8540571 - 28/04/2008 - Rev.6
31
CHECKOUTS AND MAINTENANCE
VERIFICATION OF BARRIER EFFICIENCY
Before each work shift or before switching on, check the correct operation of the
photoelectric barrier.
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 barrier resolution.
Please see page 34 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.
•
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.
Figure 29
The VISION VX barrier 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.
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).
If the
weak signal "d" letter
appears on the Receiver display, check that:
–
the front surfaces are clean;
–
the Emitter and Receiver are aligned correctly.
If the LED stays on, contact the REER service department.
