1st Power Supply Source
If you are planning to set up your sensors in an area not close to an AC outlet, some choices have to be made. Some units require an internal rechargeable battery that must be recharged to assure continual system function. If AC power is available a converter would be needed for DC power source. Another option would be solar panels attached to the same sensor mounting pole.
2nd Your Selected Site
Most all Professional Weather Station
s with external sensors require similar consideration as to site location. Your location site needs to be level and away from obstructions such as buildings, trees, and steep hills. A distance formula is used to calculate a site location when needed for such obstruction. A tree is 20 feet tall and the sensors are 5 feet tall, the difference being 15 feet, multiply 15 feet x 10(constant) = 150 feet the distance sensors should be from the tree. Roof mounting require the sensors to be 4-8 feet above the roof peak, which requires extensions and guy-wire kit. If a chimney or other roof projections or trees taller than the roof, use the distance formula as described. Do not install near chimney or on a mast with a television antenna. An earth ground is required, recommend a qualified electrician install and ground a roof mounted Weather Station.
3rd Communications Considerations
For Direct Communications, cable lengths have to be correct and grounding issues met. Outdoor cables may be subject to induced current due to lightning. Proper grounding is imperative to avoid damage to the Weather Station, computer, or any other device connected.
For Wireless Communications, line-of-sight and transmission range are the main concerns. The definition of line-of-sight is a straight path between a transmitting and receiving antenna that is not blocked by obstruction.
Test your radio transmissions, carry the sensor to the site attached to the tripod or mounting pole then attempt to communicate with the Weather Station using the host computer. If obstructions in the line of sight are preventing the sensors from communicating, try relocating your sensors away from obstructions or move the obstruction. Use a higher gain antenna at the computers site, on the roof of the building and align it above the obstructions.
Trees and foliage or metal siding and roofing will absorb or reflect RF energy and reduce the direct transmission range of a wireless system, while wood frame and brick buildings will have less of an effect. In many cases RF energy will find an indirect path by reflection from the Weather Station to the base location; although, over-the-horizon sites must use repeaters, or very tall antenna mast to create a clear line-of-sight.
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