Function - Siemens FDL241-9 Technical Manual

Structure and function
3

Function

3.3
20
Building Technologies
Fire Safety
Labels
In der Haube sind zwei Etiketten beigelegt. Measurements are entered on these
labels when commissioning or checking the linear smoke detector. These
measurements serve as a basis for troubleshooting when periodically checking the
linear smoke detector.
FDL241-9; commissioning & adjustment data
(values displayed on adjustment device)
values distance signal-
[m] value
date &
[-]
action
notes
Label for entering the measurements
Function
The linear smoke detector smoke detector consists of a transmitter and a receiver
and works according to the principle of light attenuation by smoke. The transmitter
transmits to the reflector a highly focused, pulse-shaped infrared ray. If no smoke is
present, a large part of the infrared ray reaches the reflector and is returned to the
receiver. The incoming light generates an electric signal on the receiver's photo
diode.
1
E
S
Function of the linear smoke detector without smoke
1 Detector
2 Reflector
3 Measuring section 5...100 m
deviate- covered-
signal reflector
[%] value
[%]
3
E Receiver
S Transmitter
2
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2012-09-07