Vaisala WAA151 Installation Manual download pdf (Page 68)

Installation Manual __________________________________________________________________

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Figure 58 Siting the Station

Air Temperature and Relative Humidity

NOTE

The radiation shield is important in protecting the sensor from direct

sunlight and must always be used.

For mast installations, the height of the sensor should be set to 1.5 to 2

meters. In the northern hemisphere, the sensor should usually be

placed on the northern side of the tower. Avoid the following

installation sites to ensure correct measurements: shaded areas, steep

slopes, heat sources, swamps, high vegetation and places that might

hold water after rains.

Precipitation

Rain gauge is installed on the ground, on a base plate, or on a separate

stand near the MAWS enclosure.

The orifice of the gauge must be in a horizontal plane, open to the sky,

and above the level of in-splashing and snow accumulation. In

general, objects should not be closer to the gauge than a distance twice

their height above the gauge orifice.

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Vaisala WAA151 Installation Manual Page 68