2 ASD-200
SATEL
Fire alarm
Smoke detection
An optical method is used for the detection of visible smoke. When the concentration of
smoke in the optical chamber exceeds a given threshold, an alarm is triggered. The smoke
sensor operating parameters are modified depending on the temperature changes recorded
by the heat sensor (thermistor). The detector automatically compensates for gradual changes
in the optical chamber caused by deposition of dust.
Temperature detection
The temperature exceeding 54°C or a too fast temperature rise (see table 1) will trigger an
alarm.
Air temperature rise
velocity
Lower limit of response
time
Upper limit of response
time
1°C/min
29 min
40 min 20 s
3°C/min
7 min 13 s
13 min 40 s
5°C/min
4 min 9 s
8 min 20 s
10°C/min
1 min
4 min 20 s
20°C/min
30 s
2 min 20 s
30°C/min
20 s
1 min 40 s
Table 1. Response time limits for the heat sensor.
Fire alarm signaling
The alarm is indicated visually (LED steady light) and acoustically (continuous sound) for 5
minutes. Pressing the test / reset button (Fig. 1) during the alarm will clear the alarm
condition.
Detector test
If you want to test operation of the detector, press the test / reset button (Fig. 1). A short
sound will be heard. After a few seconds, the fire alarm should be triggered.
Tamper
Opening the enclosure (opening the tamper switch) is treated as tamper.