Siemens OOH740 - Page 29

Structure and function
Setup
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Building Technologies
A6V10305793_m
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Fire Safety
2016-02-15
Technical CO alarm
The point detector has a high-quality CO sensor which is based on the
measurement principle of the electro-chemical cell.
Instances of the specified CO concentration being exceeded can be detected by
the CO sensor. The limit values vary depending on the parameters set.
You can set the following CO response behaviors on the neural fire detector
OOHC740:
● Static CO alarm thresholds
● Dynamic CO alarm thresholds
The response behavior is configured with the 'Cerberus-Engineering-Tool'
software.
Technical Ambient Supervision Message
'Technical Ambient Supervision Message' mode detects an increase in
temperature or CO concentration above a specified trigger threshold caused by
hysteresis.
Temperature monitoring compares the current measured temperature with a preset
threshold value.
CO monitoring compares the current measured CO concentration with a preset
threshold value.
You can set the following parameters on the neural fire detector OOHC740:
● CO concentration or temperature threshold value
● Messaging when the temperature threshold value is exceeded or undershot
● Messaging when the CO concentration threshold value is exceeded
● Hysteresis range
– Fixed hysteresis range
– Average CO value over a period of 15 minutes
The 'Technical Ambient Supervision Message' is configured using the 'Cerberus-
Engineering-Tool' software.
See also
2 Parameter sets [➙ 30]