11
apart). The sensors should be within 10% (the accuracy is ± 5%). Allow about 30 minutes for
both sensors to stabilize.
4.Weather Station Installation
4.1
Pre Installation Check. Before installing your weather station in the permanent loca-
tion, we recommend operating the weather station for one week in a temporary location
with easy access.
This will allow you to check out all the functions, ensure proper operation,
and familiarize you with the weather station and calibration procedures. This will also allow
you to test the wireless range of the weather station.
4.2 Location Survey
Perform a site survey before installing the weather station. Consider the following:
1. You must clean the rain gauge once per year and change the batteries every one years.
Provide easy access to the weather station.
2. Avoid radiant heat transfer from buildings and structures. In general, install the sensor ar-
ray at least 5’ from any building, structure, ground, or roof top.
3. Avoid wind and rain obstructions. The rule of thumb is to install the sensor array at least
four times the distance of the height of the tallest obstruction. For example, if the building is
6m tall, install 4 x 6m = 24m away. Use common sense. If the weather station is installed next
to a tall building, the wind and rain will not be accurate.
4. Wireless Range. The radio communication between receiver and transmitter in an open field
can reach a distance of up to 100 m, providing there are no interfering obstacles such as build-
ings, trees, vehicles, high voltage lines. Wireless signals will not penetrate metal buildings.
Most applications will only reach 30m due to building obstructions, walls and interference.
5. Radio interference such as PCs, radios or TV sets can, in the worst case, entirely cut off ra-
dio communication. Please take this into consideration when choosing console or mounting
locations.
4.3 Best Practices for Wireless Communication
Wireless communication is susceptible to interference, distance, walls and metal barriers. We
recommend the following best practices for trouble free wireless communication.
1.
Electro-Magnetic Interference (EMI)
. Keep the console several feet away from computer
monitors and TVs.
2.
Radio Frequency Interference (RFI).
If you have other 433 MHz devices and communica-
tion is intermittent, try turning off these other devices for troubleshooting purposes. You may
need to relocate the transmitters or receivers to avoid intermittent communication.
3.
Line of Sight Rating.
This device is rated at 100 m line of sight (no interference, barriers or
walls) but typically you will get 30 m maximum under most real-world installations, which in-
clude passing through barriers or walls.
4.
Metal Barriers.
Radio frequency will not pass through metal barriers such as aluminum sid-
ing. If you have metal siding, align the remote and console through a window to get a clear line
of sight.
The following is a table of reception loss vs. the transmission medium. Each “wall”or obstruc-
tion decreases the transmission range by the factor shown below.
Medium
RF Signal Strength Reduction
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