1. הקדמה און איבערview
The BTMETER BT-866A Pro is a versatile handheld digital anemometer designed for precise measurement of various environmental parameters. This 5-in-1 device accurately measures wind speed, wind temperature, wind flow (CFM), relative humidity (%RH), and dew point. It is an essential tool for HVAC system balancing, environmental monitoring, outdoor activities, and industrial applications. The device features a large backlit display, data hold function, Max/Min measurement, and USB connectivity for PC data logging and analysis.
2. פּעקל אינהאַלט
ביים אויספּאַקן, ביטע באַשטעטיקן אַז אַלע זאכן וואָס זענען ליסטעד אונטן זענען פאַראַן און אין גוטן צושטאַנד:
- 1 x BTMETER BT-866A Pro Digital Anemometer
- 2 רענטגענ 1.5 וו אַאַאַ באַטעריז
- קסנומקס רענטגענ וסב קאַבלע
- 1 x PC Software CD
- 1 x האַנט רימען
- 1 x פּראַטעקטיוו טאַש
- 1 x באַניצער מאַנואַל

Figure 2.1: Contents included in the BTMETER BT-866A Pro Anemometer package.
3. פּראָדוקט פֿעיִקייטן און קאָמפּאָנענטן
The BT-866A Pro Anemometer integrates multiple measurement capabilities and user-friendly features:
- 5-אין-1 מעסטונג: Wind Speed, Wind Temperature, Wind Flow (CFM), Relative Humidity, and Dew Point.
- הויך פּינטלעכקייַט: Measures wind speed from 0.3 to 40 m/s with an accuracy of +/- 2.0% + 50.
- Sensitive Vanes: Equipped with 8 sensitive vanes for accurate low wind speed detection.
- Dual Wind Chill Sensor: For precise temperature readings.
- גרויסע באַקלייטעד LCD: 1.5-inch display for clear readings in various lighting conditions.
- דאַטן האַלטן: איינפֿרירט די איצטיקע לייענונג אויפן דיספּלעי.
- מאַקס/מינ מעסטונג: רעקאָרדירט מאַקסימום און מינימום ווערטן בעת אַ מעסטונג סעסיע.
- קייפל וניץ: Supports various units for wind speed (m/s, km/h, ft/min, knots, mph, fpm), temperature (°C, °F), and airflow (CFM, CMM).
- וסב קאַנעקטיוויטי: Allows connection to a PC for data logging, analysis, and monitoring.
- אָטאַמאַטיק מאַכט אַוועק: שפּאָרט באַטאַרייע לעבן דורך אויטאָמאַטיש אויסשליסן נאָך 10 מינוט פון אינאַקטיוויטעט.
- נידעריק באַטערי ינדיקאַטאָר: וואָרענונגען ווען באַטעריע פאַרבייַט איז דארף.
- Tripod Mount: Features a metal screw hole at the bottom for tripod attachment (tripod not included) for hands-free operation.

פיגורע 3.1: איבערview of the BTMETER BT-866A Pro Anemometer and its primary functions.

Figure 3.2: Key buttons and their functions on the BT-866A Pro Anemometer.
4. סעטאַפּ
4.1 באַטאַרייע ייַנמאָנטירונג
- געפינט דעם דעקל פונעם באַטעריע־אָפּטייל אויף דער הינטערשטער זייט פונעם אַפּאַראַט.
- עפֿנט דעם דעקל דורך אים צו שלעפּן אָדער אַראָפּשרויפֿן.
- אַרײַנשטעלן צוויי 1.5V AAA באַטעריעס, און זיכער מאַכן אַז די פּאָלאַריטעט איז ריכטיק (+/-).
- פאַרבייַטן די באַטאַרייע אָפּטייל דעקן סיקיורלי.
4.2 פּאַוערינג אויף / אַוועק
דריקן און האַלטן די ON/OFF button (usually the central red button) for approximately 3 seconds to turn the device on or off.
4.3 Initial Unit Selection
After powering on, you may select your preferred units for measurement. Refer to Section 5.2 for detailed instructions on unit selection.
4.4 Tripod Mounting (Optional)
For stable, hands-free measurements, the BT-866A Pro can be mounted on a standard tripod. Locate the metal screw hole at the bottom of the device and attach it to a compatible tripod. Ensure the device is securely fastened before use.

Figure 4.1: The BT-866A Pro Anemometer with optional tripod mounting.
5. אַפּערייטינג ינסטרוקטיאָנס
5.1 גרונטלעכע מעסטונג
Once powered on, the device will display real-time readings. Position the anemometer so that the wind flows directly through the 8-leaf wind wheel for accurate measurements. The display will show wind speed, temperature, and other selected parameters.
5.2 אַפּאַראַט סעלעקציע
דרוק די UNIT button to cycle through available units for wind speed (m/s, km/h, ft/min, knots, mph, fpm) and temperature (°C, °F). For airflow (CFM), the unit is typically displayed directly.
5.3 דאַטאַ האַלטן פֿונקציע
דרוק די HOLD/MODE button briefly to freeze the current reading on the display. Press it again to release the hold and resume real-time measurements.
5.4 Max/Min Measurement
דרוק די מאַקסימום / מין קנעפּל צו view the maximum or minimum recorded values during the current measurement session. Press repeatedly to cycle between MAX, MIN, and current readings.
5.5 Humidity Mode (Dew Point & Wet Bulb)
לאנג דריקן די HOLD/MODE button to switch to Humidity Mode, which displays Dew Point and Wet Bulb temperatures. Long press again to exit this mode.
5.6 FUNC קנעפּל
לאנג דריקן די FUNC button for 3 seconds to enable or disable the "Auto Power Off" feature. A short press of the FUNC button allows you to switch between different measurement modes (Wind Speed, Wind Flow, and input dimensions for CFM calculation).
5.7 CFM Measurement
The anemometer displays CFM values directly. For accurate CFM readings, ensure the device is positioned correctly within the airflow. If manual input for duct dimensions is required, use the FUNC button to access dimension settings.

Figure 5.1: CFM measurement display and measurement ranges.
6. Data Logging (USB PC Sync)
The BT-866A Pro supports data logging to a PC for detailed analysis and monitoring. This feature is particularly useful for long-term observation or when detailed reports are required.
- Install the provided PC software from the included CD onto your computer.
- Connect the anemometer to your PC using the supplied USB cable.
- Launch the PC software. The software will allow you to monitor and record wind speed, wind flow, CFM, humidity, and temperature data in real-time.
- The software can generate graphs and reports for comprehensive data analysis.

Figure 6.1: USB connection to PC for data logging and analysis.
7. Measurement Tips for Temperature and Relative Humidity
For accurate temperature and relative humidity (%RH) readings, consider the following:
- The temperature sensors are located within the left and right holes of the device.
- To ensure accurate readings, especially for temperature, shade the sensors from direct sunlight.
- Ensure there is adequate airflow across the sensors. Without sufficient airflow, temperature and %RH readings may change slowly or inaccurately reflect the ambient conditions. Allow time for the sensors to stabilize in the measurement environment.
8. ספּעסאַפאַקיישאַנז
| פּאַראַמעטער | ווערט |
|---|---|
| מאָדעל נומער | BT-866A |
| ווינט ספּיד ראַנגע | 0.3 ~ 40 עם / s |
| ווינט ספּיד אַקיעראַסי | +/- 2.0% + 50 |
| ווינט ספּיד וניץ | m/s, km/h, ft/min, knots, mph, fpm |
| טעמפּעראַטור ראַנגע | -22 ° F ~ 140 ° F (-30 ° C ~ 60 ° C) |
| טעמפּעראַטור וניץ | °C, °F |
| Air Flow (CFM) Range | 0 ~ 999900 ft³/min |
| קאָרעוו הומידיטי קייט | 0% ~ 100% רה |
| טוי פונקט מעסטונג | יא |
| ווייַז | 1.5-אינטש באַקלייטעד על-סי-די |
| מאַכט מקור | 2 רענטגענ 1.5 וו אַאַאַ באַטעריז |
| אָטאַמאַטיק מאַכט אַוועק | After 10 minutes of inactivity (configurable) |
| קאַנעקטיוויטי | USB for PC data logging |
| מאַטעריאַל | אַקרילאָניטרילע בוטאַדיענע סטירענע (אַבס) |
| דימענסיעס (L X W X H) | 8.64 X 3.81 X 16.51 סענטימעטער (3.4 X 1.5 X 6.5 אינטשעס) |
| וואָג | 200 גראַמז |
9. וישאַלט
Proper maintenance ensures the longevity and accuracy of your BTMETER BT-866A Pro Anemometer.
- רייניקונג: Use a soft, dry cloth to clean the device. Do not use abrasive cleaners or solvents. Keep the wind wheel and sensor areas free from dust and debris.
- סטאָרידזש: When not in use for extended periods, remove the batteries to prevent leakage. Store the device in its protective pouch in a cool, dry place, away from direct sunlight and extreme temperatures.
- באַטערי פאַרבייַט: Replace batteries promptly when the low battery indicator appears to ensure continuous accurate operation.
- סענסאָר זאָרגן: Avoid touching the wind wheel vanes or internal sensors directly. Handle the device with care to prevent damage to the sensitive components.
10. טראָובלעשאָאָטינג
If you encounter issues with your BT-866A Pro Anemometer, refer to the following common problems and solutions:
| פּראָבלעם | מעגלעך סיבה | לייזונג |
|---|---|---|
| די מיטל טוט נישט מאַכט אויף | נידעריגע אדער טויטע באַטעריעס; אומרעכטע באַטעריע אינסטאַלאַציע. | פאַרבייַטן באַטעריז מיט נייַ אָנעס, ינשורינג ריכטיק פּאָולעראַטי. |
| Inaccurate wind speed readings | Obstruction of wind wheel; incorrect positioning; damaged vanes. | Ensure wind wheel is clear and rotates freely. Position the device directly into the airflow. Check for physical damage. |
| נישט פּינקטלעכע טעמפּעראַטור/פֿײַכטקייט מעסטונגען | Sensors exposed to direct sunlight; insufficient airflow over sensors; sensors obstructed. | Shade the device from direct sunlight. Ensure adequate airflow around the sensor holes. Clear any obstructions. Allow time for readings to stabilize. |
| PC software not detecting device | USB cable not connected properly; software not installed correctly; driver issues. | Ensure USB cable is securely connected to both device and PC. Reinstall PC software and drivers if necessary. Try a different USB port. |
| דיספּליי איז טונקל אָדער פליקערנדיק | נידעריק באַטאַרייע. | פאַרבייַטן באַטעריז. |
11. וואָראַנטי און שטיצן
BTMETER products are manufactured to high-quality standards. This product is covered by a standard manufacturer's warranty against defects in materials and workmanship. For specific warranty details, please refer to the warranty card included with your product or contact BTMETER customer support.
If you require technical assistance, have questions about product operation, or need to report a defect, please contact BTMETER customer support through the official website or the contact information provided in your product packaging. Please have your model number (BT-866A Pro) and purchase details ready when contacting support.





