Fine-Tuning Of The Detector Optics - Siemens FDL241-9 Technical Manual

6.8
Building Technologies
Fire Safety

Fine-tuning of the detector optics

2
9
8
Fine-tuning with the adjustment device
1 Knurled screw for horizontal
setting
2 Safety screws
3 Hood
4 Alarm indicator
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
B
Impermissible
x The course of the signal level
when changing the setting
Fine-tuning of the detector optics
1
2
7
6 5
6 Adjustment device
7 Connection sockets
8 Knurled screw for vertical setting
9 Opening for cable entry
A
D
Sub-optimum Optimum
y Signal level (display on the
adjustment device)
Commissioning
3
4
C
Signal course
Sub-optimum
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2012-09-07
6
x
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