Product description
32
© SICK AG · Germany · All rights reserved · Subject to change without notice
8012471/ZN27/2017-06-09
Operating Instructions
LMS1xx Laser Measurement Sensors
Chapter
3
3.6.4
Contamination measurement
The LMS1xx has an optics cover for protection. This optics cover can become contaminated.
The laser beam radiation emitted and received is reduced by the contamination. As a result
scanned objects are perceived with a lower remission than they actually have, or no longer
measured at all from a certain level of contamination.
For this reason the contamination is measured continuously while the device is in operation.
From a certain contamination level, initially a contamination warning is output; if the con-
tamination becomes worse, a contamination error is output and the LMS1xx disables the
measurement mode.
Depending on the application in which the LMS1xx is used, you can choose between various
strategies for the contamination measurement.
P
ROJECT
TREE
, LMS…, P
ARAMETER
, C
ONTAMINATION
MEASUREMENT
.
Inactive
No contamination measurement
Highly available
Contamination warning and contamination error are only output on even contamination
of the optics cover.
Available
Contamination warning and contamination error are only output on partial
contamination of the optics cover.
Sensitive
Contamination warning and contamination error are output even with isolated
contamination.
Recommendation
The cleaner the application environment, the lower you can set the sensitivity for the con-
tamination measurement. The more exact the measured result must be, the higher you
should set the sensitivity of the contamination measurement.
Contamination warning and contamination error are indicated on the LEDs on the LMS1xx
(see
section 9.2 “Error displays of the LEDs” on page 89
). You can also read these states
using telegrams.
Important
The LMS14x Core only provides 2 levels when indicating contamination:
No indication/contamination measurement inactive
80 % contamination warning, 50 % contamination error
You will find a detailed description of the different telegrams in the document “Telegram
Listing Laser Measurement Sensor”, part no. 8014631, issue in English.
Please see
