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14. TRANSMISSION RANGE
The transmission range of the radio signals between outdoor sensor and basis station
is up to 80m under optimum conditions.
(
However, the range values refer to the so-called "free field range".
However, this ideal arrangement (e.g. basis station and outdoor sensor on a plain,
even meadow without trees, houses etc.) never exists in practice.
Normally the basis station is set up in the house and the outdoor sensor, e.g. below a
car port or at the side of a window.
Due to the different influences on radio transmission, it is not possible to guarantee a
specific range.
However, trouble-free operation is usually possible in a detached house.
When the basis station doesn’t receive any data from the outdoor sensor (despite
new batteries), reduce the distance between the outdoor sensor and basis station,
change the installation site.
The range can sometimes be considerably reduced by:
—
walls/masonry, reinforced concrete ceilings
—
coated/metalised insulated glass, aluminium windows, etc
—
vehicles
—
trees, shrubbery, earth, rocks
—
proximity to metallic & conductive objects (e.g. heating elements)
—
proximity to human body
—
broadband interferences, e.g. in residential areas (DECT telephones, mobiles, radio-
controlled headphones, radio-controlled speakers, other radio-controlled weather
stations, baby phones etc.)
—
proximity to electric motors, transformers, mains adapters
—
proximity to mains sockets, mains cables
—
proximity to improperly shielded or uncovered operating computers or other
electric appliances
