An obscuration cloud generation device (100) comprises a housing (101) having a door (102) and a frame (103) sized and shaped to accommodate an obscuration cloud generating canister (110) when the door (102) is in a closed state. Activation of the canister (110) emits a composition for forming the cloud. The door (102) has an operably open state in which the door (102) is open at least a predefined minimum extent for exiting of the emitted composition. A door checking system (104) applies a force for opening the door (102) and generates an indication of whether the door (102) is open at least to the minimum extent. A controller (105) is adapted to instruct the checking system (104) to apply the force and to receive the indication to determine, before activating the canister (110), that the door (102) is not blocked from reaching the operably open state.

The subject disclosure relates to solutions for testing lighting systems and in particular, for verifying lighting system operability in the event of a power failure. A process of the disclosed technology can include steps for receiving an interrupt command, toggling an interrupt relay in response to the interrupt command, and measuring one or more lighting characteristics of the lighting array to determine if the second power supply can power the lighting array. Systems and machine-readable media are also provided.

The subject disclosure relates to solutions for testing lighting systems and in particular, for verifying lighting system operability in the event of a power failure. A process of the disclosed technology can include steps for receiving an interrupt command, toggling an interrupt relay in response to the interrupt command, and measuring one or more lighting characteristics of the lighting array to determine if the second power supply can power the lighting array. Systems and machine-readable media are also provided.

This disclosure pertains to a system and method configured provide entry check-in protection of a protected premises network including a central alarm monitoring station in communication with a plurality of protected premises, each protected premises comprises a protected premises panel configured to provide entry check-in protection. Protected premises panels include processors and memory configured to provide entry check-in protection comprising receiving an indication of a zone violation of the monitored premises, transmitting a check-in message to the central alarm monitoring station, and transmitting an alert, by the central alarm monitoring station, indicating a destruction of the protected premises panel, upon expiration of the predetermined entry delay period. The check-in message includes a duration corresponding to the entry delay time plus a set period, e.g., one minute.

A system and a memory device including a driver circuit, to perform first operations including driving a resistor-capacitor (RC) sensor circuit of an electronic device to a drive voltage using a representative copy of a current that drives an electronic circuit line of the electronic device. The system and memory device including the RC sensor circuit, coupled to the driver circuit, to perform second operations including determining a first sample voltage by sampling a first representative voltage generated at the RC sensor circuit, and determining a second sample voltage by sampling a second representative voltage generated at the RC sensor circuit. The ratio of the first sample voltage and the second sample voltage is indicative of an RC time constant of the electronic circuit line.

An audio sound is detected. The audio sound is determined to be indicative of a power source of a safety sensor waning. Based on the determination, first light is produced based on a reaction of one or more chemicals with second light from a light emitting diode (LED), wherein the first light supplements the second light.

An audio sound is detected. The audio sound is determined to be indicative of a power source of a safety sensor waning. Based on the determination, first light is produced based on a reaction of one or more chemicals with second light from a light emitting diode (LED), wherein the first light supplements the second light.

A resistor-capacitor (RC) sensor circuit includes an integration capacitor configured to integrate a representative copy of a current that drives an electronic circuit line. The integration capacitor is configured to integrate over a first time period to generate a first representative voltage and over a second time period to generate a second representative voltage. The RC sensor circuit includes a sampling circuit coupled to the integration capacitor and configured to sample the first representative voltage and the second representative voltage. A ratio of the first sampled voltage and the second sampled voltage is indicative of an RC time constant of the electronic circuit line.

Disclosed is a hazard detection system having: a visual alarm device (VAD) including a VAD controller which is an electronic controller, the VAD controller controlling a plurality of implements within the VAD including a light source, and a luminosity sensor with which the VAD controller is configured to perform a VAD health test to confirm that a plurality of parameters of the light source meet or exceed threshold requirements, the plurality of parameters including luminous intensity and luminous profile, wherein the VAD is configured to perform steps including: monitoring for a trigger event to perform the VAD health test, the trigger event including the occurrence of an alarm a condition; activating the light source upon determining that the trigger event has occurred; monitoring the plurality of parameters to determine whether the light source meets or exceeds threshold requirements, and communicating an outcome of the VAD health test.

A control panel for a fire alarm control system is described herein. In some examples, one or more embodiments include a memory and a processor to execute instructions stored in the memory to receive a fault signal from a thermographic detector device, wherein the fault signal corresponds to a fault associated with the thermographic detector device, wherein the fault signal is associated with at least one of a field of view fault, an operating parameter fault, an internal fault, and a transmission fault, and provide a notification of the fault using the fault signal.