Vaisala WINDCAP WS425 Guide de l'utilisateur télécharger pdf (Page 35)

Chapter 3 _______________________________________________________________ Installation

VAISALA_______________________________________________________________________ 33

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Figure 12 Sketch of Magnetic Declination

Compass Alignment with Mast

Adapter

The following steps aim the wind sensor when using the 1-inch adapter

for mounting:

1. Use a compass to determine that the N-S transducer heads of the

ultrasonic wind sensor are exactly in line with the compass. Adjust

the heads by moving them to the left or right. For the correct

ground position of the installer, see Figure 14 on page 35.

2. If the alignment is not correct, lower the wind mast or tower.

3. Loosen the three set screws of the clamp at the bottom of the sensor

alignment adapter and rotate the sensor so that the heads marked

with the N and with the S are exactly aligned to north and south

when the tower is set up. Tighten the clamp screws.

NOTE

The source for the magnetic declination must be current as the

declination changes over time.

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Vaisala WINDCAP WS425 Guide de l'utilisateur Page 35