Bosch NOM 100 LSN Product Information page 14

Product Information Optical Smoke Detector NOM/NOM K 100 LSN
For contamination
The evaluation is made during contamination measurement using the reflection
light measured and the resulting current.
If specific thresholds, defined in the detector, are exceeded, the detector issues a
corresponding message.
− at 30%: service message to control panel and compensation of alarm threshold
− at 60%: order to exchange detector
− at 80%: automatic detector switch−off
A fault message is triggered if the smoke volume falls below the 0% threshold by
approx. 20%.
Fault
Exchange
Slight
contamination
Quiescent state value
Fault
Alarm current
100%
Severe detector contamination
Detector electronics switch off automatically
80%
The detector is too contaminated for
reliable smoke detection
An order to exchange is generated automatically
60%
Slight detector contamination
No impairment of detector
30%
Quiescent state potential with new detector
0%
approx. 1/5 below quiescent state potential
Detector not sensitive enough
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Time
BDL−F .01U.002.709
A5.en / 29.12.2004
ST−FIR/ PRM1 / deh