Features to reduce low-battery reporting to security...

Details Features to reduce low-battery reporting to security... Features to reduce low-battery reporting to security...

G - Physics

08

B

G08B 29/12 (2006.01)

Patent

CA 2640016

A battery-powered RF sensor is provided for use in security and alarm systems for monitoring alarm state conditions, and transmitting an alarm state detection signal upon detection of an alarm state condition. The RF sensor is constructed to include an RF transmitting portion, a battery, a low-battery voltage level detection portion and a counter for periodically detecting an output voltage level of the battery, and comparing the voltage level to a first threshold voltage. If the detected battery output voltage level is determined to be less than the first threshold voltage, the low- or depleted-battery state is not immediately reported, but is reported at another time if the low-battery condition persists. That is, the low battery condition would preferably not be reported until daytime hours, other than for a dead battery condition. The reporting control is implemented by use of the low-battery voltage detection portion, which looks to a counter to determine the elapsed time since the low- or depleted-battery condition is detected. If the low-or depleted-battery condition persists until the counter counts down, the condition is automatically reported.

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