Co Monitoring; Configuration - Siemens FDOOTC241 Technical Manual

4.3.1.2

CO monitoring

4.3.2

Configuration

Building Technologies
Fire Safety & Security Products
CO monitoring compares the current measured CO concentration with a preset
threshold value.
Alarming takes place when the current measured CO concentration temperature
exceeds the set threshold value.
You can set the CO concentration threshold value in stages of 5 ppm between
20 and 600 ppm.
Hysteresis ranges
You can set two hysteresis ranges:
A fixed hysteresis range of 5 % of the threshold value.

‒ For low CO concentrations, a minimum hysteresis range of 2 ppm is
specified.
‒ For high CO concentrations, the hysteresis range is limited to 15 ppm.
Instead of a having fixed hysteresis range, the average CO concentration over

the last 15 minutes is calculated. Alarming takes place if the threshold value is
exceeded.
‒ The hysteresis range is permanently set to 6 ppm.
The Technical Ambient Supervision Alarm is configured on the control panel using
the configuration tool. You can configure the detector as follows:
Settings for temperature monitoring:
Adjustable values
Normal hysteresis range
Large hysteresis range
Temperature [°C] + 30
Temperature undershot/
temperature exceeded
Settings for CO monitoring:
Adjustable values
Normal
Slow
CO concentration in stages
of 5 ppm
Notes
Hysteresis range of 1 °C
Hysteresis range of 5 °C
Permissible temperature range: -20 ... +50 ℃
Selects whether the output signal should be sent when the
set threshold value is undershot or exceeded.
Notes
Hysteresis range of 5 % of the threshold value, max. 15 ppm
Average CO concentration over 15 minutes, hysteresis
range of 6 ppm
Permissible CO range: 20 ... 600 ppm
Planning
55
A6V10209291_f_en_--
05.02.2010