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en | Product Description
Conventional Automatic Detectors
2019.11 | 5.0 | F.01U.003.962
Operation Guide
Bosch Sicherheitssysteme GmbH
Chemical sensor (CO gas sensor)
The gas sensor (refer to Configuration of the Detector
(4)
, only FCP‑OC
500(-P)) detects
mainly the carbon monoxide (CO) that is produced by a fire, but it also detects hydrogen (H)
and nitrogen monoxide (NO).
The basic measuring principle is CO oxidation on an electrode and the measurable current
that arises from this. The sensor signal value is proportional to the concentration of gas.
The gas sensor supplies additional information in order to reliably suppress the disturbance
variables.
Pollution sensor
The contamination level of the detector surface is measured and evaluated continuously by the
pollution sensor (refer to Configuration of the Detector
(6)
).
1.5
LED Operation
The two-color LED of the detector indicates the operation and alarm statuses.
During the whole life cycle, the sensors are self-monitored and the sensitivity is self-adjusted
according to the programmed threshold.
In case of an alarm, the LED turns red. The detector is set back to standby if the alarm is reset
via the fire panel and if the cause of the alarm is gone.
LED Operation
Status
LED
Standby
off
Alarm
red
Trouble
off
Test mode
green, flashes once every second
In test mode, the contamination level can be read via the number of the red LED flashes (refer
to
