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5.
The sensor must be accurately level for optimum performance. To check if the sensor is level, remove the lid and
check if the ball bearing inside is at the midpoint of the leveler. Additionally, a bubble level or carpenter's level
may be used.
6.
Attach the protective screen onto the top of the lid. The screen will prevent any debris entering the sensor.
Placement tips:
The rain sensor should be placed in an open area away from walls, fences, trees and other coverings which may
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either reduce the amount of rainfall into the sensor, deflect the entry of wind-blown rain, or create extra
precipitation runoff. Trees and rooftops may also be sources of pollen and debris.
To avoid rain shadow effects, place the sensor at a horizontal distance corresponding to two to four times the
-
height of any nearby obstruction.
It is important that rain excess can flow freely away from the sensor. Make sure that water does not collect at the
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base of the unit.
The rainfall measurement mechanism utilizes a magnet, hence do not place any magnetic objects around the
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proximity of the sensor.
2.2.3
Setting up the Anemometer (Solar cell wind sensor)
1.
Assemble the wind cups to the anemometer arm
2.
Attach the assembled anemometer to the base.
3.
Remove the 4 x screws on the battery compartment.
4.
To plug the re-chargeable battery (For Solar cell purpose) according to the polarities shown
5.
Insert 2 x UM-3 or "AA" size 1.5V batteries (For Backup purpose) into the battery holder in the base.
6.
Mount the anemometer onto a vertical surface, using the fittings provided.
7.
To allow the main console unit to find the direction which the wind vane is oriented, the following procedures are
required:
i.
Insert the re-chargeable battery and 2xUM-3 or "AA" size 1.5V batteries
ii.
Point the wind vane towards the north. Use a compass or map if necessary.
iii.
Use a pin to press the "SET" key which is in the battery compartment of the wind sensor.
Note: Above procedure must be repeated for changing battery.
The "SET" will toggle the direction between two mode:
1.
Let the wind direction as manufacturer design. It will be as a default setting after
2.
Set the current direction as NORTH.
8. Replace the battery compartment door and secure its screws.
Placement tips:
Check that wind can travel freely around the anemometer and is not distorted by nearby buildings, trees or other
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structures.
For better results, place the anemometer at least 3m above local structures and obstacles. The ground creates a
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frictional effect to wind flow and will attenuate readings.
Weather Station User Guide
Model: VENTUS W928-ULTIMATE
Version 3.0
Date 25.9.2008
Page 43 of 193
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