Potter SPB-24N Projected Beam Smoke Detector

SPB 24N BEAM DETECTOR SPB 24N Projected Beam Smoke Detector consists of emitter and receiver The projected beam smoke detector be placed so that smoke generated by a fire will likely into the path of the beam The receiver is constantly and measuring the intensity of the beam transmit by the emitter Should the smoke from a fire cause a in the signal strength of a magnitude that exceeds programmed obscuration setting an alarm signal is SPB 24N Projected Beam Smoke Detector can provide fire detection in applications where other type detectors not be able to respond quickly or at all to a fire condition of some applications where projected beam smoke have been successfully used include gymnasiums theatres museums tunnels churches stables chambers high air velocity areas The SPB 24N Projected Beam Detector may also be used in conjunction with more spot type smoke detection devices to provide an more comprehensive detection system more information on how to install the SPB 24N Projected Smoke Detector consult the SPB 24N Installation Guide and the applicable NFPA Standards for guidance near infrared pulsed beam generated by the emitter is by the photodiode of the receiver where it is into an electrical signal This signal is then ampli and applied via an analog to digital converter to a The normal state signal the initial beam once stored in the microprocessor is used as reference comparison with subsequent beam signals there is a difference between actual beam strength and reference data that exceeds the programmed alarm 1430027 SPB 24N FEATURES Microprocessor based for reliability Simple setup alignment with signal strength LED Provides 60 feet on center linear protection at a range of feet to 328 feet Automatic compensation for signal drift or dirty lens Three field adjustable sensitivity settings Form A alarm and Form B trouble contacts Calibrated filters available to verify sensitivity Color coded emitter and receiver labels for easy recogni Voltage Voltage Current Current Current Temperature 33VDC 24VDC 24VDC 24VDC Tall Wide Deep mount or Gang Box Test Feature Manufacturers test filters subject to change without notice Electric Signal Company 2081 Craig Road St Louis MO 63146 4161 Phone 800 325 3936 Canada 888 882 1833 www pottersignal com IN USA 8840016 REV D 1 OF 2 BEAM DETECTOR continued reference level a fire signal is produced A trouble signal is generated if the beam is more than 90 obstructed opposed to partially obscured by smoke microprocessor also provides compensation for a change in received signal value with time caused by contamination the optics Since such a change with time appears as a slow change in the beam signal the microcomputer compensates such a manner that the signal moves closer to the reference data at a rate approximately 1 per hour When this capability reaches a limit the microcomputer automatically generates a trouble signal calibrated test filter is available upon request to test and verify the sensitivity setting of the projected beam smoke detectors SPECIFICATIONS contractor shall furnish and install where indicated on the plans the SPB 24N Projected Beam Smoke Detector The detector have a range of 32.8 feet to 328 feet The projected beam smoke detector shall be field adjustable to one of the three obscuration of 25 50 or 70 per span These settings shall be capable of being verified with calibrated filters Side to side spacing be a maximum of 60 feet on center projected beam smoke detector shall posses circuitry that automatically compensates for normal ambient changes in the intensity of emitted beam strength The microprocessor shall provide compensation for a change in received signal value with time caused by of the optics Since such a change with time appears as a slow change in the beam signal the microcomputer compensates such a manner that the signal moves closer to the reference data at a rate of approximately 1 per hour When this compensating reaches a limit the microcomputer automatically generates a trouble signal projected beam smoke detector s shall also signal a trouble condition if the beam has a blockage of 90 or more than 20 seconds automatically resets to normal when blockage is removed projected beam smoke detector s shall be UL listed for these applications Voltage and RF transient protection shall be integral to the circuitry of the projected beam smoke detector so as to minimize false alarm potential facilitate easy installation and setup the projected beam smoke detectors shall employ signal strength indicating LEDs Alignment shall facilitated by turning an alignment adjustment wheel and monitoring the relative signal strength based upon which LEDs are illuminated detectors shall also illuminate a red LED which is visible externally when an alarm condition is indicated projected beam smoke detector shall provide a Form dry contact for alarm and Form dry contact for trouble SPB 24N Projected Beam Smoke Detector shall be installed in accordance with the Installation Instruction Guide provided with unit Refer to the applicable NFPA Standards for additional guidance on spacing irregular ceiling surfaces and other design IN USA 8840016 REV D 2 OF 2