Calibration of measurement devices

Once per season, measurement devices are calibrated. This process is carried out by placing the four devices in the place where two weather stations from Madrid City Council are located. One of these locations is in Madrid (Arturo Soria street) and the other one is in Arganda del Rey. Our four devices register data during, at least, a week and these ones are compared with the data recovered by the weather stations from Madrid City Council; these comparisons are performed by UPM (Universidad Politécnica de Madrid) staff.