INTRODUCTION
1 - 2
DSE-17
www.maxcess.eu
MI 1064 1 C
Ein
führ
ung.fm
Air supply (optional)
The sensor is also available with air supply. Depending on the
type of dirt contamination, this makes it possible to keep the
protection panes, which cover transmitter and receiver, free of
large pieces of dirt with a continuous or pulsing flow of air.
Depending on the degree of dirt contamination and the
installation location, it may be necessary to vary the air
pressure. The air must be clean and oil-free.
Air supply (optional), page 9-5
Improper use
– Operation outside of the technical specifications is not
permitted.
– Operation in areas where there is a danger of explosions is
prohibited.
– The sensor may not be used as a support, handle or step.
– Any use other than the designated use is not permitted.
Mode of functioning
The DSE-17 sensor works with infrared light. Because of this the
sensor is relatively insensitive to visible light.
Several measuring cells measure the difference in transparency
between the material web and the open field of view. This makes
the sensor relatively tolerant to dirt contamination on the sensor
and fluctuations in the transparency of the web material.
Depending on how far the material web covers the sensor field
of view, a part of the infrared light strikes the receiver. The
output signals are generated from this information.
The following rules are used for this purpose:
– The sensor searches for the two largest positive and negative
contrast values in the sensor field of view.
– To prevent improper functionality due for example to slight
amounts of contamination on the sensor protection panes,
only contrast values greater than the set minimum contrast
are used for further signal processing.
– This minimum contrast is set to 32% by default.
– The position of the positive contrast with the smallest
distance from the closed end of the sensor is assigned to the
output function "Edge 1."