Event notification system and wet well monitor

Details Event notification system and wet well monitor Event notification system and wet well monitor

2006-03-21

2006-03-21

Nguyen, Phung T. (Department: 2632)

Communications: electrical

Condition responsive indicating system

Specific condition

C340S506000, C073S307000

Reexamination Certificate

active

07015819

ABSTRACT:
An alarm detection device for monitoring high level signal in a wet well. The alarm detection device includes a fail safe circuit and an emulation circuit. The incoming high level signal is fed into the fail safe circuit and the emulation circuit. The emulated signal from the emulation circuit is fed to an output to a control panel and an alarm system. If there is any problem with the alarm detection device, the fail safe circuit connects the incoming high level signal directly with the output to the control panel and a high impedance signal is generated for the alarm system. The alarm detection device is powered independently from the control panel.

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patent: 6561135 (2003-05-01), Creech et al.
patent: 6649839 (2003-11-01), Eckert et al.

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