1. Introduction
The Bonvoisin DY 45 Hot Wire Anemometer is a portable, high-precision instrument designed for measuring air velocity, airflow (CFM/CMM), and air temperature. It features an advanced 8-impeller probe with low-friction bearing technology for sensitive and accurate readings. Equipped with a backlit LCD display, a telescopic handle, and USB connectivity for data logging, this anemometer is suitable for a wide range of applications including HVAC system analysis, environmental testing, and various industrial and outdoor activities.
2. Safety Information
- Read all instructions carefully before operating the device.
- Do not expose the device to extreme temperatures, humidity, or direct sunlight.
- Avoid strong impacts or dropping the device.
- Keep the probe clean and free from obstructions to ensure accurate measurements.
- Do not attempt to disassemble or modify the device, as this will void the warranty and may cause damage.
- Use only specified batteries and dispose of them properly.
3. Product Overview
The Bonvoisin DY 45 Hot Wire Anemometer consists of a main unit with an LCD display and control buttons, and a telescopic probe connected via a cable. The probe is designed for precise air measurements.
Figure 3.1: Bonvoisin DY 45 Hot Wire Anemometer with key dimensions and measurement ranges.
3.1 Main Unit Features
- LCD Display: Shows measurement values, units, and various indicators.
- Control Buttons: For power, unit selection, data hold, backlight, and data logging.
- USB Port: For connecting to a computer for data transfer.
3.2 Telescopic Probe
The anemometer features an 8-impeller probe with a 108 cm (42.5 inch) telescopic handle and a 100 cm (39.4 inch) cable, allowing access to hard-to-reach areas. The probe tip can be bent for easier measurement positioning.
Figure 3.2: Telescopic probe in use for HVAC duct measurement.
Figure 3.3: Stable threaded connector for secure probe attachment.
4. Setup
4.1 Battery Installation
- Open the battery compartment cover on the back of the main unit.
- Insert the required batteries (typically 4x AA, refer to packaging) ensuring correct polarity.
- Close the battery compartment cover securely.
4.2 Probe Connection
- Carefully connect the probe cable to the designated port on the main unit.
- Ensure the connection is secure using the threaded connector to prevent accidental disconnection during use.
5. Operating Instructions
5.1 Power On/Off
- Press the POWER button to turn the device on.
- Press and hold the POWER button to turn the device off.
5.2 Measurement Modes (Wind Speed, Airflow, Temperature)
The anemometer measures wind speed, airflow (CFM/CMM), and air temperature simultaneously. The primary measurement will be displayed prominently on the LCD.
5.3 Unit Selection
To change measurement units:
- Air Velocity Units: Press the UNIT button to cycle through m/s, km/h, ft/min, knots, and mph.
- Airflow Units: Press the UNIT button to switch between CFM and CMM.
- Temperature Units: Press the °C/°F button to switch between Celsius and Fahrenheit.
Figure 5.1: Air velocity unit options.
Figure 5.2: Airflow unit options.
5.4 Data Hold, Max/Min, Average
- HOLD: Press the HOLD button to freeze the current reading on the display. Press again to release.
- MAX/MIN: Press the MAX/MIN button to view the maximum or minimum recorded values.
- The device also provides readings for wind chill, 2/3 maximum, and average wind speed/airflow. Refer to the on-screen indicators.
Figure 5.3: MAX and MIN indicators on the display.
5.5 Backlight and Auto Power Off
- Backlight: Press the LIGHT button to turn the backlight on/off. The backlight will automatically turn off after 7 seconds of inactivity to conserve power.
- Auto Power Off: The device will automatically power off after 10 minutes of inactivity to save battery life.
Figure 5.4: Backlit screen and auto power-off features.
Figure 5.5: Backlit LCD for clear readability in low light.
5.6 USB Connection and Data Logging
The anemometer can be connected to a PC (compatible with Windows 7, XP, 10) via USB for real-time online measurement and data recording. The included software allows for data analysis, export, and printing, supporting up to 500 data sets and graphical plotting.
Figure 5.6: USB connection for data output and analysis.
6. Maintenance
- Cleaning: Use a soft, dry cloth to clean the device. Do not use abrasive cleaners or solvents. Keep the probe free of dust and debris.
- Storage: When not in use for extended periods, remove the batteries and store the device in its protective case in a cool, dry place, away from direct sunlight and extreme temperatures.
- Probe Care: Handle the telescopic probe carefully to avoid bending or damaging the sensitive impellers.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Device does not power on | Low or dead batteries; Incorrect battery installation | Replace batteries; Check battery polarity |
| Inaccurate readings | Obstructed probe; Damaged probe; Device not calibrated | Clean probe; Contact support for probe replacement; Contact support for calibration |
| LCD display is dim or blank | Low batteries; Backlight off | Replace batteries; Press the LIGHT button to activate backlight |
| USB connection not working | Incorrect cable; Driver issue; Software not installed | Ensure correct USB cable; Install necessary drivers; Install provided software |
8. Specifications
| Feature | Detail |
|---|---|
| Brand | Bonvoisin |
| Model Number | DY 45 |
| Measurement Functions | Wind Speed, Airflow (CFM/CMM), Air Temperature |
| Wind Speed Units | m/s, km/h, ft/min, knots, mph |
| Airflow Units | CFM, CMM |
| Probe Type | Hot Wire, 8-impeller, telescopic (108 cm / 42.5 inch) |
| Display | Backlit LCD |
| Data Logging | Up to 500 sets, USB connection to PC (Windows 7, XP, 10) |
| Auto Power Off | 10 minutes of inactivity |
| Material | Plastic and Glass |
| Origin | China |
9. Warranty and Support
Bonvoisin products are designed for reliability and performance. For warranty information, technical support, or service inquiries, please refer to the contact details provided with your purchase or visit the official Bonvoisin website. Please have your model number (DY 45) and purchase date ready when contacting support.
Figure 9.1: Product certifications (CE/FCC/ROHS).