Weather Station Mounting Requirements - ABB VSN800 Product Manual

Take into account the needs for all attached sensors to determine the optimal mounting
location. Ambient air temperature and irradiance measurements can be affected by
obstructions, local topography, and surface type. Each site is different and presents unique
challenges. By far the most important consideration is obstruction.
Objects that are 10 degrees or more above the horizontal plane must not block irradiance.
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Ambient air temperature measurement should be placed away from any dark, heat-absorbing
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surface (asphalt, dark-colored surfaces) and should be no closer than 4 times the obstruction's
height.
A simple way to think of obstruction is the rule of 10. If the obstruction is at a distance
of at least 10 times its height above the weather station, you're good.
Towers can be used to raise the weather station above low-lying obstructions.

Weather station mounting requirements

Mount the support mast securely to a support structure. Mounting equipment is sold as an
accessory. The mast may also be attached to a support structure using U-Bolts. Do not tighten
the support structure to the unit, as directional orientation will be required.
Rotate the assembled unit until the electronics enclosure faces TRUE SOUTH or TRUE
NORTH if you are in the northern or southern hemisphere, respectively. Secure the support
mast to the assembly. Lining up the two holes in each mast prevents rotation. At this point the
entire unit should be secured to the support structure.
It is crucial that the device be oriented as precisely as possible. For the VSN800-14 version,
the wind direction measurement is directly related to this positioning.
Regardless of how you mount the system, the bottom of the electronic enclosure should not
extend more than 12" or less than 7" above the support of the mounting tube.
Other Mounting Considerations
The exact method of mounting the weather station is left to the installer. However, there are
some guidelines and recommendations to consider.
The environmental unit is designed to withstand very harsh weather conditions. Refer to the
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data for individual sensors for the ranges at which measurements remain accurate.
The environmental unit weighs approximately 7 lbs. Pole mounts in the ground or attached to
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structures that support up to 50 lbs. are recommended.
VSN800 Weather Station Product Manual
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