DAVIS Vantage Pro2 ISS Installation Manual download pdf (Page 11)

Siting the ISS and Anemometer: General ISS Siting Guidelines:

Siting the ISS and Anemometer

For your weather station to perform at its best, use these guidelines to select the best

mounting locations for your ISS and anemometer. Be sure to take ease of access for

maintenance, sensor cable lengths and wireless transmission range into consideration

when siting your station.

General ISS Siting Guidelines:

• Place the ISS at least 5' (1.5 m) away from sources of heat such as chimneys and

exhaust vents.

• Avoid placing the ISS near or above any object or area that collects and radiates

heat in the sunshine. This includes any kind of paving, patio or deck, or metal or

concrete structures or objects.

• Ideally, place the ISS 5' (1.5 m) above the ground in a grassy area.

• Avoid locating the ISS in an area that is prone to precipitation runoff — look out for

trees and nearby buildings.

• If you have a wireless ISS, or if you have a solar radiation or UV sensor, look for a

location with good sun exposure throughout the day.

• Mount a Wireless ISS so that the solar panel receives the maximum amount of

sunshine available at that location.

• For Agricultural applications install the ISS and anemometer as a single unit 6.5’

(2 m) above the ground. This is especially important for evapotranspiration (ET)

calculations.

Anemometer Siting Guidelines

• Generally, the anemometer and ISS have different siting requirements and will

provide better readings when mounted apart from each other.

• For best results place the Anemometer above local objects that obstruct the wind

flow.

• If mounting on a roof, mount the anemometer at least 4' (1.2 m) and ideally 10’ (3

m) above the roof line.

• The standard for meteorological and aviation applications is to place the anemom-

eter 33 feet (10 m) above the ground.

Note: For roof mounting, and for ease of installation in other locations, we recommend using the optional

Mounting Tripod #7716.

Cable Length Considerations

• All Vantage Pro stations include a 40’ (12m) cable to go between the ISS and the

anemometer. This can be extended up to 540’ (165m) using optional cables. See

“Extending Wireless Transmission Range” on page 15

• The Cabled Vantage Pro includes a 100’ (30m) cable to go between the console

and the ISS. This can be extended up to 1000’ (300m) using optional cables.

Wireless Transmission Considerations

The range of the radio transmission depends on several factors. Try to position the trans-

mitter and the receiver as close as possible for best results.

• Typical maximum ranges:

• Line of sight: 400 feet (120 m)

• Under most conditions: 75 to 150 feet (23 to 46 m)

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DAVIS Vantage Pro2 ISS Installation Manual Page 11

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