Operating Manual Compact Weather Station
G. Lufft Mess- und Regeltechnik GmbH, Fellbach, Germany 15
6.8 Wind Speed
Sampling rate 10 seconds
Generation of average value 1 – 10 minutes
Generation of maximum value 1 – 10 minutes based on the internal second
measurements
Units m/s; km/h; mph; kts
Response threshold 0.3 m/s
Request channels:
Measurement Variable (float)
Wind Speed Standard
Deviation
Wind Speed Standard
Deviation
Note: The second measurements are averaged over 10 seconds for the output of the current
measurement. The 'fast' channels deliver every second a current value, but with reduced
accuracy.
6.9 Wind Direction
Sampling rate 10 seconds
Generation of average value 1 – 10 minutes
Generation of maximum value 1 – 10 minutes based on the internal second
measurements
Unit °
Response threshold 0.3 m/s
Request channels:
Measurement Variable (float)
Wind Direction Standard
Deviation
Note: The second measurements are averaged over 10 seconds for the output of the current
measurement. The 'fast' channels deliver every second a current value, but with reduced
accuracy.
The minimum / maximum wind direction indicates the direction at which the minimum /
maximum wind speed was measured.
The corrected wind direction is calculated from the wind direction measured by the wind
sensor and the heading measured by the compass.
Optionally the compass correction of the wind direction can be activated for all wind direction
values. (Settings by UMB Config Tool)
Note: The correction function is designed for correction of the wind direction of a statically
mounted sensor. If the alignment of the sensor changes during the measurement (i.e. if the
sensor is mounted on a rotating platform or similar) the correction function will not in all
cases work properly, specially not for the vector average.
It is of course possible to use the correction function for mobile measurement units, where
the alignment is changed between measurement periods.
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