Users Manual

Operating Manual Smart Weather Sensor
G. Lufft Mess- und Regeltechnik GmbH, Fellbach, Germany 19
6.8 Wind Speed
Sampling rate 1 sec / 10 sec (internal sampling frequency 15Hz)
Generation of average value 1 – 10 minutes
Generation of max/min value 1 – 10 minutes based on the internal 1 sec
measurements
Units m/s; km/h; mph; kts
Response threshold 0.3 m/s
Request channels:
UMB Channel
Measuring Range
act
min
max
avg
vct
Measurement Variable (float32)
min
max
unit
400
420
440
460
480
Wind Speed
0
75.0
m/s
405
425
445
465
485
Wind Speed
0
270.0
km/h
410
430
450
470
490
Wind Speed
0
167.8
mph
415
435
455
475
495
Wind Speed
0
145.8
kts
401
Wind Speed Fast
0
75.0
m/s
406
Wind Speed Fast
0
270.0
km/h
411
Wind Speed Fast
0
167.8
mph
416
Wind Speed Fast
0
145.8
kts
403
Wind Speed Standard Deviation *
0
75.0
m/s
413
Wind Speed Standard Deviation *
0
167.8
mph
Note: The second measurements are averaged over 10 seconds for the output of the current
(act) measurement. The 'fast' channels deliver every second a value.
6.9 Wind Direction
Sampling rate 1 sec / 10 sec (internal sampling frequency 15Hz)
Generation of average value 1 – 10 minutes
Generation of max/min value 1 – 10 minutes based on the internal 1 sec
measurements
Unit °
Response threshold 0.3 m/s
Request channels:
UMB Channel
Measuring Range
act
min
max
avg
vct
Measurement Variable (float32)
min
max
unit
500
520
540
580
Wind Direction
0
359.9
°
501
Wind Direction Fast
0
359.9
°
502
Wind Direction Corrected
0
359.9
°
503
Wind Dir. Standard Deviation *
0
359.0
°
Note: The second measurements are averaged over 10 seconds for the output of the current
(act) measurement. The 'fast' channels deliver every second a value.
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, especially 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.
*) Note: The evaluation of the standard deviation values will be activated after the first
request of a standard deviation channel. Please see p. 13.