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The DT713-5 is a Class A2 temperature detector with a fixed temperature threshold of 57°C and built in rate-or-rise functionality.
700 Series detectors continually monitor their own sensitivity and operational status. Once a day they perform a full diagnostic test that includes dynamically testing the sensing chamber and internal electronics. Any abnormal statuses are reported locally on a fault LED on the detector, and signalled back to a compatible CIE.