Banner EZ-ARRAY Lens Shields - Manual (Page 3)

EZSS Series Snap-On Lens Shields
P/N 127944 rev. B 3
Banner Engineering Corp. • Minneapolis, MN U.S.A.
www.bannerengineering.com • Tel: 763.544.3164
Adjacent Reflective Surfaces
Use of the EZSS series lens shield may increase the distance “d” shown in Figure 2
below. The surface of the shield may increase the potential angle of the beams from that
shown in the figure (without the shield in place). It is important to perform the trip test
with the lens shield in place. If the trip test indicates an optical short circuit, refer to
the EZ-SCREEN Instruction Manual, Section 3.1.6 for information on eliminating problem
reflections.
Maintenance
To prevent loss of excess gain, the shields should be cleaned when they become dirty.
Remove dirt and/or oil from the front face of the shield using a mild detergent or
window cleaner and a soft cloth. Avoid industrial cleaning agents or cleaning agents
containing alcohol, as they may damage the polycarbonate shield material.
Replacement
The shield should be replaced when it becomes pitted or scratched, or excess gain will
be decreased.
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 System. Perform the trip test, as
described in Section 3.4.4 of the EZ-SCREEN
Instruction Manual, to detect such reflection(s)
and the resultant optical short circuit.
Failure to prevent reflection problems will
result in incomplete guarding and could
result in serious bodily injury or death.
Do not position reflective surfaces
within the shaded area
Receiver with
lens shield
Emitter with
lens shield
d
d
For distance D, with lens shields:
Operating Range to 3 m (10'): d = 0.26 m (10")
Operating Range > 3 m (>10'): d = 0.0875 x R (m or ft)
Operating
Range (R)
Figure 2. Adjacent reflective surfaces