GAOTek Anemometer with Air Volume Wind Speed Meter (Portable)

Additional Information

Standard Accessories:

1. Main Unit
2. Carrying Case
3. Operation Manual
4. Sensor

Optional Accessories:

1. USB, RS-232 Data Cable with Software
2. Bluetooth Data Output With Software

Meter Descriptions

3-1 Display
3-2 Function key
3-3 Unit selection
3-4 Back light
3-5 Power button
3-6 Down/Read button
3-7 Up/Save button
3-8 Delete/Menu button
3-9 Max. Value hold
3-10 External power socket
3-11 RS232C socket
3-12 Vane probe

3-13 Max. Value indicator       3-19 Measurement reading
3-14 Parameter indicator        3-20 Browsing indicator
3-15 Temperature unit              3-21 Number of reading memorized
3-16 B. Scale unit                      3-22 Low battery indicator
3-17 Area unit                            3-23 Memory indicator
3-18 Speed and Flow unit

Operation
Turn on the meter using the Power Button before taking measurements.
Air Velocity Measurements

1. Select velocity function using the FUNCTION button. The LCD will display Speed when the velocity mode is selected.
2. Select the desired air velocity units using the UNIT button. The LCD will reflect the current unit selection (ft/min, km/h, m/s or knots).
3. Place the sensor in the air current with the yellow dot side of the vane facing the air flow
4. Air velocity will be displayed on the upper line of the LCD.

Air Flow Measurements (CMM / CFM)

1. Select flow function using the FUNCTION button. The LCD will display Flow when the flow mode is selected.
2. Select the desired air flow units using the UNIT button. The LCD will reflect the current unit selection (m³/ min, ft³/ min).
3. Airflow is based on the specific dimensions of the duct being measured. For the meter to correctly measure CMM (Cubic Meter per minute m³/ min) or CFM (Cubic Feet per minute ft³ / min), the user must input the area of the duct. Failing to input the correct area dimensions will result in erroneous readings.
4. To input the area dimension, just press and hold the DEL/MENU key long enough until ‘AREA’ showing on the display, then release it immediately. It takes about 8 seconds from depressing the DEL/MENU key.
5. The previously stored area value will be displayed on the LCD. Please use UP or DOWN key to change the area value to the correct area dimensions. The longer you press the UP or DOWN key, the larger the increment of the value changes. To quit, just press any key except the UP or DOWN key. This procedure can be carried out whenever required as each time the area of the duct is changed.
6. Place the vane in the air flow. Wait approximately 2 seconds for a stabilized Air Flow reading. The equation below is used to calculate Air Flow:
7. AIR FLOW = (AIR VELOCITY) x (AREA)

Beaufort scale Measurements

1. Select Beaufort scale function using the FUNCTION button. The LCD will display Scale when the flow mode is selected.
2. Place the sensor in the air current with the yellow dot side of the vane facing the air flow.
3. Beaufort force or scale will be displayed on the LCD.

Wave Height Measurements

1. Select Wave function using the FUNCTION button. The LCD will display Wave when the wave mode is selected.
2. Place the sensor in the air current with the yellow dot side of the vane facing the air flow
3. Probable Wave Height in the sea will be displayed on the LCD.

Air Temperature Measurement

1. Select Temp function using the FUNCTION button. The LCD will display Temp. when the temperature mode is selected.
2. Select the desired air Temp units using the UNIT button. The LCD will reflect the current unit selection (°F or °C).
3. Place the sensor in the air current.
4. The temperature will be displayed on the LCD.

Data Hold Feature

While taking measurements, press the MAX button to hold the Maximum reading. The max indicator will appear on the LCD when the display is in Maximum Data Hold mode. Press HOLD again to return to normal operation.

Storing and Recalling Readings

1. When in state, you can save the reading together with measuring conditions to the memory of the meter by pressing the UP/SAVE key. Then the icon changes to ‘M’ automatically while the number of memorized readings increases 1.
2. No matter in state or ‘M’ state, the memorized data can be browsed by depressing the READ key. The browsing state is marked in ‘R’ on display. When in ‘R’ state, all the readings memorized can be recalled by depressing the UP key or DOWN key.
3. To delete the memorized value in memory, just enter the browsing state and locate the reading to be deleted by the UP key or DOWN key, then depress the DEL key and release it immediately. If there is an “Err0” on the display, it indicates there is no reading to delete any more.

HOW TO SET THE TIME OF AUTO POWER OFF
The default setting for auto power off at the factory is 5 minutes. That means the meter will auto power off 5 minutes from the time of last key operation. Users can change it to any value between 1-9 minutes by following steps.

1. Just press and hold the DEL/MENU key long enough till ‘AUΓO ‘ showing on the display then release it immediately. It takes about 10 seconds from depressing the DEL/MENU key.
2. The previously set value will be displayed on the LCD. Please use UP or DOWN key to change the value to the correct time from 1 to 9 minutes as desired. To disable the function of auto power off, just preset the time to 0. That is, the meter can only be shut down manually in such a case.
3. To quit the setting, just press any key except the UP or DOWN key. This procedure can be carried out whenever required as each time to change the time of auto power off.

Battery Replacement

• When the battery voltage is less than approx. 5v, it is necessary to replace the batteries.
• Install the batteries 4×1.5v AAA (UM-4) correctly into the case.
• If the instrument is not to be used for any extended period, remove batteries.

Useful Equations and Conversions
Area equation for rectangular or square ducts

Area equation for circular ducts

Cubic Equations
CFM (ft3/min) = Air Velocity (ft/min) x Area (ft2)
CMM (m3/min) = Air Velocity (m/sec) x Area (m2) x 60

Unit of Measure Conversion Table

Beaufort scale and Probable Wave Height