10
Maintenance
10.1
Safety
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
Do not do repair work on device components.
b
Do not make changes to or manipulate device components.
b
Apart from the procedures described in this document, the device components
must not be opened.
10.2
Regular cleaning
Overview
Depending on the ambient conditions of the multiple light beam safety device, 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.
With increasing contamination, the 2 illuminated diagnostic LEDs 1 and 2 indicate that
the active unit is receiving a weak signal from the passive unit. If the device is not
cleaned and contamination increases, the protective device 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 on the regular rod test check.
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 active and pas‐
sive units for short scanning ranges 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 active unit
and then switch it back on.
°
Scratches or damage. Replace the device if the front screen is scratched or
damaged.
b
Make sure that all reflective surfaces and objects maintain a minimum distance
from the light beams.
b
Make sure that no dispersive media (e.g., dust, fog, or smoke) are within the calcu‐
lated minimum distance from the light beams.
MAINTENANCE
10
8024782/2019-11-19 | SICK
O P E R A T I N G I N S T R U C T I O N S | deTem4 A/P
85
Subject to change without notice