BENETECH GT8911

Cover Page Information

The device is a BENETECH GT8911 Hot Wire Anemometer. It features a CE marking and a recycling symbol. The manual version is GT8911-EN-01.

A visual representation of the device shows a handheld digital anemometer with a dark grey body, a black probe attached to a handle, and a clear LCD screen displaying readings. The device has several buttons for operation.

Contents

• 1. Before Use Notice
• 2. Operation manual
• 3. Host and PC connection
• 4. Others

1. Before Use Notice

Check up

Thank you for purchasing the Hot Wire Anemometer. Carefully unpack your kit and ensure that you have the following items. In case that any item is missing or if you find any mismatch or damage, promptly contact your local dealer.

• Hot Wire Anemometer: 1PCS
• Probe: 1PCS
• USB Computer connecting cable: 1PCS
• English Instruction Manual: 1PCS
• PP Packing box: 1PCS

Introduction

The Hot Wire Anemometer is a professional instrument for the measurement of wind speed and temperature. It is designed for wind speed measurement in various environments, such as wind speed measurement engineering, quality control, and health control. It is applied in wind speed measurement for various occasions like factories, schools, offices, transportation routes, families, etc.

Functions

• Measure current wind speed, temperature.
• Measurement of current air volume, temperature.
• Measure wind speed/ MAX wind flow/min wind flow.
• 2/3 wind flow value/ average value.
• Wind speed/flow units and temperature units selection.
• Real-time measurement when connecting USB with computer software.
• Backlight and data holding (HOLD).
• Low battery indication.
• Powered by rechargeable lithium-ion batteries.
• Automatic shutdown setting.

Name of parts (Figure 1)

A diagram shows the anemometer and its probe. The numbered parts are:

• 1: button 1: MAX/AVG/MIN
• 2: button 2: confirm (ENTER), 2/3VMAX wind flow.
• 3: button 3: data holding (HOLD).
• 4: button 4: switch between wind velocity and wind flow.
• 5: button 5: Short press unit switch (UNIT) and long press to open or close key tone.
• 6: button 6: starting up, short press to turn on/off backlight, long press to shutdown.
• 7: button 7: short press °C/°F to switch temperature unit.
• 8: AREA/SAMPLE button: area setting (AREA), record time interval (SAMPLE), read recording number.
• 9: READ button: enter into read/save/record interface.
• 10: REC button: save one data or enter into data recording interface (REC).
• 11: DEL button: enter the data deleting interface.
• 12: USB interface.
• 13: LCD display.
• 14: Connector (align with joint hole during insertion [arrow pointing down]).
• 15: Connection line.
• 16: Slip resistant handle.
• 17: Probe.

LCD Displays

A diagram of the LCD screen shows various segments and icons. It displays units like m/s, km/h, ft/min, knots, mph, CFM, CMM, °C, °F. It also shows indicators for VEL, FLOW, MAX, AVG, MIN, HOLD, REC, READ, DEL, USB connection, and low battery.

Definitions:

• 1.2/3V: 2/3 of max wind flow.
• 2. MAX: Maximum value.
• 3. AVG: Average wind velocity/ wind flow.
• 4. MIN: Minimum value.
• 5. REDA: Read recorded data.
• 6. REC: Record data.
• 7. DEL: Delete recorded data.
• 8. &USB: USB connection.
• 9. [Low battery indicator]: Low battery indicator.
• 10. HOLD: Data holding.

Further display indicators include:

• 11. [Wind level]: Wind level.
• 12. Wind velocity unit: m/s, km/h, ft/min, knots, mph.
• 13. VEL: wind velocity.
• 14. X100: wind flow multiplier.
• 15. FLOW: wind flow measurement.
• 16. Wind velocity/flow value.
• 17. CFM: wind flow unit (cubic feet/minute).
• 18. CMM: wind flow unit (cubic meter/minute).
• 19. Wind temperature value/ vent area value.
• 20. °CM²: Indicating duct area in square meter in flow function, "°C" is used to indicate wind temperature in metric. °FT²: Indicating duct area in square feet when in flow function; "°F" is used to indicate wind temperature in metric.
• 21. NO DATA: no recorded data.

Specifications

1. Wind speed Range

2. Wind flow range

CFM: 0-999900 ft³/min

CMM: 0-999900m³/min

3. Unit Conversation

4. Wind Temperature:

2. Operation manual

Measurement of wind speed, temperature

• Before measurement: make sure to insert the connector plug of the fan auxiliary unit with the [arrow pointing down] mark downwards into the host socket. If the direction is wrong, the plug may be damaged.
• Press the ON button to turn on the instrument. After 1s of LCD full screen, wind speed and wind temperature are displayed, and VEL shows up on the screen.

A diagram shows the anemometer's LCD displaying "VEL" and temperature "27.6°C".

• Press the "UNIT" key, the wind flow unit changes among m/s, km/h, ft/min, knots, mph (default unit is m/s).
• Press the "°C/°F" key, the temperature changes between °C/°F mode (defaulted as °C).

Probe handling

Hold the probe with your hand, place the probe in the airflow with the air direction matching the direction of the arrows printed on the inner walls of the probe (please do not extrude the Probe, which may cause the inaccuracy measurement).

A diagram illustrates holding the probe in airflow, matching the air direction with arrows on the probe.

• 1). Wait for 2 seconds with the unit is ready for use.
• 2). Place the probe in the same direction of the wind to capture the accurate data, temperature within 20℃.
• 3). The dynamic indicator bar of wind speed will increase gradually as wind speed increases.

Wind volume measurement

Press VEL/FLOW button to switch to FLOW mode and display wind volume.

Press UNIT button to switch wind volume unit, and area unit will also change with wind volume unit as CMM---M², CFM---FT².

Press AREA button to enter into area setting interface. "[Area symbol]" is displayed at the bottom left of the screen, and the spot for input flashes. At this time, the area of the tuyere can be input. You can complete the input by pressing ENTER button; for example, input 1.6, then long press ENTER button and the area value is set as 1.6. In the process of inputting area value, long press AREA button to cancel the current area setting.

A diagram shows the anemometer measuring airflow in a duct. The LCD displays show readings like "0.000 CMM" and "1.600 M²" for area. It also shows a bar icon that changes with wind speed/flow.

Wind Flow Calculate Formula: Flow = velocity *(Free Area)

Testing Wind velocity: The bar icon (showing on the middle of LCD) changes accordingly with wind Flow/Velocity.

Note:

• a. Failing to enter the duct area leads to failure of measurement of the wind flow.
• b. If wind flow is larger than 9999, the LCD screen will show x10 or x100, indicating the measured value multiplied by x10 or x100.

Wind volume 2/3V MAX value measurement

In wind volume measurement interface, short press ENTER button to display 2/3 times of maximum wind volume value. At the same time, the screen will display 2/3VMAX icon, short press ENTER to exit.

A diagram shows the LCD displaying "2/3V MAX" and "FLOW" with a value.

Calculation formula of 2/3MAX wind volume: FLOW=2/3*MAX wind speed* tuyere area.

Measurement of maximum/average/minimum value

When measuring wind speed and volume, press the MAX/AVG/MIN button to measure the maximum, average and minimum values of wind speed and volume. At the same time, the screen will display MAX, AVG and MIN.

• MAX: The displayed wind speed or volume value is the maximum value measured since the wind speed or volume value is set as MAX.
• AVG: The displayed wind speed or volume value is the average value in the last 10s.
• MIN: The displayed wind speed or volume value is the minimum value measured since the wind speed or volume value is set as MIN.

Diagrams show LCD screen examples displaying "MAX", "AVG", and "MIN" indicators along with corresponding wind speed/flow values.

Data holding

During measurement of wind speed and volume, press "HOLD" button to lock the data, and then press "HOLD" button to release.

A diagram shows the LCD displaying "HOLD" and "VEL" with a value.

Data storage (TB: 960 data)

Record single datum:

• a. Under "VEL" state, press the "SAMPLE" button, input "0", and press "ENTER" button to confirm.
• b. Each time you press "REC" button, the data can be stored at a time. If data is full, the screen will display "FULL".

Continuously record data:

• a. Under "VEL" state, press "SAMPLE" button, input recording interval (0~9999 seconds), and long press "ENTER" button to confirm.
• b. Press "REC" button to enter into recording interface and start recording a sum of data continuously at the set recording interval. At this time, each time "ENTER" button is pressed, the recording interval and measured data will be displayed at the lower left of the screen; if the data is full, the screen will display "FULL" and then return to the normal measurement interface.
• c. Long press "REC" button to exit recording interface and stop recording; "REC" is no longer displayed.

A diagram shows the LCD displaying "REC" and "VEL" with a value.

Data reading

Under normal measurement interface, press "READ" button to enter reading interface of recorded data. The bottom left side will display the serial number of recorded data first and then the measured data. Every time you press “ENTER” button, the bottom left of the screen will display the serial number first and then the recorded value.

• Press "READ" button to view the record data of next serial number.
• Press "SAMPLE" button to input the serial number of recorded data to be viewed. After finishing input, long press “ENTER” to confirm, when the input serial number is bigger than the serial number of stored record, the recorded data with the largest serial number will be displayed.
• Long press "READ” button to exit data reading interface. The icon "READ" will no longer be displayed.

A diagram shows the LCD displaying "READ" and "VEL" with a value.

Data clearing

After pressing "DEL" button for 2s, "DEL" will be displayed on the upper right corner of the screen. When "CLR" is displayed on the center of the screen, the data of the instrument will be cleared.

A diagram shows the LCD displaying "CLR" and temperature.

Automatic shutdown

The instrument has automatic shutdown function, which will automatically shut down after 5 minutes of no button operation.

No automatic shutdown can also be set. Long press "Enter" button to start, the screen displays "no", and the instrument will not automatically shut down, so you need to manually turn it down. No automatic shutdown is only for the current time, and the instrument will return to automatic shutdown in the next time.

3. Host and PC connection

Software installation instructions

This product software is installed in English by default. After installation, you can switch among: English, Simplified Chinese, Traditional Chinese.

1). Computer configuration requirements:

• CPU: Pentium III 600MHz or above.
• A freely available USB connector.
• The screen resolution of screen should be at least 800*600 (or higher) with true color.
• At least 8MB of available memory space.
• At least 50MB of free disk space.
• Operating system: XP, Win7, Win10.

2). Install data acquisition software:

Enter the website www.benetechco.net in the browser, press enter and enter the page to find the menu "Support > Download center", as shown in Figure 2. Click into the page to find the software installation package "setup_Anemometer.zip", as shown in figure 3. Click the download button to directly extract the "zip package" after downloading. Double-click "setup_Anemometer.exe" icon to enter into program installation interface; choose between "Chinese or English" according to software installation prompt; click "OK" to the next step, as shown in Figure 4 below.

Figure 2 shows a webpage with "Support" and "Download center" links. Figure 3 highlights the "setup_Anemometer.zip" file. Figure 4 shows the language selection screen with options for Chinese and English.

3). Follow installation prompts:

Click "Next" for 2 consecutive steps until "Create a desktop shortcut" and "Create a Quick Launch shortcut" appear on the screen. Tick and click "Next", choose "Install" in the next prompt (do not click "Cancel"); wait for the progress bar to complete; click "Finish" directly to complete the installation, as shown in Figure 5 below.

Figure 5 shows the "Completing the Anemometer Setup Wizard" screen with a "Finish" button.

Remarks:

• Launch shortcut on user's desktop: right click "Anemometer" in Start\Programs\Anemometer, and send shortcut icon to desktop.
• If you want to delete the software, you can also select "Anemometer" in Start\Programs\Select, then select "Delete" icon.

Software interface instruction

Language switch step: Click the real-time measurement icon "[Real Time Measure icon]" to enter into measurement interface, select "Option" in menu bar, click the right triangle in "Language" to select language. As shown in Figure 6 below.

Toolbar: As shown in Figure 6 below (1) File, (2) Option, (3) Help.

Figure 6 shows the software interface with menu bar (File, Option, Help), a real-time measurement icon, and the button bar.

Button bar: as shown in Figure 6 below:

• (1) Start measurement
• (2) Pause
• (3) Import
• (4) Export
• (5) Configuration
• (6) Open
• (7) Save
• (8) Off - Real-time measurement
• (9) Empty
• (10) Exit

Display area: Switch wind speed and volume according to the instrument; the corresponding curve will be displayed in the display area (line chart); as shown in Figure 8 below.

Line chart: Figure 1 is wind speed / volume chart; Figure 2 is temperature and humidity chart; print button; measured data list.

Start page: as shown in Figure 7 below:

• (1) Real-time measurement "Real Time Measure": Enter real-time measurement interface.
• (2) Read storage of instrument "Device Storage": Read history record of instrument.
• (3) Erase storage of instrument "Erase Storage".

Figure 7 shows the software's start page with options for real-time measurement, device storage, and erase storage.

Note: As for Files, option, help, you can see details of corresponding multiple attributes by pointing cursor on the item.

Figure 8 displays the software's data interface, including line charts for wind speed/volume and temperature/humidity, along with a data list and print controls.

4. Others

Familiar trouble shooting

The following is a list of actions to be taken if the unit is not working properly:

• Screen is blank: Check the battery is inserted correctly. Open the battery door on the bottom rear of the unit. The [plus symbol] and [minus symbol] symbols on the battery should match the corresponding [plus symbol] and [minus symbol] symbols on the inside of the battery compartment.
• If the unit can not connect to PC normally: Please check the USB cable is OK. If the cable cannot be used formally, please replace for a new one.
• If the unit can not read the wind flow value properly: Please check if the vane is block or not.
• When the instrument cannot read the temperature or humidity data correctly: Please check if the connection wire between blade handle and the instrument is loose.
• If the unit can not read data properly: Please check if it is operated under the rule temperature and humidity situation.

Low battery power prompt and charging instructions

The instrument is powered by lithium-ion batteries, which can be charged through USB interface when power is low. During charging, the screen displays "USB" and a [flashing charging indicator] at the same time; if the [charging indicator] stops flashing and remains on the screen, it indicates that batteries are fully charged.

Note: When not connecting to PC, the unit will power off automatically after 5 minutes if no any operation after power on.

Maintenance & Warranty

1. Maintenance:

Replacing the battery and product maintenance:

• a. The instrument is powered by rechargeable lithium-ion batteries. Please charge batteries regularly to prevent them from being completely exhausted and damaged.
• b. After power on, if a [low battery warning symbol] appears on the LCD, indicating that you should replace the battery in order to avoid inaccurate measuring reading. Otherwise, the battery is very possible to leak, which will seriously damage the unit life.
• The battery compartment is on the down rear of the unit. Open the battery door, replace the old battery for a new battery (notice the battery polarity), close the battery door.

Cleaning the casing:

• Never use alcohol or thinner to clean the unit casing, which will especially erode the LCD surface; just clean the unit lightly as needed with little clean water.
• Never impact the unit or use on humidity condition.
• Do not store or use the unit in following locations where the unit may be subject to:
• a. Splashes of water or high levels of dust.
• b. Air with high salt or sulphur content.
• c. Air with other gases or chemical materials.
• d. High temperature or humidity or direct sunlight.

2. Warranty:

About relative warranties, please read the provided warranty card. BENETECH disclaims any liability due to: transportation damages; incorrect use or operation; manipulation, alterations or repair attempts; without warranty card, invoice.

Special Statement:

• a. Disposal of battery should be handled in accordance with local laws and regulations.
• b. BENETECH shall hold no any responsibility resulting from using output from this product as direct or indirect evidence.
• c. BENETECH reserves the right of changing the product design and contents of instruction if changed, without separate notice given.