Solution for the measurement of the wind speed with an anemometer
Anemometer probes can be selected: thermal probe, impeller probe, pitot tube
Wind speed can be divided into three measurement areas: low wind speed 0 to 5m/s, medium wind speed 5 to 40m/s, high wind speed 40 to 100m/s
Pitot tube--mainly used in high temperature measurement
The pitot tube opening receives the total pressure and directs it to the force connection (a) in the pressure probe. Pure static pressure is charged into the side channel and directed to connection (b) in the pressure probe. The resulting differential pressure is the wind speed pressure (pressure related to dynamic flow) that is then analyzed and indicated. When using a thermal probe, a pitot tube is better suited than an impeller to respond to turbulence. Therefore, free inlet and outlet channels must also be ensured during pitot tube measurements
Pressure offset
Because the average void density of 1200g/m3 is used in the calculation, measurement errors often occur. When measuring air volume outside a window, the actual air density may deviate from the given average value by up to ±10%. Therefore, the inaccuracy of air volume may be up to ±5%. The testo 400 can compensate for this error by enabling automatic conversion of pitot pressure to wind speed. Multipoint average calculations can then be performed directly in these m/s values.
Anemometer Thermal Probe – Thermal anemometer is best suited for low wind speeds
Thermal probe measurement method is based on the principle of air cooling factor. An object is heated to a fixed temperature and then placed in a stream of air. by measurement
The amount of energy required to maintain the previous temperature is determined by clearly indicating the wind speed. The higher the wind speed, the more energy required to maintain a stable temperature.
The greater the amount. Thermal anemometers can be implemented using thermal bulb probes.
wind speed, the wind vane is used in the wind speed range, and the pitot tube achieves maximum accuracy at high wind speeds. Proper selection of the correct wind speed probe also depends on
at the application temperature. For example, thermal anemometers have only a limited operating temperature range.
It has high sensitivity and breaks easily when less energy is consumed. The stronger the ball, the harder it is to break, but more energy is required to maintain the temperature, which comes at the expense of battery life. This phenomenon can be observed during measurements in pipes. Depending on the design of the duct, turbulence can occur even at low wind speeds. Therefore, you should measure on the straight section of the pipe.
