10
Maintenance
10.1
Regular cleaning
Overview
Depending on the ambient conditions of the safety light curtain, the front screens must
be cleaned regularly and in the event of contamination. Static charges can cause dust
particles to be attracted to the front screen.
The weld spark guard and deflector mirrors must be cleaned regularly and in the event
of contamination.
With increasing contamination, the 2 illuminated diagnostic LEDs 1 and 2 indicate that
the receiver is receiving a weak signal from the sender. If the device is not cleaned
and contamination increases, the safety light curtain switches to the OFF state when
contamination is high.
Important information
DANGER
Hazard due to lack of effectiveness of the protective device
Persons and parts of the body to be protected may not be recognized in case of
non-observance.
b
Regularly check the degree of contamination on all components based on the
application conditions.
b
Observe the information concerning test rod testing.
DANGER
Hazard due to lack of effectiveness of the protective device
Persons and parts of the body to be protected may not be recognized in case of
non-observance.
b
Make sure that the optical properties of the front screens of the sender and
receiver are not changed, e.g., by:
°
beading water, mist, frost, or ice formation. If applicable, remove films or
other types of contamination, disconnect the voltage supply of the receiver
and then switch it back on.
°
Scratches or damage. Replace the device whose front screen is scratched or
damaged.
b
Make sure that all reflective surfaces and objects maintain a minimum distance
from the protective field.
b
Make sure that no dispersive media (e.g., dust, fog, or smoke) are within the
calculated minimum distance from the protective field.
DANGER
Hazard due to unexpected starting of the machine
b
Make sure that the dangerous state of the machine is and remains switched off
during the cleaning.
b
Make sure that the outputs of the safety light curtain do not affect the machine
during the cleaning process.
10
MAINTENANCE
122
O P E R A T I N G I N S T R U C T I O N S | deTec4
8021645/1EB0/2022-04-28 | SICK
Subject to change without notice
