust Housing: Designed for fixed installation and protection in industrial environments.
- Wiring Port: Located on the side for power and signal output connections.
4. Specifications
| Parameter | Value |
|---|---|
| Gas Detected | Sulfur Dioxide (SO2) |
| Detection Range | 0-50 ppm |
| Signal Output | 4-20 mA |
| Alarm Type | Sound & Light Alarm |
| Detector Type | Fixed Detector |
| Sensitivity | High |
| Model | GD700 |
| Manufacturer | GasDog |
| Operating Temperature | -10°C to 55°C (14°F to 131°F) |
| Operating Humidity | <95% RH (non-condensing) |
| Power Supply | DC 24V |
| Explosion-proof Grade | Exd II CT6 Gb |
5. Setup and Installation
Proper installation is critical for the detector's performance and safety. Consult with a qualified electrician or installation professional.
5.1 Choosing an Installation Location:
- Install the detector in an area where SO2 gas is most likely to accumulate. SO2 is heavier than air, so consider installing it closer to the floor or potential leak sources.
- Avoid locations with strong air currents (e.g., near ventilation outlets, windows, doors) that might dilute gas concentrations.
- Ensure the location is free from excessive vibration, direct heat sources, or corrosive chemicals.
- Allow sufficient space around the detector for maintenance and calibration.
5.2 Mounting the Detector:
- Use appropriate screws and anchors to securely mount the detector to a solid surface. The housing has mounting holes for this purpose.
- Ensure the detector is mounted vertically with the sensor pointing downwards for optimal performance and drainage.
5.3 Wiring Instructions:
- Disconnect all power before wiring.
- Connect the DC 24V power supply to the designated power terminals inside the wiring compartment. Observe polarity.
- Connect the 4-20mA signal output wires to your control system (PLC, DCS, etc.). Refer to your control system's manual for input wiring.
- Ensure all connections are secure and properly insulated.
- Use appropriate cable glands to maintain the explosion-proof integrity of the enclosure.
5.4 Initial Power-Up:
- After completing all wiring and mounting, apply power to the detector.
- The detector will undergo a self-test and warm-up period (typically a few minutes). During this time, the display may show a countdown or
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