Testing
Leuze electronic
MLD 300, MLD 500
72
9
Testing
The safety sensors must be exchanged after a maximum of 20 years.
Always exchange entire safety sensors.
For the tests, observe nationally applicable regulations.
Document all tests in a comprehensible manner.
9.1
Before the initial start-up and following modifications
Acc. to IEC TS62046 and national regulations (e.g. EU directive 89/655 EEC), tests are to be performed
by competent persons in the following situations:
• Prior to the initial start-up
• Following modifications to the machine
• After longer machine downtime
• Following retrofitting or reconfiguration of the safety sensor
Test the effectiveness of the shut-down function in all operating modes of the machine acc. to the fol
-
lowing checklist.
Document all tests in a comprehensible manner and include the configuration of the safety sensor along
with the data for the safety- and minimum distances in the documentation.
Before they begin work, train the operators on their respective tasks. The training is the responsibility of
the operating company.
Attach notices regarding daily testing in the respective national language of the operator on the machine
in a highly visible location, e.g. by printing out the corresponding chapter see chapter 9.3 „To be per
-
formed daily by the operator“.
Check whether the safety sensor was correctly selected acc. to the locally applicable regulations and
directives.
Check whether the safety sensor is operated acc. to the specified environmental conditions see
chapter 14 „Technical data“.
Make certain that the safety sensor is protected against overcurrent.
Perform a visual inspection for damage and test the electrical function see chapter 9.2 „To be performed
periodically by competent persons“.
Minimum requirements for the power supply unit:
• Safe mains separation
• At least 2 A current reserve
• Power-failure bridging for at least 20 ms
Not until proper function of the Optoelectronic Protective Device is ascertained may it be integrated in the
control circuit of the system.
WARNING
A running machine may result in serious injury!
Make certain that, during all conversions, maintenance work and inspections, the system is securely
shut down and protected against being restarted again.
WARNING
Unpredictable machine behavior during initial start-up may result in serious injury!
Make certain that there are no people in the danger zone.
As a safety inspection, Leuze electronic offers testing by a competent person prior to the initial
start-up see chapter 13 „Service and support“.
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