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Computation of Calibration Angle for Electronic Wind Direction
Vane
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INPUT1
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AngleActual [degrees] =
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= current angle that the anemometer is
showing
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INPUT2
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AngleWished [degrees] =
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= current angle you wish the anemometer to show
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INPUT3
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BitOffsetOld [binary] =
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= current configuration value (first value in the
configuration string…usualy = 2)
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OUTPUT
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BitOffsetNew [binary] =
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= replace current configuration value with this calculated
value to obtain the desired angle(AngleWished)
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ORIGINAL CONFIGURATION VALUES as found in new anemometer
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2, 0, 0.45, -0.3, 193, 0.02848, 6.158, 0, 1000, 500, 12.8, 0,
0
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INSTRUCTIONS
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1. Mount the anemometer, then point the direction vane in a
specific direction and note the angle value showing in Atmo. This value will
go in field INPUT1.
2. Field INPUT2 will be the actual direction the vane was pointing when you
noted the angle value to go into INPUT1.
_____North = 0
_____East = 90
_____South = 180
_____West = 270
_____...any arbitrary angle will work
3. In Atmo 1.0 software
_____Click Setup
_____Open the Firmware Update Dialog
_____Select sensor whose wind direction vane you want to update A, B, C or
D
_____Click Get until you see similar values to the following:
___________2, 0, 0.45, -0.3, 193, 0.02848, 6.158, 0,
1000, 500, 12.8, 0, 0
_____The first value (in this case 2) is the wind vane calibration value
(DO NOT MODIFY ANY OTHER VALUES)
_____MAKE SURE the commas and periods do NOT get switched if your computer
uses commas to delineate decimal points
4. In INPUT3 field, input the 1st value of the number string obtained by
clicking Get (in this case 2).
5. The calculator should update the OUTPUT value with which you will
replace the first value in the number string. Replace the first value of the
number string (in this case 2) with
the calculated OUTPUT value.
6. Click Apply Correction and close the update firmware dialog and verify
the anemometer is showing the correct wind direction value.
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Copyright © 2011
www.baranidesign.com
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