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8018478/YWL5/2018-06| SICK
O P E R A T I N G I N S T R U C T I O N S | NAV245
Subject to change without notice
PRODUCT DESCRIPTION
3
3.6.2
Contamination measurement
The NAV245 has an optical cover to protect it. This optical cover can get dirty.
Contamination reduces the energy emitted and received by the laser beam. As a result,
scanned objects appear to have a lower remission than they actually have and, with a
certain level of contamination, it will no longer be possible to perform measurements.
For this reason, the contamination is measured constantly during operation. When a
certain level of contamination is reached, a contamination warning is output initially. If the
contamination becomes stronger, then a contamination error is output and the NAV245
deactivates measuring mode.
Depending on the application in which the NAV245 is used, you can choose from different
contamination measurement strategies.
Project tree, NAV245, Parameters, Contamination measurement.
•
Inactive
Contamination measurement is not carried out.
•
High availability
Contamination warnings and contamination errors are only output when the front screen
is uniformly contaminated.
•
Available
Contamination warnings and contamination errors are only output when the optical
cover is partially contaminated.
•
Sensitive
Contamination warnings and contamination errors are even output for isolated areas
of contamination.
Recommendation
The cleaner the application environment is, the lower you can set the contamination
measurement sensitivity. The more accurate the measurement result must be, the higher
you must set the contamination measurement sensitivity.
Contamination warnings and contamination errors are displayed on the LEDs of the NAV245.
They can also be read out using telegrams.
A detailed description of the different telegrams can be found in the document “Telegram
listing LMS1xx”, part no.: 8014631 with the accompanying “Supplement telegram listing
NAV245”, part no.: 8018823, English versions.
A contamination error is also reported on a digital or external output if this has been
configured for the function “Contamination”.
