| US 7,333,010 B2 | ||
| Method and apparatus for verifying operation of notification appliances during low input voltage condition | ||
| Mark P. Barrieau, Baldwinville, Mass. (US); Jeffrey R. Brooks, Ashburnham, Mass. (US); Anthony J. Capowski, Westford, Mass. (US); Kenneth E. Savage, Jr., Fitchburg, Mass. (US); and Daniel J. Gauvin, Templeton, Mass. (US) | ||
| Assigned to SimplexGrinnell LP, Westminster, Mass. (US) | ||
| Filed on Nov. 18, 2005, as Appl. No. 11/282,358. | ||
| Claims priority of provisional application 60/665449, filed on Mar. 25, 2005. | ||
| Prior Publication US 2006/0214811 A1, Sep. 28, 2006 | ||
| Int. Cl. G08B 29/00 (2006.01) | ||
| U.S. Cl. 340—514 [340/506; 340/508; 340/286.05] | 22 Claims |
| 1. A method for verifying operation of notification appliances on a notification appliance network during low input voltage
conditions, comprising:
measuring an output voltage at a control panel, the output voltage being supplied to a network;
measuring an input parameter at a notification appliance connected to the network; and
calculating a supply line impedance for the notification appliance based on at least one of the output voltage and the input
parameter, at least one of the supply line impedance, the output voltage and the input parameter being used to determine a
pass/fail condition for the notification appliance during a low voltage condition.
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