BENETECH GT8913 Digital Anemometer

1. Before Use Notice

Check up

✔️ Thank you for purchasing our Air Flow 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.

• Digital Anemometer
• Auxiliary Fan
• 1.5V AAA alkaline battery (4PCS)
• English Instruction Manual (1PCS)
• PP Packing box (1PCS)

2. Operation Manual

Introduction

The Digital multifunctional anemometer is a professional instrument for measurement of wind speed, temperature, and humidity. 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 and humidity.
• ??️? Measurement of current air volume, temperature and humidity.
• ? Measure wind speed/ MAX wind flow/min wind flow.
• ? 2/3 wind flow value/ average value.
• ⚙️ Wind speed/flow units and temperature units selection.
• ?? Backlight and data holding (HOLD).
• ? Low battery indication.
• ⚙️ Automatic shutdown setting.

Name of Parts (Figure 1)

Figure 1 shows the anemometer with numbered parts:

• 1: MAX/AVG/MIN button
• 2: ENTER button (for confirm and 2/3VMAX wind flow)
• 3: Data holding (HOLD) button
• 4: VEL/FLOW button (switch between wind velocity and wind flow)
• 5: UNIT button (short press for unit switch, long press to open/close key tone)
• 6: Backlight/Power button (short press for backlight, long press to shutdown)
• 7: °C/°F button (short press for temperature unit, long press for temperature/humidity switch)
• 8: AREA/SAMPLE button (area setting, record time interval, read recording number)
• 9: READ button (enter read/save/record interface)
• 10: REC/0 button (save datum or enter data recording interface)
• 11: DEL button (enter data deleting interface)
• 12: LCD display
• 13: Connector for the vane (align with joint hole during insertion)
• 14: Connection line
• 15: Slip resistant handle
• 16: Retractable drag rod
• 17: Six wind wheels (vane)

LCD Displays

The LCD display shows various indicators and values:

• Indicators: MAX, AVG, MIN, REC, HOLD, NO DATA.
• Units: VEL (m/s, km/h, ft/min, knots, mph), FLOW (CFM, CMM).
• Temperature Units: °C, °F.
• Humidity Unit: %RH.
• Other Indicators: Wind level indicator (123), Low battery indicator (?).

Specifications

1. Wind Velocity Range

2. Wind flow range

CFM: 0-999900 ft³/min

CMM: 0-999900m³/min

3. Unit Conversation

4. Wind Temperature:

(1) Temperature Range

(2) Humidity range

5. Operating Current:

6. Operation Conditions

7. Power supply

AAA 1.5V Alkaline battery *4

8. Dimensions:

Meter: 73x38x194mm

Vane: 74x35x2100mm (After lengthening)

9. Product Weight:

Host: 212.9g (without battery)

Attached machine: 180g

Measurement of wind speed, temperature and humidity

Before measurement: make sure to insert the connector plug of the fan auxiliary unit with the 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 display, wind speed and wind temperature are displayed, and VEL shows up on the screen.

Press the "UNIT" key to switch the wind flow unit among m/s, km/h, ft/min, knots, mph (default unit is m/s).

Press the "°C/°F" key to switch the temperature between °C/°F mode (defaulted as °C).

Long press the "°C/°F" button to switch to display of humidity.

Wind volume measurement

Hold the Anemometer with your hand, place the vane in the air flow with the air direction matching the direction of the arrows printed on the inner walls of the vane (do not extrude the fan leaf, which may cause inaccurate measurement).

Wait for 2 seconds for the unit to be ready. Place the probe in the duct area to measure current wind flow value. The dynamic indicator bar of wind speed will increase gradually as wind speed increases.

Press the VEL/FLOW button to switch to FLOW mode and display wind volume. Press the UNIT button to switch wind volume unit, and the area unit will also change accordingly (e.g., CMM to M², CFM to FT²).

Press the AREA button to enter the area setting interface. The "AREA" indicator will appear on the LCD. Input the area of the duct (tuyere). Press ENTER to confirm. For example, input 1.60, then long press ENTER to set the value as 1.600. Long press AREA button to cancel the current area setting.

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

Note:

• Failing to enter the duct area leads to failure of wind flow measurement.
• 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 the wind volume measurement interface, short press the ENTER button to display 2/3 times of the maximum wind volume value. The screen will display the 2/3VMAX icon. Short press ENTER to exit.

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. The screen will display MAX, AVG, and MIN accordingly.

• MAX: The displayed value is the maximum measured since the MAX mode was set.
• AVG: The displayed value is the average value over the last 10s.
• MIN: The displayed value is the minimum measured since the MIN mode was set.

Data holding

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

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 the "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 the recording interface and start recording data continuously at the set recording interval. Each time "ENTER" is pressed, the recording interval and measured data will be displayed. If data is full, the screen will display "FULL" and return to the normal measurement interface.

c. Long press "REC" button to exit the recording interface and stop recording; "REC" will no longer be displayed.

Data reading

Under normal measurement interface, press "READ" button to enter the reading interface of recorded data. The bottom left side will display the serial number of recorded data first, then the measured data. Pressing "ENTER" button cycles through serial number and recorded value.

Press "READ" button to view the record data of the next serial number.

Press "SAMPLE" button to input the serial number of recorded data to be viewed. After input, long press "ENTER" to confirm. If the input serial number exceeds the stored record, the data with the largest serial number will be displayed.

Long press "READ" button to exit data reading interface. The "READ" icon will no longer be displayed.

Data clearing

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

Automatic shutdown

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

Automatic shutdown can be disabled. Long press the "Enter" button to start; the screen displays "no", and the instrument will not automatically shut down. This setting is only for the current time; the instrument will return to automatic shutdown in the next session.

3. 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 "+" "-" symbols on the battery should match the corresponding "+" "-" 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 it with a new one.
• If the unit can not read the wind flow value properly: Please check if the vane is blocked or not.
• When the instrument cannot read the temperature or humidity data correctly: Please check if the connection wire between the blade handle and the instrument is loose.
• If the unit can not read data properly: Please check if it is operated under the correct temperature and humidity conditions.

Maintenance & Warranty

1. Maintenance:

Replacing the battery and product maintenance:

• a. Remove the battery from the unit if it is not required for extended periods of time in order to avoid damage to the battery compartment and the electrode resulting from a leaking battery.
• b. After power on, if a 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's life.
• The battery compartment is on the down rear of the unit. Open the battery door, replace the old battery with a new one (notice the battery polarity), and 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.

Storage conditions:

Never impact the unit or use it in humid conditions. Do not store or use the unit in locations where it 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. We disclaim 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. Our company shall hold no responsibility resulting from using output from this product as direct or indirect evidence.
• c. This company reserves the right of changing the product design and contents of instruction if changed, without separate notice.