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Structure and function
3
Overview
3.1.4 Features of the 'Technical CO Alarm'
22 | 108
Building Technologies
Fire Safety
Switching over the parameter set
In addition to selecting the parameter set, the point detectors with ASA technology
enable time- or process-controlled switching over of the parameter sets
(Manned/Unmanned switchover). Thanks to this function, the detector can be used
in places where the situation changes regularly and frequently (e.g. kitchens,
production halls).
Downloadable parameter sets
Point detectors with ASA technology have several permanently programmed
parameter sets. For special applications new, additional parameter sets can be
downloaded in the field (depending on the control panel).
The 'Technical CO Alarm' mode can only be selected on the point detector
OOHC740.
Alongside its fire detection functionality, the point detector 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 point detector'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
).
2
Function of the Technical CO Alarm's signal processing
The figure below shows CO signal processing in the form of a diagram:
Environment:
CO and other
gases
CO
°C
Sensory
Figure 4: Signal processing by the 'Technical CO Alarm'
CO
t
Signal analysis
Algorithms
Warning level
Technical CO alarm
Result
A6V10305793_m_en_--
2016-02-15
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