Usage and purpose of anemometer
1. Before use, observe whether the pointer of the meter points to zero. If there is any deviation, gently adjust the mechanical adjustment screw of the meter to return the pointer to zero;
2. Place the calibration switch in the off position
3. Insert the plug of the measuring rod into the socket, place the measuring rod vertically upwards, press the plug tightly to seal the probe, place the "calibration switch" in the full degree position, and slowly adjust the "full degree adjustment" knob to make the meter pointer point at the full degree position;
4. Place the "calibration switch" in the "zero position" and slowly adjust the "coarse adjustment" and "fine adjustment" knobs to make the meter pointer point at the zero position
5. After the above steps, gently pull the plug to expose the probe of the measuring rod (length can be selected according to needs), and make the red dot on the probe face the wind direction. Based on the reading of the electricity meter, refer to the calibration curve to find the measured wind speed;
After measuring several points (about 10 minutes), the above steps 3 and 4 must be repeated once to standardize the current inside the instrument
7. After the measurement is completed, the "calibration switch" should be placed in the off position.
An anemometer is a speed measuring instrument that converts flow velocity signals into electrical signals, and can also measure fluid temperature or density. The principle is to place a thin metal wire heated by electricity in the airflow, and the heat dissipation in the airflow is related to the flow rate. The heat dissipation causes temperature changes and resistance changes, and the flow rate signal is converted into an electrical signal.
Anemometer Usage
1. Measure the speed and direction of average flow.
2. Measure the pulsation velocity and its spectrum of the incoming flow.
3. Measure the Reynolds stress in turbulence and the velocity and time correlations between two points.
4. Measure the wall shear stress (usually using a hot film probe placed flush with the wall, similar to the principle of velocity measurement).
5. Measure the fluid temperature (by measuring the variation curve of the probe resistance with the fluid temperature in advance, and then determining the temperature based on the measured probe resistance).
