The invention relates to a water extinguishing system (1) with a fluid supply (20), a pump (30) and a test line (40) with an opening element (2) which is configured to open the test line (40) during a test run of the pump (30). According to the invention, the test line (40) further comprises a closing element (4) which is configured to close the test line (40) if the water extinguishing system (1) is triggered.

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.

Methods and apparatus relating to functional safety critical audio system for autonomous and industrial applications are described. In an embodiment, safety island logic circuitry transmits an enable signal to cause initiation of a functional safety test for an audio component in a vehicle. Audio processing logic circuitry receives the enable signal and causes activation of power amplifier logic circuitry, in response to the enable signal, to drive the audio component in accordance with an audio alert test signal. The audio component includes a Parametric Acoustic Array (PAA) transducer. Other embodiments are also disclosed and claimed.

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.

The RC sensor circuit includes a driver circuit that includes an output configured to drive the RC sensor circuit to a drive voltage using a representative copy of a current that drives an electronic circuit line. The RC sensor circuit includes an integration capacitor. The integration capacitor is configured to integrate the representative copy of the current 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. The sampling circuit is configured to determine a first sample voltage by sampling the first representative voltage and a second sample voltage by sampling the second representative voltage. A ratio of the first sample voltage and the second sample voltage is indicative of an RC time constant of the electronic circuit line.

In an aspect, a fire detection system is described. The first detection system may include isolation circuit having an isolation switch coupled with a system line of the fire detection system and configured to isolate a first side of the system line from a second side of the system line. The isolation circuit may also include a controller coupled with the isolation switch which determines a time delay for determining to isolate the first side from the second side.

The subject disclosure relates to power failure simulations, for example to test lighting systems, such as emergency lighting units or lighted signage. In some aspects, a method of the disclosed technology includes steps for receiving an interrupt command, terminating power delivery from a first power supply to a lighting array in response to the interrupt command, and measuring one or more power characteristics of the second power supply. Methods and machine-readable media are also provided.

The subject disclosure relates to power failure simulations, for example to test lighting systems, such as emergency lighting units or lighted signage. In some aspects, a method of the disclosed technology includes steps for receiving an interrupt command, terminating power delivery from a first power supply to a lighting array in response to the interrupt command, and measuring one or more power characteristics of the second power supply. Methods and machine-readable media are also provided.

The RC sensor circuit includes a driver circuit that includes an output configured to drive the RC sensor circuit to a drive voltage using a representative copy of a current that drives an electronic circuit line. The RC sensor circuit includes an integration capacitor. The integration capacitor is configured to integrate the representative copy of the current 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. The sampling circuit is configured to determine a first sample voltage by sampling the first representative voltage and a second sample voltage by sampling the second representative voltage. A ratio of the first sample voltage and the second sample voltage is indicative of an RC time constant of the electronic circuit line.