VISION MXL
30
8540687 • 29/03/2010 • Rev.10
CHECKOUTS AND MAINTENANCE
VERIFICATION OF LIGHT CURTAIN EFFICIENCY
Before each work shift or just after switching on, check the correct operation of the
photoelectric light curtain.
Proceed as follows, intercepting the beams using the appropriate test object (available as
accessory, free of charge).
The correct test object must be used for testing, depending on the light curtain
resolution. See page 26 for the correct ordering code.
•
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.
•
2, 3, 4 beams 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.
Figure 26
The VISION MXL light curtain 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.
Grooving or fine scratching of the front plastic surfaces can increase the amplitude of the
emission angle of the light curtain, jeopardising detection efficiency in the presence of
lateral reflecting surfaces.
This issue can also cause interference by muting sensors and jeopardise reliability of the
system, also in absence of lateral reflecting surfaces.
It is therefore fundamental to pay particular attention during the cleaning phases of the
curtain front window, especially in environments where abrasive dusts are present. (E.g.
cement factories, etc).
