| 摘要 |
PROBLEM TO BE SOLVED: To provide a fire receiver, which never outputs a caution signal even if dust is slightly increased without smoke, or never gives a false alarm by determining the propriety of caution level based on the generation frequency of the caution signal, and giving a notice to urge change of the level. SOLUTION: The fire receiver comprises a level setting means for setting an alarming level, a first caution level lower than the alarming level, and a second caution level lower than the first caution level; a timer for measuring the time in which the detection level detected by an analog fire sensor is exceeding the second caution level; a determination means for determining whether the time of exceeding the second caution level is a predetermined time or more; and a report means for giving, when it is determined that the time of exceeding the second caution level is the predetermined time or more, a notice that it is desirable to raise the alarming level and the first caution level. COPYRIGHT: (C)2008,JPO&INPIT
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