LST 2251CTLE ユーザーズマニュアル

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0832–CPD–0518
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2251CTLE_DBL_LST_EN_0850.PDF • PAGE 1
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Building Safety. Building Security.
Description
The Multi-criteria Detector 2251CTLE incorporates four 
separate detection units, allowing to determine the four 
essential characteristics of fi re:
  • 
 – carbon monoxide
  • 
OP 
 – optically visible smoke
  • 
 – temperature
  • 
IR 
 – infrared radiation
The  typical  patterns  of  fi re  are  recognised  by  means 
of intelligent analysis of the measured values of all four 
detection units. That way on the one hand the detector 
shows an especially high insensitiveness to unwanted  
alarms, on the other hand fi res are recognised quickly 
and safely.
The multi-criteria detector can operate in diffi cult fi elds 
of application, for instance
  • workshops – e.g., welding shops, paint shops
  • hotel rooms with steam formation in the bathroom
  • smoking areas in bars or restaurants
  • discotheques with fog generators
  • garages or loading ramps
and is therefore suitable for virtually universal use.
•   ADM loop technology with 
System Sensor/200 protocol
•   Combines optical smoke sensor, heat 
detector, infrared sensor and carbon 
monoxide sensor
•   Highest false alarm immunity
•   Several sensitivity levels and thermal-
only mode selectable
•  Constant response sensitivity
The  optical  measurement  chamber  uses  the 
scattered light principle to detect visible smoke 
particles. The thermal unit responds to tempera-
ture changes within defi ned time intervals (rate-
of-rise principle according to class A1R) up to a 
maximum temperature of 58°C.
Smouldering fi res which spread out slowly can 
also be detected early and safely by using the 
durable  carbon  monoxide  sensor.  The  infrared 
sensor responds to the fl ickering of fl ames and 
supports the detection of fi res with low smoke 
development (e.g., alcoholic fi res).
The  two  LEDs  with  360°  visibility  indicate  the 
activated condition of the detector.