Structure and function
3
Function
20
Building Technologies
007016_i_en_--
Fire Safety
2012-09-07
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)
distance
[m]
deviate-
signal
[%]
covered-
reflector
value
[%]
values
date &
action
signal-
value
[-]
notes
Label for entering the measurements
3.3
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.
E
S
1
2
3
Function of the linear smoke detector without smoke
1 Detector
E Receiver
2 Reflector
S Transmitter
3 Measuring section 5…100 m
