Warning Levels For Co; Diagnosis Levels - Siemens FDOOTC241 Technical Manual

3.3.4

Warning levels for CO

3.3.5

Diagnosis levels

Building Technologies
Fire Safety & Security Products
Measured values above a response threshold depending on the parameter set for
CO are not the only basis for reaching a warning level for CO. The CO progression
is also observed over a longer period of time and evaluated using algorithms.
Neural fire detector FDOOTC241 can convey the following warning levels to the
control panel in the form of a technical message:
Warning level Meaning
of the technical CO
alarm
0 No danger
1 Advance warning level 1/
CO loading
2 Warning
3 Alarm, evacuation
The evaluation of the danger level and the decisions to be taken (e.g. activation
of remote transmission) are configured in the control panel.
For the most part, the detector monitors its function by itself. The signals of all
sensors are permanently monitored. In particular, the temperature sensors, light
emitters, and light receivers are monitored to ensure that they are functioning
correctly. Signal processing takes account of the monitoring results and adapts its
behavior accordingly.
The following diagnosis levels are derived from the different control measurements:
Normal

Observe information

Replacement recommended

Replacement necessary

Fault

Structure and function
Comment
Normal condition
Increased CO concentration
(MAK value=30 ppm CO exceeded)
High CO concentration
The CO concentration has reached
dangerous levels.
This warning level requires parameters
to first be set for the CO evaluation.
The warning level is not available in
degraded mode operation or in default
parameterization.
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05.02.2010