Eaton DET-RSMOKE Manual
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8SITINGFactors Affecting PerformanceThe DET-RSMOKE smoke detector is designed to do three things:• Detect smoke.• Sound an alarm when it detects smoke.• Send a radio message to the alarm system control unit when it detects smoke.Each of these functions can be affected by the environment around the detector.Detecting SmokeThe DET-RSMOKE is an optical smoke detector. This is one of the most common types ofsmoke detector in use. An optical smoke detector works by admitting a continuous flow ofair to a small chamber that is shielded from all external light. Inside the chamber a lampshines a beam of light through the air. A light detector (photocell) to one side of the beamlooks for any light scattered by particles within the beam. The light is designed to be scat-tered easily by small amounts of smoke entering the chamber.All optical smoke detectors that operate in this way have the following challenges:• They do not detect radiant heat.• They do not detect heated air.• Other types of particle can mimic smoke (for example dust, water droplets, insectsor steam).• The detector cannot detect any smoke if air movement around the detector isrestricted. |
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