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PROCEDURE AND CIRCUIT FOR RECOGNITION OF DANGERS IN DANGER, SPECIFIC FIRE ALARMING SYSTEM
PROCEDURE AND CIRCUIT FOR RECOGNITION OF DANGERS IN DANGER, SPECIFIC FIRE ALARMING SYSTEM
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机译:危险,特殊火灾报警系统中危险识别的程序和电路
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摘要
A method and apparatus for monitoring an alarm system such as a fire alarm system having a plurality of alarms connected to a central station determine the amount of departure of measured alarm values from a rated quiescent value and calculate a fluctuation value therefrom, the fluctuation value then being compared at selected time intervals with a rated limiting value. If the result of the comparison shows that the fluctuation value is less than the rated limiting value, a malfunction signal is displayed.
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