switel BCC 50 Bedienungsanleitung Seite 49

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Steel constructions, high−rise buildings or use in vehicles have a
negative effect on the range of operation.
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Try to communicate in areas with as few obstacles as possible.
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Move to a different location, if necessary.
5. Disturbance
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Transmitter and receiver are too close together. Ensure a
minimum distance of 1.5 m.
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