Siemens FDL241-9 - Accessories

4.8 Fine-tuning of the detector optics
1
2
3
4
5
7
6
9
2
8
Figure 24: Fine-tuning with the adjustment device
1 Knurled screw for horizontal
adjustment
6 Adjustment device
2 Safety screws 7 Bushes
3 Hood 8 Knurled screw for vertical
adjustment
4 Alarm indicator 9 Opening for cable entry
5 Button
When you change the setting, the course of the signal is trapezoidal (see figure
below). For optimum setting of the detector optics, the setting must be in the
middle of the trapezoid (pointD). If the detector optics is not optimally set, e.g.
between points B and A, problems and faults may occur during operation, e.g.
greater susceptibility to mechanical changes.
y
x
B
C
D
A
Sub-optimum
Signal level
Signal course
Sub-optimumOptimum
Impermissible
x The course of the signal level
when changing the setting
y Signal level (display on the
adjustment device)
To optimally set the detector optics, proceed as follows:
w The detector line is switched on.
Commissioning
Fine-tuning of the detector optics
4
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