| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a gas alarm capable of performing gas inspection immediately after power supply, performing the positive prevention of an erroneous alarm after the power supply even if a power supply voltage fluctuates, and capable of rapidly canceling an alarm stop after the power supply. <P>SOLUTION: Since a CPU controlling the gas alarm stops an alarm while a sensor output Vs detected by a gas sensor becomes smaller than an alarm value after the power supply, the erroneous alarm after the power supply can be prevented even if the power supply voltage fluctuates, and the alarm stop after the power supply can be rapidly canceled. When the sensor output Vs is not smaller than the alarm value even if a time-out time To elapses after the power supply, the CPU cancels the alarm stop and generates the alarm. Thereby, even if injecting an inspection gas while the sensor output Vs does not become lower than the alarm value, the alarm is generated when the time-out time To elapses after the power supply. <P>COPYRIGHT: (C)2011,JPO&INPIT |
