Edwards EWS System Design Criteria

Warning and Notification Systems Design Criteria Edwards Difference 1872 Edwards has been dedicated to producing the finest Equipment available Edwards Warning Systems are shaped continuous quality perfomance durability and reliability Each siren hand built in the United States by signaling professionals and then to exacting standards We use only American made industrial continuous duty motors for the ultimate in reliability Edwards are rated by the Nuclear Regulatory Commission at 53 years of free use decoders are field programmable and field serviceable and will work with your local service technicians to ensure any re are completed correctly All siren parts are made from non corro metals and are powder coated to provide additional protection the elements Sound projection from all but one of Edwards si is Omni Directional resulting in full decibel output in all directions all times OMNI Directional Advantage is a common misconception to directly compare the dB rating of a siren with that of an Omni Directional siren Because the siren it spends much of its on time facing away from any given where the dB level has dropped When a siren survey is done a given area the siren output is considered and a circle is drawn a map to estimate the area that the siren should cover However a rotating beam type siren the area is covered only 25 of the by the maximum beam output and 75 of the on time by a beam output Therefore the rotating beam siren presents its output to your ear only 1 4 of the time the survey map does not consider the effect that the has on the sound of the signal to the human ear The effect of sound rotating toward and then away from any given point causes peaking and ebbing of the sound and a potentially dangerous Imagine for a moment that your town uses a series of signals warn its populace one steady blast for a tornado and a warbling for all clear Now consider what the rotating siren steady will sound like with its peaking and ebbing effect The result can a very confused populace and a resulting disastrous situation Omni Directional sirens project the same decibel level in all simultaneously They provide 360 degrees of coverage and you use multiple sirens there will not be the distortion that occurs a rotating siren Siren Survey Edwards we specialize in designing custom siren systems to best any given project Our no charge no obligation Siren Survey will away the guesswork Just call and we will connect you to a site who will produce a scale topographical map of your project with suggested siren placement siren models activation and estimated costs Let us know what you want to do and will help make your project a reality See Map 1 and Map 2 the following page for examples of 2 D and 3 D project maps Warning Siren Horn Equal Length Single Row and EWS V10 Series Activation Systems CHOOSE ONE ONLY B OR C Line Activation to Achieve Siren Timing Functions Radio Equipment Push Button controller EWS SWM Start button momentary operator controlled EWS SW button on off functions only controlled EWS CL Use alone or in conjunction with another system Allows for example a daily at noon or blasts at 7 a m noon and p m Field programmable activates magnetic directly and acts independently from activation systems 1 2 D Image for topographical study 2 3 D Image for topographical study Defense Steady blast for three minutes Of Standard Siren Output Signals Alert Attack Civil Defense Warbling signal for three minutes Fire Cancel Stops all functions all timing is adjustable 15 sec on 15 sec off for three minutes but is field programmable Activation Decoder 150 174 MHz Decoder 450 470 MHZ with the following pre programmed signal packages see Siren Output Signals above A B C D A B D C D