SICK MLG-2 Pro

3.8.1 Standard operating mode
Standard operating mode is the mode in which most measuring applications can be
carried out.
•
Only opaque objects can be detected.
•
There must not be a high level of constant light irradiation.
3.8.2 Transparent operating mode
Transparent operating mode enables the detection of transparent objects, such as
those made of glass, PET, etc.
Transparent objects do not completely cover the light beam. In order to detect these
objects, they must have what is known as a minimum detectable absorption (MDA).
NOTE
It is not possible to use the cross-beam function, high operating reserve or high-speed
scan in the Transparent operating mode.
Minimum detectable absorption
In order to detect a transparent object, it must absorb a certain percentage of the
energy from the light beam. Depending on the objects being measured, an object can
be detected with 30% absorption, 15% absorption, or 10% absorption.
NOTE
The minimum detectable absorption that an object needs in order to be detected
increases with the sensing range (see "Minimum detectable absorption", page 124).
Examples of the signal attenuation of transparent objects
1)
:
•
Approx. 10% signal attenuation:
Clean PET bottles, clear glass, thin and clear films (e.g., cellophane), household
plastic film, plastic wrapping
•
Approx. 15% signal attenuation:
Clean clear glass bottles, thick films, film and wrapping folded multiple times
•
Approx. 30% signal attenuation:
Green and brown glass, colored glass bottles
The following prerequisites must be met:
•
The sender and receiver must be aligned precisely with one another.
•
The sender and receiver elements must be kept clean at all times.
AutoAdapt
The AutoAdapt function is active in the Transparent operating mode. AutoAdapt adjusts
the switching threshold at which objects are detected in accordance with the level of
contamination on the MLG-2. As a result, the MLG-2 thus becomes less sensitive as the
level of contamination increases.
3.8.3 Dust- and sunlight-resistant operating mode
Dust and sunlight-resistant operating mode is intended for applications when there is a
large amount of dust in the environment or a high level of solar radiation.
•
Dust and sunlight-resistant operating mode reduces the maximum sensing range
1)
Examples are for illustrative purposes only. The signal attenuation and the minimum detectable absorption to be configured must be
determined for each individual application.
PRODUCT DESCRIPTION 3
8017460.ZIK1/2017-02-13 | SICK O P E R A T I N G I N S T R U C T I O N S | MLG-2 Pro
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Subject to change without notice