Planning
Measures for strong extraneous light
4
51
Building Technologies
007016_i_en_--
Fire Safety
2012-09-07
4.14
Measures for strong extraneous light
Interferences of the detector by extraneous light are rather rare. If faults occur
when there is strong extraneous light, use the extraneous light filter DLF1191-AC.
See also
Extraneous light filter DLF1191-AC [➙ 32]
4.15
Determine parameter set
A parameter set can be used to set the linear smoke detector perfectly to the
ambient features.
Two types of parameter set, each with three sensitivity levels, exist. The parameter
sets with open line and with British Standard Alarm differ in the way the smoke
detector responds to a signal interruption.
Parameter sets with interruption
Parameter sets with British Standard Alarm
In the case of a signal interruption (signal
less than 10 % of the compensation value),
the 'Signal interruption' fault occurs. An
alarm is suppressed.
In case of a signal interruption (signal below
alarm threshold), an alarm is actuated.
In the case of a distance interruption (signal
less than 40 % of the compensation value),
the 'Distance interruption' fault occurs. An
alarm is suppressed.
In the case of a distance interruption
(distance measuring less than 40 % of the
initialization distance), the 'Distance
interruption' fault occurs. An alarm is
suppressed. When the signal drops below
the alarm threshold during the fault, an
alarm is actuated after 40 s.
After canceling the fault, any possible alarm
is delayed for 40 s.
-
With distances of less than 7 m, the distance
is not evaluated.
With distances of less than 7 m, the distance
is not evaluated.
The table below shows the parameter sets in three sensitivity levels and sample
applications of the parameter sets.
Parameter set
No. Name
Properties of the monitored room
Examples of application
01
Standard with open line
02
Standard with British
Standard Alarm
Low to medium concentration of
valuable property
Low danger to life
No smoking ban necessary
Industry, erection shops, diesel vehicle
traffic, garages, restaurants, kitchens,
smokers' rooms
03
Sensitive with open line
04
Sensitive with British
Standard Alarm
Medium concentration of valuable
property
Low danger to life
No smoking ban necessary
Offices, warehouses, electric vehicle
traffic, congress centers
05
Very sensitive with open line
06
Very sensitive with British
Standard Alarm
High concentration of valuable
property
Medium danger to life
Smoking ban
Clean warehouses, museums, archives,
EDP and telecommunication systems in
clean environments, high level of air
change
