What is the primary purpose of a pressure supervisory signal in fire protection systems?

The primary purpose of a pressure supervisory signal in fire protection systems is to monitor pressure changes within the system. This is essential to ensure that the fire protection system, such as fire sprinklers, is functioning properly and can respond effectively in the event of a fire.

Monitoring the pressure allows for the detection of issues such as leaks or valve malfunctions that could compromise the system's ability to deliver water when needed. An adequate pressure level is crucial for the sprinklers to operate effectively and provides assurance that the system is prepared for emergency situations.

While other aspects, like indicating normal operation or triggering alarms, are also important features of fire protection systems, they serve different functions than monitoring pressure specifically. System tests are typically conducted separately to ensure that all components are functioning as designed, rather than being directly related to the pressure supervisory signal's main role.