Siemens FDOOTC241 - Features of the Technical CO Alarm

Structure and function
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Building Technologies A6V10209291_f_en_--
Fire Safety & Security Products 05.02.2010
3.1.2 Features of the Technical CO Alarm
Alongside its fire detection functionality, the FDOOTC241 also has a CO detection
functionality with the following features:
 Static or dynamic alarm profiles
 Real time interpretation of the situation
 Process- and time-controlled switchover of the parameter sets for CO
Signal processing by the 'Technical CO Alarm' is undertaken regardless of CO
signal processing for the fire detection functionality with the 'Suppression CO' and
'Balanced CO' parameter sets.
The signal processing feature of the 'Technical CO Alarm' enables optimum
calculation of the CO concentration. The electro-chemical cell allows the best
possible level of accuracy to be obtained depending on the ambient conditions.
The FDOOTC241's CO detection is characterized by the ability for parameters to
be set and a relatively low cross-sensitivity to other gases, e.g. ethanol or hydrogen
(H(H
2
).
Function of the Technical CO Alarm's signal processing
The following figure shows CO signal processing by the FDOOTC241 as a
diagram.
CO
t
°C
CO
Warning level
Technical CO alarm
Result
Signal analysisSensory Algorithms
Environment:
CO and other
gases
Signal processing by the technical CO alarm
Sensory
The signals captured by the CO sensor are corrected with regard to CO exposure,
sensor sensitivity, temperature and aging and supplied to the algorithm. The
algorithms are set by selecting the parameter set.