Adjacent reflective surfaces – Banner EZ-SCREEN Safety Light Curtain Systems User Manual
Page 19
Adjacent Reflective Surfaces
WARNING: Avoid Installation Near Reflective Surfaces
Avoid locating the defined area near a reflective surface; it could reflect sensing beam(s) around an object
or person within the defined area, and prevent its detection by the EZ-SCREEN Type 2.
Reflections will result in incomplete guarding and could result in an increased risk of harm.
A reflective surface located adjacent to the defined area may deflect one or more beams around an object in the defined area. In the
worst case, an optical short circuit may occur, allowing an object to pass undetected through the defined area.
This reflective surface may result from shiny surfaces or glossy paint on the machine, the workpiece, the work surface, the floor or the
walls. Beams deflected by reflective surfaces are discovered by performing the trip test and the periodic checkout procedures. To elimi-
nate problem reflections:
• If possible, relocate the sensors to move the beams away from the reflective surface(s), being careful to maintain adequate separa-
tion distance.
• Otherwise, if possible, paint, mask or roughen the shiny surface to reduce its reflectivity.
• Where these are not possible (as with a shiny workpiece), mount the sensors in such a way that the receiver's field of view and/or the
emitter's spread of light are restricted.
on page 32) to verify that these changes have eliminated the problem reflection(s). If the work-
piece is especially reflective and comes close to the defined area, perform the trip test with the workpiece in place.
d
d
d
Operating Range
(R)
Emitter
Receiver
Do not position reflective surfaces
within the shaded area
top view
side view
For 0.2 to 3 m (8" to 10') Operating range:
d = 0.26 m (10")
For Operating range > 3 m (> 10'):
d = 0.0875 x R (m or ft)
Figure 5. Adjacent reflective surfaces
EZ-SCREEN® Type 2 Light Screen Instruction Manual
122452 rev. B
www.bannerengineering.com - tel: 763-544-3164
19