Transmission Range - Conrad TE 857 Operating Instructions Manual

17. Transmission Range

The transmission range for radio signals between temperature/humidity sensor and weather station (or second
receiver unit) is up to 100 m under best conditions; the range of rain sensor or wind sensor to weather station/second
receiver unit is up to 30 m.
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However, the range values refer to the so-called "free field range".
This ideal arrangement (e.g. weather station and outdoor sensor on a plain, even meadow without
trees, houses etc.) never exists in practice.
Normally, the weather station and second receiver unit are installed inside the house, the temperature/
humidity sensor next to a window and the rain or wind sensor on or at a garage.
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.
If the weather station or the second receiver unit does not receive any data from the outdoor sensors
(despite new batteries), reduce the distance between the outdoor sensors and the weather station/
second receiver unit , change the installation site.
The range can sometimes be considerably reduced by:
• Walls, reinforced concrete ceilings
• Coated/metallised insulated glass
• Vehicles
• Trees, brushes, earth, rocks
• The 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, power-supply units, computers
• Proximity to badly shielded or openly operated computers or other electric devices
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