Gill Instruments Ltd
Intrinsically Safe WindObserver Anemometer
Page 35
Issue 10
Doc. No. 1360-PS-0001
May 2015
Therefore if the RWALONG number is 10 (default) and Averaged Data Output Period is
60 seconds, then the rolling averaged Direction and Magnitude data is calculated over
rolling 600 readings.
Whenever the unit is powered up then until the unit has reached its minimum long term
averaging interval the status code will read 51 (Measurement Average Building).
Gust Outputs
The Maximum Gust Direction is the direction of the maximum gust measured over the
short term output period. Gust is generated from a rolling 3s average of the short term
output period, and reset at the end of short term output period.
The maximum Gust Magnitude is the magnitude of the maximum gust measured over the
short term output period. Gust is generated from a rolling 3s average of the short term
output period, and reset at the end of short term output period.
The Gust value is derived from the highest average value based on 3 consecutive samples
within one average data output period. For example:
The G Command setting has no effect on Mode 15 Settings.
Two gust events are observed within one
average data output period. The first
produces an average value of 29m/s, the
second an average value of 27.33m/s.
The event with the highest average value
is the one that the WindObserver will
output, which in this case would be the
average value from the first event, even
though the peak gust was higher during
the second event.
