Operating Manual
Compact Weather Station
16
G. Lufft Mess- und Regeltechnik GmbH, Fellbach, Germany
6.10 Wind Measurement Quality
Sampling rate
10 seconds
Unit
%
Request channels:
UMB Channel
Measuring Range
act
min
max
avg
vct
Measurement Variable (float)
min
max
unit
805
Wind Value Quality
0
100
%
Note:
The value is updated every 10 seconds and transmits the minimum wind
measurement quality for the last minute.
This value allows the user to assess how well the measurement system is functioning in the
respective ambient conditions. In normal circumstances the value is 90 - 100%. Values up to
50% do not represent a general problem. If the value falls towards zero the measuring
system is reaching its limits.
If during critical ambient conditions the system is no longer able to conduct reliable
measurements, error value 55h (85d) is transmitted (device unable to execute valid
measurement due to ambient conditions).
6.11 Compass
(only device version 023 or higher)
Sampling rate:
5 min
Unit
°
Request channels:
UMB Channel
Measuring Range
act
min
max
avg
vct
Measurement Variable (float)
min
max
unit
510
Compass Heading
0
359
°
Note
: Reliable operation of the compass is only possible, if the sensor has been mounted
according to the instructions in this manual, i.e. on top of the pole. Should the sensor be
mounted on a traverse, the distribution of iron masses will be different from the situation
during factory calibration. This may lead to additional deviation of the bearing. This also
applies to lightning rods mounted at the pole top!
Dependent on the location of the installation the local declination of the earth magnetic field
has to be considered. The declination value is entered using the UMB-Config-Tool (see page
28). The declination for the installation location can be found in the Internet, e.g. at
http://www-app3.gfz-potsdam.de/Declinationcalc/declinationcalc.html
http://www.ngdc.noaa.gov/geomagmodels/Declination.jsp