Bosch FCS‑320‑TM Series Operation Manual page 14

14 en | Technical specifications
Once the fire source has been identified, it is displayed via a corresponding display on the
FCS-320-TM.
Detection
Depending on the response sensitivity set on the detection module (0.5%/m to 2%/m light
obscuration), the FCS-320-TM-R triggers the main alarm when the appropriate light
obscuration is reached. The sensitivities can also be set at intervals of 0.1%/m using the
FAS‑ASD‑DIAG Diagnostic Software. The alarm is displayed via the alarm display on the unit
and forwarded to the fire panel connected. The alarm thresholds and the display and
transmission of malfunctions can be allocated different delay times. The intelligent
LOGIC·SENS signal processing hides misleading values that are similar to those shown in the
event of a fire, and ensures a high level of security against false alarms.
Alternative sensitivity
The FAS-ASD-DIAG diagnostic software allows the sensitivity set on the detection module to
be changed if necessary.
Monitoring unit
The detection module is monitored for contamination and for signal malfunction. A
malfunction is displayed on the unit and forwarded to the fire panel. Malfunctions caused by
brief environmental fluctuations can be eliminated with a time-delayed setting.
Airflow Monitoring
An airflow sensor checks the connected pipe system for breakage and obstruction.
The airflow sensor can – depending on the configuration of the pipe system (see Principles of
pipe planning, page 28 ) and the setting of the airflow sensors - detect an obstruction of a
single air sampling opening. Airflow monitoring is temperature-compensated and can be set
depending on the air pressure.
On expiry of a defined delay, the malfunction is displayed on the aspirating smoke detector
and the message is transmitted to the fire panel. The monitoring window thresholds can be
modified to suit the environmental conditions (see Airflow Monitoring, page 30 ).
The principal signal curve of the airflow sensor is indicated in the figure below.
S
Example of the signal process of the Airflow sensorairflow
sensor in case of malfunctions.
Calibrating the airflow sensor
The airflow sensor calibration of the FCS-320-TM Aspirating Smoke Detector is performed
automatically when the detection module is inserted into the housing base, provided that the
X4 jumper has been plugged into another socket first. This plug-and-play feature makes the
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Operation guide
Conventional Aspiration smoke detector
S Airflow sensor signal
4
t Time
1 Normal airflow
6
2 Airflow too weak
3 Airflow too strong
5
4 Breakage
t
5 Obstruction
6 Monitoring window
7 Delay
8 Malfunction message
Bosch Sicherheitssysteme GmbH