User's Guide _______________________________________________________________________
26 ___________________________________________________________________ M211107EN-C
- The lines of sight of the sensors must not cross each other. See
Figure 3 on page 25 for details.
- The transmitter and receiver should face away from any obvious
source of contamination, such as spray from passing vehicles.
Excessive contamination is automatically detected by the sensor.
- There should be no bright flashing lights near the sensor or in
the receiver's field of view.
- If a Background Luminance Sensor is installed, it needs a clear
view of the sky in its preferred viewing direction (normally
North in the Northern hemisphere and South in the Southern
hemisphere; see section LM21 Background Luminance Sensor
on page 65).
3. Power supply and communication lines must be available.
- When siting the FS11P sensor, consideration must be given to
the available power supply and communication lines, as this
influences the amount of work and accessories needed, and
hence the actual cost of the installation.
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