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PI 

−

 34.62c

Product Information Optical Smoke Detector NOM/NOM K 100 LSN

Seite 12  von 30

BDL

−

F.01U.002.709

A5.en / 29.12.2004

ST

−

FIR/ PRM1 / deh

6.2. Contamination measurement

Contamination is measured using a different method. A second light source 

(infrared LED) sends a light flash to the opposite interior wall.

If the detector is not contaminated, the light beam is absorbed almost completely

by the black interior wall. The presence of small volumes of smoke does not lead to

any substantial change.

The evaluation of this limited volume of light is used to monitor proper detector function.

If the detector is contaminated, the accumulated dirt particles cause the light beam

to be reflected.
Bundled by the convex lens, more scattered light reaches the photo cell. Evaluation

takes place irrespective of the scattered light value determined (see also “Detector

Fault”).

No reflection

of light beam

Reflection of the

light beam to

the smoke particles

Photo diode

Light source for

contamination 

measurement

Measurement when

detector is not

contaminated

Measurement when

detector is

contaminated

Содержание NOM 100 LSN

Страница 1: ...PRODUCT INFORMATION PI 34 62c Page 1 BDL F 01U 002 709 A5 en 29 12 2004 ST FIR PRM1 deh Optical smoke detector NOM 100 LSN NOM K 100 LSN NOM 100 LSN NOM K100 LSN ...

Страница 2: ...gn 9 5 1 Dimensions Detector Module 9 6 Functional Description 10 6 1 Smoke Measurement 11 6 2 Contamination Measurement 12 6 3 Monitoring Stages 13 6 4 Alarm Triggering 15 6 4 1 Alarm Triggering with Slightly Contaminated Detectors 16 6 5 Detector Fault 17 6 5 1 Detector Exchange Required Detectors Highly Contaminated 17 6 5 2 Detector Not Sensitive Enough 18 6 6 Planning Monitoring Change in Fun...

Страница 3: ...0 V 22 8 2 Damp Room Detector Bases NMS F 100 NMS F 100 V 22 8 3 Cavity Detector Bases NMS H 100 NMS H 100V 23 8 4 Ventilation Duct Detector Base NMS K 100 24 8 5 Mounting Tips for Detector Bases 24 8 6 Connection Diagram 25 8 6 1 Detector Base NMS 100 25 9 Tips on Maintenance and Service 26 9 1 Repair 26 9 2 Disposal 26 9 3 Additional Documentation 26 9 4 Service Accessories 27 10 Table of Abbrev...

Страница 4: ...f smoke e g open fires with smoke that is hardly visible and with thick black smoke detection sensitivity is as a result of the design somewhat lesser but does always comply with the values required in line with EN 54 The optical detector is available in two designs Standard smoke detector NOM 100 LSN and Smoke detector NOM K 100 LSN for use in a ventilation duct The smoke detectors are designed f...

Страница 5: ...2 2004 ST FIR PRM1 deh 1 1 Block Diagram Power supply Send data Receive data A D converter Receiver NOM 100 NOM K 100 Contamination measurement Smoke measurement Measuring chamber Microprocessor for data transfer Sensor evaluation FET switch b LSN 1 a LSN 1 LSN LSN Tableau point Open collector rd ye b LSN 2 a LSN 2 ...

Страница 6: ...lds D Measurement of detector contamination using a separate smoke recording method D Individual detector identification D Active sensor technology self monitoring with relevant evaluation electronics D Wide sensor check remote diagnosis D Different detector display via a two color LED red alarm yellow fault D Activation of a remote external detector alarm display D Several base versions are avail...

Страница 7: ...g etc Rooms susceptible to smoke and flash formation 1 Manufacturing workshops smoking offices conference rooms laun dromats Rooms susceptible to smoke and flash formation 2 Halls with vehicle operation combustion engines Recommended Not recommended NOM K 100 NOM 100 Use Wind tunnels with a wind speed of 20m s Wind tunnel electrical risks 1 Anti theft protection If required detector modules can be...

Страница 8: ... smoke detector 2 799 330 865 PC NOM K 100 optical smoke detector for use in a ventilation duct DU Delivery unit PC Pieces PAK Pack 4 2 Detector base Product ID DU Designation 2 799 330 859 PC NMSKV 100 ventilation duct base 4 3 Accessories Product ID DU Designation 2 799 330 669 PC External detector alarm display MPA external detector alarm display according to DIN 14 623 2 799 330 870 PAC Replac...

Страница 9: ...ce and the light receiver a electronic evaluation switching a wire mesh for insect protec tion in the smoke entry opening shielding against electrical interference fields and a silent individual display two color LED The detector base contains the contact and locking pins and the terminal clamps for the detector line and also offers the option of connecting an external detector alarm display The d...

Страница 10: ... the other at one second intervals For contamination measurement an additional light source then sends a light flash to the opposite interior wall In both cases the light which contacts a photo diode provides information about quiescent state contamination or alarm ÎÎ ÎÎ ÎÎ ÎÎ ÎÎ ÎÎ 14 15 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 4 5 Threshold Alarm Number of Light flashes for smoke measurement Light fl...

Страница 11: ...volume of light is used to monitor proper detector function If smoke penetrates the measuring area the light flashes are deflected to the smoke particles The convex lens helps more scattered light reach the photo diode An alarm is triggered if a threshold specified in the detector is reached for three consecutive scattered light pulses The measuring area has a wind resistant design and permits smo...

Страница 12: ...umes of smoke does not lead to any substantial change The evaluation of this limited volume of light is used to monitor proper detector function If the detector is contaminated the accumulated dirt particles cause the light beam to be reflected Bundled by the convex lens more scattered light reaches the photo cell Evaluation takes place irrespective of the scattered light value determined see also...

Страница 13: ... If specific thresholds defined in the detector are exceeded the detector issues a corresponding message at 50 pre alarm message to the control panel at 100 alarm message to the control panel A fault message is triggered if the smoke volume falls below the 0 threshold by approx 20 0 Time Quiescent state value Alarm current 100 Pre alarm Fault 50 Detector pre alarm Can be called up for maintenance ...

Страница 14: ... 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 0 Time Quiescent state value Alarm current 60 100 Fault Exchange Fault 80 30 Slight contamination Severe detector contamination Detector electronics switch off automatically Slight detector contamination No impairment of ...

Страница 15: ...1 3 4 Alarm Pre alarm 1 2 3 4 If there is smoke or contamination the current provoked by the photo cell increases A pre alarm is issued by the detector if 50 of the alarm current is reached This message and its corresponding detector ad dress may be displayed on the control panel if necessary Return to quiescent state value if there is no increase in smoke volume An alarm is triggered if the curre...

Страница 16: ... to contamination Degree of contamination 2 1 3 4 5 No alarm Compensation of 3 1 2 3 4 Detector contamination means that the quiescent state value has already increased Smoke penetration results in an increased measured value The detector compensates for this measured value with the degree of contamination previously determined and saved Return to quiescent state value 5 If following an increase i...

Страница 17: ...creases A message may be transmitted if the 30 threshold is reached in 16 consecutive contamination measurements The detector alarm threshold will simultaneously be increased by the degree of contamination to reproduce the original sensitivity to smoke There may be an automatic order to exchange the detector if the 60 threshold is reached approx 30 has been compensated At 80 of the alarm threshold...

Страница 18: ...RM1 deh 6 5 2 Detector not sensitive enough The detector is automatically switched off if the measured value is approx 20 below the 0 threshold Reliable detection of smoke particles is not possible as the detector is no longer sensitive enough Time Current 0 30 60 80 Fault Exchange Fault Quiescent state value Slight contamination ...

Страница 19: ...e Fault Quiescent state value Slight contamination Change to planning 2 1 1 2 The characteristic curve represents the typi cal path for a recently installed detector There are no fluctuations The detector is appropriate for the installa tion location If when evaluating the measured values the characteristic curve changes but is still within the quiescent state range perform a check to reduce the n...

Страница 20: ... Change in functionality 1 2 The characteristic curve represents the path of a de tector that has already been operational for some time The value has increased slightly due to contamination However the detector remains fully functional If there are fluctuations outside the quiescent state range it can be assumed that the use at the installation location has changed With this sort of atypical fluc...

Страница 21: ...nt light receiver for smoke and dirt measurement Exterior housing LED two color red yellow Smoke penetration penetration 7 Technical Data Operating voltage 12 5V DC 33V DC Current consumption NLT 0 7mA Alarm transmission per word via 2 wire LSN line Individual display two color LED red alarm yellow fault Indicator output max 15mA if activation 0V Work principle Tyndall effect Response sensitivity ...

Страница 22: ...s for Detector Bases 8 1 Standard Detector Bases NMS 100 NMS 100 V C2 LED C1 C Bore hole for fastening screw Arrow for LED and Bosch logo 45 Bore hole for fastening screw 28 5 69 8 2 Damp Room Detector Bases NMS F 100 NMS F 100 V C2 LED C1 C approx 105 Bore holes for fastening screws Arrow for LED and Bosch logo PG screw connection 69 Sealing ring 10 28 5 ...

Страница 23: ...l Smoke Detector NOM NOM K 100 LSN Seite 23 von 30 BDL F 01U 002 709 A5 en 29 12 2004 ST FIR PRM1 deh 8 3 Cavity Detector Bases NMS H 100 NMS H 100V C2 LED C1 C 104 49 34 90 Retaining claw for cavity fastening Arrow for LED and Bosch logo ...

Страница 24: ...5 Mounting Tips for Detector Bases When mounting bases ensure that the LED and the Bosch logo are in the position indicated by the arrow Planning guidelines for mounting height detector distance etc must be observed NMS 100 NMS 100 V NMS F 100 NMS F 100 V Detector bases NMS 100 NMS 100 V NMS F 100 NMS F 100 V are mounted using two screws 4mm in diameter 45mm apart NMS H 100 NMS H 100 V The cavity ...

Страница 25: ...panel or preceding LSN element b LSN 2 to the next LSN element a LSN 2 to the next LSN element C C point if required see connection above Ground connection for cable shielding Position grounding drain wire ground control panel side C1 C2 Unassigned clamps that can be used as required The connections are equivalent from and to are interchangeable Connector pin assignment T 1 T 2 T 3 T 4 External de...

Страница 26: ... should be carried out regularly and by trained personnel D Bosch Sicherheitssysteme recommends a functional and visual inspection at least once a year 9 1 Repair In the event of a defect the entire detector is exchanged 9 2 Disposal Defective detectors are exchanged and should be disposed of in accordance with legal regulations 9 3 Additional Documentation For those with access authorization on t...

Страница 27: ...T Telescope rod 1m 3 38m made from fiberglass can be extended with max 3 extension rods 4 998 112 070 ST Extension bar made from fiberglass 1 m 4 998 112 073 ST Transport case for the test equipment LE Delivery unit ST Pieces PAK Pack Spare parts for the service accessories Plastic cover Adaptation bowl Product ID LE Designation 4 998 082 502 ST Plastic cover for the detector exchange attachment 2...

Страница 28: ...titut für Bautechnik German Institute for Technology DIN German Institute for Standardization GLT DCcurrentlinetechnology LED Light Emitting Diode LSN Local SecurityNetwork PC Polycarbonate PI Productinformation PP Polypropylene UEZ Universelle Europazentrale Universal European Central UGM Universelle Gefahrenmeldezentrale Universal danger detection sys tem uP unter Putz concealed VDE Association ...

Страница 29: ...PI 34 62c Product Information Optical Smoke Detector NOM NOM K 100 LSN Seite 29 von 30 BDL F 01U 002 709 A5 en 29 12 2004 ST FIR PRM1 deh 11 Notes ...

Страница 30: ...Page 30 of 30 Bosch Security Systems Robert Koch Str 100 D 85521 Ottobrunn Info Service Telephone 49 89 6290 1039 Fax 49 89 6290 1039 www boschsecurity com info service de bosch com ...

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