Measurement WG DevWeek: Rotational Anemometer Calibrator 

First testing session of the DIY anemometer calibration rig. A battery powered datalogger is mounted in the centre of the spinning plank and the anemometer under calibration at one end. The RPM is measured using a reed switch mounted on the other end of the plank, triggered by a stationary magnet on the base.
Wind Empowerment's Measurement Working Group's (WG's) Datalogger Development Week took place near Toulouse, France, 20-15 April 2015.
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