1. Produto rematadoview
The BTMETER BT-846A is a professional HVAC anemometer designed for accurate measurement of wind velocity, air flow (CFM/CMM), and temperature. It features a separated, extendable wind sensor for flexible measurements and a large backlit LCD display for clear readings. This device is suitable for HVAC troubleshooting, air flow balancing, and various industrial or educational applications requiring precise air movement data.

Figure 1: BTMETER BT-846A Anemometer with its detachable vane sensor.
2. Contido do paquete
Before use, please verify that all items are present and in good condition. If any items are missing or damaged, contact customer support.
- 1 x BTMETER BT-846A Anemometer Main Unit
- 1 x Detachable Vane Sensor
- 1 x USB Cable (for sensor connection)
- 1 x batería de 9V
- 1 destornillador pequeno
- 1 x manual de instrucións
- 1 x Carrying Storage Case

Figure 2: Contents of the BTMETER BT-846A package.
3. Configuración
3.1 Instalación da batería
- Localice a tapa do compartimento da batería na parte traseira da unidade principal.
- Use the provided small screwdriver to unscrew the two screws securing the battery cover.
- Retire a tapa da batería.
- Connect the included 9V battery to the battery clips, ensuring correct polarity.
- Carefully place the battery into the compartment, ensuring the wires are not pinched.
- Replace the battery cover and secure it with the two screws.

Figura 3: Traseira view of the anemometer, showing the battery compartment and tripod mounting hole.
3.2 Connecting the Vane Sensor
- Locate the USB port on the side of the main unit, protected by a rubber cover.
- Carefully open the rubber cover.
- Connect the USB plug of the vane sensor cable into the USB port of the main unit.
- Garantir unha conexión segura.

Figure 4: Connecting the vane sensor to the main unit via the USB cable.
4. Instrucións de funcionamento
4.1 Encendido/apagado
Manteña premido o POTENCIA button (labeled with a circle and vertical line) to turn the device on or off. The device will automatically power off after 5 minutes of inactivity to conserve battery life.
4.2 Measuring Wind Velocity and Temperature
- Asegúrese de que o sensor de álabes estea conectado.
- Point the vane sensor into the air flow you wish to measure. The display will show real-time wind velocity and temperature readings.
- To change wind velocity units (m/s, km/h, ft/min, knots, mph), press the UNIDADE botón.
- To switch temperature units between Celsius (°C) and Fahrenheit (°F), press the ° C / ° F botón.

Figure 5: Measuring wind velocity and temperature with the anemometer.
4.3 Measuring Air Flow (CFM/CMM)
To measure air flow, you need to input the cross-sectional area of the duct or vent.
- Preme o VEL/FLOW button to enter CFM/CMM mode.
- Preme o UNIDADE button to select between FT² (for CFM) or M² (for CMM).
- Preme o SAMPLE AREA button to input the cross-sectional area. Use the arrow keys to adjust the value and OPCIÓN ENTER para confirmar.
- Once the area is set, the device will display the air volume in CFM or CMM.
Video 1: Demonstration of how to measure CFM on the BTMETER BT-846A.
4.4 Data Hold, Max/Min/Avg Readings
- Preme o ATENCIÓN botón para conxelar a lectura actual na pantalla. Prema de novo para soltala.
- Preme o MAX/MIN button to cycle through Maximum, Minimum, and Average wind velocity/flow readings.
4.5 Retroiluminación
Preme o LUZ button to turn the display backlight on or off. The backlight will automatically turn off after a short period to save battery life.
4.6 Data Recording and PC Connection
The device can record up to 600 groups of wind data. To utilize this feature and connect to a PC for real-time measurement or data download, use the provided USB cable and software (available via CD or download link).
- Preme REC to start/stop data recording.
- Preme LER a view datos rexistrados.
- Connect the main unit to your PC using the USB cable. Install the provided software to access recorded data and real-time measurements.
5. Mantemento
- Limpeza: Limpe o dispositivo cun pano suave e seco. Non empregue produtos de limpeza abrasivos nin disolventes.
- Almacenamento: Store the anemometer in its carrying case in a dry, cool environment when not in use for extended periods. Remove the battery if storing for a long time to prevent leakage.
- Substitución do sensor: The separated wind speed sensor can be replaced if it becomes damaged, extending the service life of the main unit. Contact customer support for replacement parts.
6 Solución de problemas
- O dispositivo non se acende: Check if the 9V battery is correctly installed and has sufficient charge. Replace if necessary.
- Lecturas inexactas: Ensure the vane sensor is clean and free from obstructions. Verify that the correct measurement units and cross-sectional area (for CFM/CMM) are selected.
- Problemas de visualización: If the display is blank or shows erratic readings, try replacing the battery. Ensure the sensor cable is securely connected.
- A retroiluminación apágase demasiado rápido: This is a design feature to conserve battery. Press the LIGHT button to reactivate the backlight.
- Problemas de conexión co PC: Ensure the USB cable is properly connected to both the anemometer and the computer. Verify that the software is correctly installed.
7. Especificacións
| Característica | Especificación |
|---|---|
| Marca | BTMETER |
| Número de modelo | BT-846A |
| Rango de velocidade do vento | 0.001~100 mph (0.3~45 m/s) |
| Wind Velocity Accuracy | ±3% ±0.2 reading |
| Wind Velocity Resolution | 0.001 m/s |
| Wind Flow Range (CFM) | 0-999900 pés³/min |
| Wind Flow Range (CMM) | 0-999900 m³/min |
| Área de fluxo de aire | 0.001-9999 ft² |
| Rango de temperatura | 32.0-113.0 °F (0-45 °C) |
| Precisión da temperatura | ±1 °C (±1.8 °F) |
| Resolución de temperatura | 0.1 °C/°F |
| Data Record Capacity | 600 grupos |
| Fonte de enerxía | 1 batería de 9 V (incluída) |
| Apagado automático | Despois de 5 minutos de inactividade |
| Dimensións (L x W x H) | 3.4 x 1.5 x 6.5 polgadas |
| Peso do elemento | 1.65 libras |
| Material | Acrilonitrilo Butadieno Estireno (ABS) |
8. Garantía e soporte
The BTMETER BT-846A Anemometer comes with a 12 meses de garantía for any quality problems. For technical support, warranty claims, or replacement parts, please contact BTMETER customer service through their official websitio web ou o vendedor onde se comprou o produto.