•
Do the machine operators know the function of the protective device?
•
Have the machine operators been trained to work on the machine?
•
Have the machine operators been notified about modifications to the machine?
•
Does the hazardous area to be secured have to be checked with a test rod,
?
b
Define all guidelines for the thorough check.
Regular thorough check
The test is intended to ensure that the hazardous area is monitored by the protective
device and that unprotected access to the hazardous area is prevented.
The following points are often helpful for the definition of the thorough check:
•
Which thorough check must be carried out and how is it carried out?
°
°
"Visual check of the machine and the protective device", page 25
•
How often does the thorough check have to be carried out?
•
Do the machine operators have to be notified of the thorough check and do they
need to be instructed accordingly?
b
Define all guidelines for the thorough check.
4.5.1
Test rod check
Overview
The light beam is covered with an opaque test rod (minimum diameter of 30 mm).
When the light beam is covered, the higher level test device must switch off. The check
is carried out at multiple positions between the sender and the receiver.
Important information
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 check.
b
Make sure that the outputs of the single-beam photoelectric safety switch do not
affect the machine during the 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.
Do not operate the machine if the higher level test device does not switch off during the
test.
b
If the higher level test device does not switch off, even briefly, during the test, work
must stop at the machine.
b
In this case, the mounting and electrical installation of the single-beam photoelec‐
tric safety switch must be checked by appropriately qualified safety personnel.
Approach
1.
Cover the light beam completely.
✓
The higher level test device switches off.
2.
Enable the light beam.
✓
The higher level test device switches on.
4
PROJECT PLANNING
24
O P E R A T I N G I N S T R U C T I O N S | L25
8024678/2020-01-24 | SICK
Subject to change without notice