Fire-Lite 30-3003 Explosion-Proof Smoke Detector

30-3003 Smoke Detector Pyrotector Model 30-3003 Explosion Proof Smoke Detec- is a sensitive yet rugged protection device that is designed use in hazardous industrial and commercial locations. The is designed to operate effectively with both slow smol- and fast burning fires. Rugged construction. Self checking and compensating circuitry maintains desired Heightened sensitivity triggered when smoke is increasing, has not yet reached the preset sensitivity setting. Form A (SPST) N.O. contacts for connection to alarm out- circuitry. SPST N.C. contacts for supervision of input power. 2.3% fixed sensitivity. Combustible storage facilities. Munitions manufacturing. Volatile chemical storage. Chemical processing plants. Petroleum refineries. Turbine enclosures. & Operation photoelectric smoke detector uses a solid-state infrared- diode (IRED) and a light-sensing photovoltaic cell in a labyrinth assembly. The labyrinth permits free to smoke but restricts external light. Because of its function to the operation of the detector, each IRED is with extreme care and is subjected to rigorous pre- testing to ensure long-term reliability and perfor- normal operation (no smoke), the detector samples the approximately every four seconds for a period of less than millisecond. The photovoltaic smoke cell, which is placed an angle to the pulsed invisible light source, is sensitive to infrared light in the specified frequency emitted by the light source and is designed to receive a signal only the pulsed IRED source is activated. See Sec- of Sensing Chamber Assembly at top of opposite column. smoke enters the chamber, the light from the IRED off the smoke particles and reaches the photovoltaic cell. When the amount of light reflected by smoke the factory-set threshold level, the smoke alarm circuit actuated. detector will respond to a slow smoldering fire when in the chamber reaches the preset sensitivity setting, 2.3%. a fast-burning fire should occur, including fires in flammable and other materials such as plastics that generate black the abnormally rapid movement of smoke into the chamber is sensed by a special rate-compensating F-920 Initiating Devices Section of Sensing Chamber Assembly An increase in smoke within the detection chamber exceeds a preset rate causes the rate-compensation cir- to increase the intensity of the light source, which detector sensitivity. If the smoke continues to build this rate, an amplifier circuit is triggered and the unit gener- an alarm. If not, the detector reverts to normal sensitivity. normally smoky atmospheres, the detector will not go into as long as the concentration is less than the fixed sensi- of the detector. This results in a sensitive and positive with a very low potential for unwanted alarms. main enclosure of the detector contains the electronic cir- alarm relay, and supervision relay. Operation. To ensure reliable operation, the Model is equipped with self-checking circuitry. A regulation which is matched to the smoke detection circuit, monitors the output intensity of the IRED and it as necessary to compensate for an accumulation of or other contaminants, or any other variation that can with temperature and time. A power supervision relay in detector provides a trouble output signal in the event of an power failure. detector uses extensive filtering against RF and transient In addition, there is a two-second time delay an alarm is generated. printed circuit board inside the detector is coated to mini- the possibility of problems caused by moisture accumula- Outputs. The detector provides a set of Form A N.O. contacts for connection to the alarm output cir- and a set of SPST N.C. contacts for supervision of input An auxilliary set of Form C (SPDT) NO/NC alarm relay is also provided for controlling remote annunication 03/21/2012