Operating Manual Compact Weather Station
10 G. Lufft Mess- und Regeltechnik GmbH, Fellbach, Germany
4.6 Air Density
The air density indicates how much mass in a given volume of air is contained and it is
calculated from the measured values of air temperature, humidity and air pressure.
4.7 Wind
The wind meter uses 4 ultrasound sensors which take cyclical measurements in all
directions. The resulting wind speed and direction are calculated from the measured run-time
sound differential.
4.8 Compass
The integrated electronical compass (only device version 023 or higher) can be used to
check the north – south adjustment of the sensor housing for wind direction measurement. It
is also used to calculate the compass corrected wind direction.
4.9 Heating
The precipitation sensor and wind meter are heated for operation in winter.
Note: the heating is designed for ambient temperatures down to -10°C, below -10°C the
function cannot be ensured under all conditions.
4.10 Global Radiation
The global radiation is measured by a pyranometer mounted in the top cover of the WS301
and WS501.
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