1. Introduction
The GVDA GD155 Digital Anemometer is a professional, handheld device designed for stable performance, safety, and reliability. It accurately measures wind speed, temperature, and humidity simultaneously. This versatile instrument is widely used across various fields including wind energy, meteorology, industry, agriculture, hydrology and water conservancy, environmental protection, and in applications related to highways, airports, and ports.
Its compact design and multi-functionality make it an essential tool for professionals and enthusiasts alike.
Figure 1: GVDA GD155 Digital Anemometer
2. Safety Information and Considerations
To ensure safe and proper operation of your GD155 Digital Anemometer, please observe the following precautions:
- Do not touch the fan blade with excessive force, as this may cause damage to the sensor.
- Avoid storing or operating the instrument in environments with high temperatures or high humidity.
- During use, prevent strong direct light from shining on the fan to avoid measurement errors.
- Protect the device from violent vibrations or impacts.
- For long-term storage, remove the batteries from the instrument to prevent leakage and damage.
3. Package Contents
Upon opening your GVDA GD155 Digital Anemometer package, please verify that all the following items are included:
- 1 x Digital Anemometer (GD155)
- 1 x User Manual
- 1 x Gift Box
- 1 x Carrying Bag
Figure 2: Package Contents (New Package)
4. Product Overview
Familiarize yourself with the components and controls of your GD155 Digital Anemometer:
Figure 3: GD155 Digital Anemometer Components
- Fan Blade: The eight-blade fan measures wind speed.
- Display: 2.4-inch HD LCD with backlight, showing wind speed, temperature, humidity, and various indicators.
- MAX/MIN/AVG Button: Cycles through maximum, minimum, and average values.
- Power Key: Turns the device on/off.
- Data Hold / Backlight Key: Short press to hold data, long press to toggle backlight.
- °C/°F Button: Selects temperature unit (Celsius or Fahrenheit).
- UNIT Button: Selects wind speed unit (m/s, km/h, mil/h, ft/m, ft/s, knots).
- Low Battery Symbol: Indicates when batteries need replacement.
- Automatic Shutdown Symbol: Indicates auto-off function is active.
- Wind Speed Simulation Bar: Visual representation of wind speed.
Video 1: Product demonstration showing power on, unit switching, and wind speed measurement.
5. Setup
5.1 Battery Installation
The GD155 Anemometer requires 3 x 1.5V AAA (LR03) batteries (not included). Follow these steps to install or replace batteries:
- When the low battery symbol () appears on the display, it's time to replace the batteries.
- Locate the battery cover on the back of the device. Unscrew and open the battery cover.
- Remove any old batteries from the battery compartment.
- Insert three new 1.5V AAA batteries, ensuring correct polarity (+ and -) as indicated inside the compartment.
- Reinstall the battery cover and fasten the screws to secure it.
Figure 4: Battery Compartment
6. Operating Instructions
6.1 Power On/Off
- Press the Power button to turn on the device.
- Press and hold the Power button again to turn off the device.
6.2 Wind Speed Measurement
To measure wind speed, temperature, and humidity:
- Turn on the anemometer using the Power button.
- Hold the anemometer so that the fan plane is aligned vertically with the direction of the airflow you wish to measure.
- The display will simultaneously show the wind speed, wind temperature, and relative humidity.
Figure 5: Wind Speed Measurement in action
6.3 Data Hold Function
To freeze the current reading on the display:
- Press the Data Hold / Backlight button (less than 1 second). The 'H' icon will appear on the display, indicating that the current reading is held.
- Press the Data Hold / Backlight button again (less than 1 second) to exit data hold mode and return to live measurement.
6.4 Backlight On/Off
To control the display backlight:
- Press and hold the Data Hold / Backlight button for more than 2 seconds to enable or disable the backlight function.
6.5 MAX/MIN/AVG Function
To view maximum, minimum, or average values:
- Press the MAX/MIN/AVG button (less than 1 second) to activate the maximum value display.
- Continue pressing the MAX/MIN/AVG button to cycle through maximum (MAX), minimum (MIN), and average (AVG) values.
- Press and hold the MAX/MIN/AVG button for more than 1 second to return to normal measurement mode.
6.6 Temperature Unit Selection
To change the temperature unit:
- Press the °C/°F button to switch between Celsius (°C) and Fahrenheit (°F).
6.7 Wind Speed Unit Selection
To change the wind speed unit:
- Press the UNIT button to cycle through the available wind speed units: meters per second (m/s), kilometers per hour (km/h), miles per hour (mil/h), feet per minute (ft/m), feet per second (ft/s), and knots.
Figure 6: Wind Speed Unit Selection
6.8 Auto Shutdown Function
The device features an automatic shutdown function to conserve battery life:
- By default, when the device is powered on, the auto-shutdown function is active. If no operation is performed for 10 minutes, the device will automatically power off.
- To cancel the auto-off function: Press and hold the Power button before turning on the meter. While holding, press the Power button to turn on the device. Release the Power button after the meter is on. The auto-off function will be canceled, and the auto-off symbol will not be displayed.
- To restore the auto-off function: Simply turn the power off and then on again. The auto-off function will be restored, and the auto-off symbol will reappear on the display.
Figure 7: Auto Power Off Feature
7. Maintenance
7.1 Battery Replacement
Refer to Section 5.1 for detailed instructions on battery replacement.
7.2 Cleaning
To maintain the instrument's condition and ensure accurate readings:
- Do not use corrosive agents or solvents to clean the instrument, as this may damage the casing.
- Regularly wipe the outer shell with a mild detergent or a damp cloth.
8. Troubleshooting
If you encounter issues with your GD155 Digital Anemometer, consider the following common troubleshooting steps:
- No Display/Power On: Check if the batteries are correctly installed and have sufficient charge. Replace them if necessary.
- Inaccurate Readings: Ensure the fan blade is clean and unobstructed. Verify that the anemometer is held correctly, with the fan facing the airflow. Avoid strong direct light on the fan.
- Display Freezes: Check if the Data Hold function is accidentally activated (indicated by 'H' on the display). Press the Data Hold button to deactivate it.
For persistent issues, please refer to the Warranty and Support section.
9. Specifications
| Feature | Specification |
|---|---|
| Display | LCD, Max display 9999, 2.4-inch Backlight LCD |
| Air Velocity Range | 0.70 ~ 30.00 m/s (1.50 ~ 67.10 mil/h, 2.30 ~ 98.50 ft/s, 137.0 ~ 5900 ft/m, 2.50 ~ 108.0 km/h, 1.30 ~ 58.30 knots) |
| Air Velocity Resolution | 0.01 m/s |
| Air Velocity Accuracy | < 1.00 m/s: ±0.7 m/s; 1.00 ~ 30.00 m/s: ±(2.0% + 0.5 m/s) |
| Temperature Range | -20.0°C ~ 60.0°C (-4.0°F ~ 140.0°F) |
| Temperature Resolution | 0.1°C/°F |
| Temperature Accuracy | 0.0 ~ 45.0°C: ±1.0°C; Others: ±1.5°C |
| Humidity Range | 0.0% ~ 99.9% RH |
| Humidity Resolution | 0.1% RH |
| Humidity Accuracy | 20% ~ 80% RH: ±5.0% RH; Others: ±6.0% RH |
| Sampling Rate | One reading per 0.5 Sec. |
| Sensor Type | Angled vane arms with bearing |
| Power Supply | 3 x 1.5V AAA (LR03) batteries |
| Operating Environment | Temperature: 0 ~ 40°C; Humidity: <80% RH; Altitude: <2000m |
| Storage Environment | Temperature: -10 ~ 50°C; Humidity: <80% RH |
| Auto Power Off | 10 minutes (default, can be disabled) |
| Product Dimensions | 142 x 58 x 26 mm |
| Package Weight | 220g |
| Certifications | CE, FCC |
10. User Tips
To get the most accurate and reliable readings from your GD155 Digital Anemometer, consider these tips:
- Optimal Positioning: Always ensure the fan blades are directly facing the airflow for the most accurate wind speed measurements.
- Environmental Stability: For temperature and humidity readings, allow the device a few moments to stabilize in the environment you are measuring.
- Battery Life: If you plan to store the anemometer for an extended period, remove the batteries to prevent potential damage from leakage.
- Display Readability: Utilize the backlight function in low-light conditions for better visibility of the LCD display.
11. Warranty and Support
For warranty information, technical support, or service inquiries regarding your GVDA GD155 Digital Anemometer, please contact the manufacturer or your point of purchase. Keep your purchase receipt as proof of purchase.
A digital version of this user manual is available for download. You can access the PDF version of the item guides and documents here.
