schmersal SLC 410 Instructions De Montage Et De Raccordement page 67

INSPECTION AND MAINTENANCE
VERIFICATION OF LIGHT CURTAIN / LIGHT GRID EFFICIENCY
Before each work shift or before switching on, check the correct operation of the
photoelectric light curtain / light grid.
Proceed as follows, intercepting the beams using the appropriate test object (available on
request).
The correct test object must be used for testing, depending on the light curtain / light
grid resolution.
Refer to Figure 29:
The SLC / SLG 410 RF light curtain / light grid does not require any specific maintenance
operations; however, periodic cleaning of the front protective surfaces of the Emitter and
Receiver optics is recommended.
Wipe using a clean, damp cloth; in particularly dusty environments, after cleaning the front
surface, the use of an anti-static spray is recommended.
Never use abrasive or corrosive products, solvents or alcohol, which could damage
parts. Do not use woollen cloths, that could electrify the front surface.
If the weak signal "d" letter appears on the Receiver display, check that:
–
–
If the LED stays on, contact SCHMERSAL.
Introduce the test object into the protected area and move it slowly, starting
from the top and moving down (or vice versa), first in the centre and then in the
vicinity of both the Emitter and the Receiver.
Multibeam models:
Intercept each beam with an opaque object, first in the center of the detection
zone and then close to the emitter and the receiver.
Make sure that during each stage of the test object's movements the red LED
on the Receiver is always on.
the front surfaces are clean;
the Emitter and Receiver are aligned correctly.
Figure 29
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