Vaisala WAA151 Installation Manual download pdf (Page 88)

Installation Manual __________________________________________________________________

86 ___________________________________________________________________ M010114en-B

The following numbers refer to Figure 74 on page 85:

1 Bird spikes

2 Sensor body

3 3/16 inch Hex-socket bolt

4 Adapter

5 Clamp

If the bird spikes are not sufficient to keep animals away from the

sensor arms, the sensor may also be mounted arms down. This

installation method requires the use of a sensor arm WAC425. The

sensor arm protects the cable connector from rain.

Below is the mounting procedure for the sensor arm.

1. Remove the hex-socket bolt, if still attached to the sensor body,

shown in Figure 74 on page 85 (use a 3/16-inch Allen key).

2. Pull the cable through the horizontal pipe of the sensor arm so

that the cable connector remains inside the vertical pipe.

3. Connect the cable to the sensor.

4. Attach the sensor to the vertical pipe of the sensor arm. Insert

the hex-socket bolt.

5. Use the clamps to attach the sensor arm to a 60 mm diameter

tube.

Wind direction alignment procedure

One transducer arm is permanently marked with "N " for north and a

second transducer arm is permanently marked with "S " for south.

NOTE

You might find the alignment procedure easier if you mark (e.g., with

paint or colored tape) the sensor body to indicate north and south so

that you can see it from the ground.

Complete the following steps to aim the wind sensor when using the

WAC425 sensor arm for mounting.

1. Use the compass to determine if the horizontal pipe of the sensor

arm is properly aligned to north and south. The sensor end

should face north.

2. If the alignment is not correct, lower the tower.

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Vaisala WAA151 Installation Manual Page 88