Siemens FDL241-9 - Fine-Tuning of the Detector Optics

Commissioning
Fine-tuning of the detector optics
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Building Technologies
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Fire Safety 2012-09-07
6.8 Fine-tuning of the detector optics
1
2
3
4
5
7
6
9
2
8
Fine-tuning with the adjustment device
1 Knurled screw for horizontal
setting
6 Adjustment device
2 Safety screws 7 Connection sockets
3 Hood 8 Knurled screw for vertical setting
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
S
ignal 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)