Gill Instruments Ltd
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WindObserver 65
Page 35
Issue 4
Doc. No. 1390-PS-0039
June 2016
Notes
Non Heat Enabled Units.
If the unit is powered up and polled before the unit has reached its minimum averaging
interval the status code will read 51 (Measurement Average Building, non heat enabled
units only).
Heat Enabled Units.
On units where heat is enabled Code 51 will not be output if polled during the
measurement average building period, therefore allow for this period on power up before
taking readings to be fully averaged (maximum period of 10 minutes).
7.7.
Options
Speed of Sound (SOS) and Temperature
Either or both of these parameters can be selected or disabled
Note that neither of these parameters is available in Tunnel or NMEA formats.
SOS is useful for calculating air temperature with a rapid response. Sonic temperature is
derived from the SOS, based on an assumption of the composition of the atmosphere.
Humidity will affect the result.
True temperature can be calculated by:
T =
Ts
1+0.32 e/p
Where
T = True temperature (Kelvin)
Ts = Sonic temperature
e = Vapour pressure of water in air
p = absolute pressure of water in air
Heating (If fitted)
Heating is autonomous and requires no set-up once activated.
45
Offset
If required, the U axis can be 45
to the transducer axis.
Vertical Output Padding
A dummy W vector is inserted to provide compatibility with any WindMaster that may be
in a network.
