Vaisala AWS330 - Manual (Page 71)

Chapter 4 _______________________________________________________________ Installation
VAISALA _______________________________________________________________________ 69
Installation Tips for Aligning Wind Sensors
If you have successfully installed Mast DKP210 so that it tilts exactly
toward west (in the northern hemisphere), you can align the wind sensor
correctly using a regular spirit level.
1. Tilt the mast (number 1 in Figure 31 below) and set it resting on the
tilting support (2).
2. Set the spirit level (4) on the WAC151 sensor arm (or on the two
lower transducer arms if installing Ultrasonic Wind Sensor
WMT703).
3. Check the level that the sensor assembly so that it is exactly
horizontal. Tighten the sensor support arm (or the FIX70 mounting
kit if installing WMT703) to the mast.
4. Lift the mast, and the wind sensor is aligned correctly toward north.
If you have not succeeded in installing the mast so that it tilts exactly to
the west, but it tilts, for example, 5° toward south-west, you can correct
the declination by applying the difference angle 5° to the horizontal level.
Use the appropriate angle meter to set the correct declination.
1012-212
Figure 31 Installing Wind Sensors
The following numbers refer to Figure 31 above:
1 = Mast
2 = Tilting
support
3 = Instrument (WA15)
4 = Spirit level