Chapter 4 _________________________ Installation of the Weather Station Components to the Mast
VAISALA _______________________________________________________________________ 97
0208-025
Figure 82 Correctly Aligned Ultrasonic Wind Sensor
a. Stand about 35 m to the south from the sensor with the
compass pointing to north.
b. Use the compass to determine that the ultrasonic wind
sensor's N-S transducer heads are exactly in line with the
compass. If not, move left or right until the N-S heads are
exactly in line with the compass. For the right position, see
Figure 82 above.
c. If the alignment is not correct, lower the mast.
d. Loosen the mounting clamp at the bottom of the sensor
adapter and rotate the sensor so that the heads marked with
"N" and "S" are aligned to north and south when the mast
is erected.
e. Tighten the mounting clamp.
f. Erect the mast to the vertical position and check the
alignment again until the sensor is correctly aligned with
the required accuracy.
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