Anemometer

An ultrasonic anemometer underneath the rain gauge measures wind speed. Two pairs of orthogonally oriented transducers emit ultrasonic signals that bounce off a smooth reflective surface and back up to the opposite sensor. The ClimaVue 50 G2 calculates wind speed by measuring differences in the time it takes for sound to travel back and forth between the transducers. The wind measurement takes 42 milliseconds followed by 60 milliseconds of processing.

The ClimaVue 50 G2 measures the wind speed and direction every three seconds and records the instantaneous wind vector components. When queried, the ClimaVue 50 G2 outputs the average of the instantaneous measurements since the last query for wind speed and direction and the maximum instantaneous wind speed value for wind gust.

The ClimaVue 50 G2 keeps a running average of the last 10 measurements. If an instantaneous measurement is more than eight times the running average, the instantaneous measurement is rejected. It is not reported as the maximum gust or included in the data that is averaged over the output interval.