1. Introduction
The ASAIR AW3020A is a high-precision, wall-mounted network temperature and humidity transmitter designed for continuous environmental monitoring. It features a clear digital display for real-time readings and provides a standard 4-20mA current output for integration into control systems. This device is ideal for applications requiring accurate and reliable temperature and humidity data, such as HVAC systems, industrial processes, and environmental control in buildings.
2. Key Features
- Real-time Display: Large, easy-to-read digital LCD shows current temperature and humidity.
- High Precision: Accurate measurements with ±2%RH and ±0.3°C precision.
- Standard Output: 4-20mA current output for seamless integration with industrial control systems.
- Wall-Mounted Design: Convenient and secure installation on walls.
- Network Capability: Designed as a network transmitter for remote data access and control.
- Alarm Functionality: Equipped with sound and light alarm capabilities for critical condition alerts.
3. Specifications
| Parameter | Value |
|---|---|
| Model | AW3020A |
| Measurement Parameters | Temperature, Relative Humidity |
| Temperature Precision | ±0.3°C |
| Humidity Precision | ±2%RH |
| Output Signal | 4-20mA Current Type |
| Display | Digital LCD |
| Mounting | Wall-mounted |
| Alarm Function | Sound and Light Alarm |
| Power Supply | External DC Power (details not specified, typically 12-24V DC for 4-20mA transmitters) |
4. Package Contents
Upon unpacking, please verify that all items are present and in good condition:
- ASAIR AW3020A Temperature and Humidity Transmitter
- Mounting hardware (screws, wall anchors - may vary)
- This User Manual
Note: Power supply unit and connecting cables are typically sold separately.
5. Installation and Setup
5.1 Mounting Location
Choose a stable, flat wall surface for mounting. Ensure the location is representative of the environment to be monitored, away from direct sunlight, heat sources, air vents, or areas with stagnant air, which could affect measurement accuracy. The device is designed for indoor use.
5.2 Physical Installation
- Mark the desired mounting position on the wall.
- Drill holes for the mounting screws according to the device's back panel (refer to Figure 2 for the mounting hole location).
- Insert wall anchors if necessary.
- Secure the transmitter to the wall using appropriate screws.
5.3 Electrical Wiring
WARNING: Electrical wiring should only be performed by qualified personnel. Ensure power is disconnected before making any connections.
The AW3020A uses a 4-20mA current output. Connect the device to your control system or data logger as follows:
- Power Supply: Connect the external DC power supply (typically 12-24V DC) to the designated power input terminals. Observe correct polarity.
- 4-20mA Output: Connect the 4-20mA output terminals to the corresponding input on your receiving device (e.g., PLC, DCS, data acquisition system). Ensure proper loop impedance for accurate current measurement.
Note: Specific wiring diagrams are not provided in this manual. Please consult the detailed product datasheet or a professional electrician for precise wiring instructions based on your system.
5.4 Network Configuration
As a network transmitter, the AW3020A is designed for integration into a network. Specific network setup procedures (e.g., IP address configuration, communication protocols) are dependent on your network infrastructure and may require additional software or tools. Please refer to any supplementary network configuration guides provided by the manufacturer or consult your network administrator.
6. Operation
6.1 Power On
Once properly wired and mounted, apply power to the device. The LCD display will illuminate and begin showing real-time temperature and humidity readings after a brief initialization period.
6.2 Display Interpretation
The LCD shows:
- Temperature: Displayed in degrees Celsius (°C).
- Humidity: Displayed as a percentage of relative humidity (%).
- Alarm Indicators: Icons or specific segments may light up to indicate active alarms (sound and light).
6.3 Button Functions
The device features three control buttons (Menu, Up, Down, and a combined Enter/Back button). While specific menu structures are not detailed here, typical functions include:
- Menu Button (≡): Accesses the device's configuration menu.
- Up Button (▲): Navigates up through menu options or increases a value.
- Down Button (▼): Navigates down through menu options or decreases a value.
- Enter/Back Button (↵): Confirms a selection or returns to the previous menu/main display.
Use these buttons to set alarm thresholds, adjust display settings, or perform calibration if supported by the device's firmware.
7. Maintenance
7.1 Cleaning
To ensure optimal performance and longevity, keep the device clean. Use a soft, dry cloth to wipe the exterior. Do not use abrasive cleaners, solvents, or spray liquids directly onto the device, especially near the sensor elements or display.
7.2 Periodic Checks
Regularly inspect the device for any signs of damage, loose connections, or environmental factors that might affect its operation. Periodically verify the accuracy of readings against a known reference if high precision is critical for your application.
7.3 Calibration
While the AW3020A is factory-calibrated, long-term drift can occur with any sensor. If your application requires absolute precision over extended periods, consider periodic re-calibration. Refer to the device's menu options or contact technical support for calibration procedures.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No display/Device not powering on | No power, incorrect wiring, faulty power supply. | Check power connections and supply voltage. Ensure correct polarity. Test power supply. |
| Incorrect or erratic readings | Sensor obstruction, environmental interference, sensor damage, calibration drift. | Ensure sensor is clear. Relocate device away from interference. Check for physical damage. Consider re-calibration. |
| 4-20mA output not working | Incorrect wiring, faulty receiving device, loop impedance issues. | Verify wiring to receiving device. Check receiving device input. Ensure loop impedance is within specifications. |
| Network connection issues | Incorrect network settings, cable issues, network infrastructure problems. | Verify network cable connection. Check device's network settings (IP, subnet, gateway). Consult network administrator. |
| Alarm not triggering/false alarms | Incorrect alarm threshold settings, sensor issues. | Check and adjust alarm thresholds in the device menu. Verify sensor readings are accurate. |
9. User Tips
- For best accuracy, allow the device to stabilize for at least 30 minutes after power-up and installation before taking critical readings.
- Avoid placing the transmitter in direct airflow from heating or cooling systems, as this can cause localized readings that do not represent the general area.
- Ensure the area around the sensor is clear of obstructions to allow for proper air circulation.
- When integrating with a control system, always double-check the scaling of the 4-20mA signal to ensure correct interpretation of temperature and humidity values.
10. Warranty and Support
The ASAIR AW3020A is manufactured to high-quality standards. For specific warranty terms and conditions, please refer to the documentation provided at the time of purchase or contact your vendor. In case of technical issues or questions not covered in this manual, please reach out to the product seller or manufacturer's customer support for assistance.
