System for testing NAC operability using backup power
First Claim
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1. A method for determining whether a notification appliance circuit has sufficient voltage to operate when powered by backup power, the method comprising:
- determining impedance of the notification appliance circuit;
determining, based on the impedance, a voltage drop across at least a part of the notification appliance circuit when powered by the backup power; and
determining when powered by the backup power supply whether there is sufficient voltage to operate the notification appliance circuit based on the voltage drop.
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Abstract
A monitoring system for a NAC (Notification Appliance Circuit) is provided. The monitoring system includes a system controller, and a NAC comprised of notification appliances that may be in a series. The NAC and its appliances may be operatively coupled to the system controller. The system controller is operable to determine whether a notification appliance has sufficient voltage at a low voltage operation.
28 Citations
22 Claims
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1. A method for determining whether a notification appliance circuit has sufficient voltage to operate when powered by backup power, the method comprising:
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determining impedance of the notification appliance circuit; determining, based on the impedance, a voltage drop across at least a part of the notification appliance circuit when powered by the backup power; and determining when powered by the backup power supply whether there is sufficient voltage to operate the notification appliance circuit based on the voltage drop. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for monitoring a notification appliance circuit (NAC), the method comprising:
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determining a first average NAC voltage and a first NAC current supplied from a first source, determining a second average NAC circuit voltage and a second NAC circuit current supplied from a second source, and comparing the first average NAC voltage and the first NAC current with the second average NAC voltage and the second NAC current to determine whether the notification appliance circuit has sufficient voltage when powered by at least one battery.
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14. A notification appliance circuit monitoring system, the system comprising:
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a controller; a notification appliance circuit, the notification appliance circuit being operatively coupled to the system controller; and at least one sensor to sense at least one electrical parameter of the notification appliance circuit, the at least one sensor in communication with the controller, wherein the controller is operable to determine, based on the sensed electrical parameter, whether the notification appliance circuit has sufficient voltage to operate when powered by backup power. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22)
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Specification