INSTALLATION
12
SAFERY LASER SCANNER
Light Interference
Reflecting surfaces located near the safety device may cause passive reflections. These
can affect the detection of an object inside the safety zone. The passive light sources
can be an incandescent lamp, sunlight, a fluorescent light, a strobe light or other infra-
red light sources (e.g. infrared laser).
Do not install the safety device near strong and/or flashing light sources.
Ambient light may interfere with the functioning device. If the installation requires
d
irect exposure to ambient light, the scanner must be positioned so that the light does
not enter the output window within ±5° of the detection plane.
NOTE
NOTE
NOTE
Figure 1 - Light interference avoidance
In all applications where strong light within ±5° of the detection plane can-
not be avoided, an additional distance must be applied to the Minimum
Safety Distance Calculations. This distance could be influenced by the
selected Dust Filter Level and the contemporary presence of reflecting
background on light source (e.g. halogen lamp with back reflector). Typi-
cally, an additional distance of 200 mm is enough to prevent any reduction
in the detection capability.
In any case where bright light is present outside the +/- 5 ° range, the
additional distance is still highly recommended.
In case of both light interference and high reflecting background, additional
distances are not summed, but the highest distance should be used.
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