6.2 Mast/Tube Mounting with base plate LRM3
Mount the base plate LRM3 directly onto the back side of the UDL 250 using the two supplied
M6 screws with washers. Then mount the mast in the desired direction onto the LRM3 with a
hose clamp.
6.3 Function Principle and Environmental Influences
The reader sends a high-frequent carrier signal. A transponder which is located within the
area of this transmitted carrier transmits the signal back with its own transponder data in a
modulated way. This very weak signal is being analyzed by the reader.
Because of the particular small-bandwidth and the high carrier frequency within MHz-
range this system is almost fail-safe. Nevertheless the range of the reader can be
negatively influenced. The following list shows what to pay attention to:
1.
The reader must have visual contact to the transponder.
There must not be any
walls or other devices between reader and transponder
. Reading
through plastic film, card board, papers or glass windows may be possible in some
cases, but will reduce the reading range depending on the condition of the
material.
2. Water, ice and snow will absorb the carrier signal.
Therefore the installer
should take care, that the front of the reader as well as the transponder can not be
covered with water, ice or snow.
3.
Reflexions within the surrounding of the reader can influence the reading result in a
negative way. Therefore the reader should be mounted as free-standing as
possible.
We strictly discourage from sunk-in installations.
V14/05/09
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Wiring and Installation UDL 250
