| 摘要 |
<p>A system for monitoring the operability of fire event sensors having a programmable logic circuit (400) which automatically and continuously analyzes wheter reading obtained from fire event sensors (410, 420, 430) satisfy multipel predetermined parameters. Parameters defining operabiltiy may include the mere receipt of a signal from a sensor, elapsed time between a request for data bz the circuit and receipt of said data, substantive quality of signals, sensor sensitivity, strenght of power source (302), or other parameters. The parameters are modifiable to faciliate many different types of sensors without hte addition of any additional circuitry. The system also monitors operability of the self-checking routine (276) itself as well as checking the circuitry (274) of a fire detection unit and strength of power source (302).</p> |
