Which statement best describes the testing of supervision devices in fire protection systems?

• A. They require quarterly testing.
• B. They require annual testing only.
• C. They require biweekly testing.
• D. They require periodic testing per code, often annually, with more frequent checks as mandated by AHJ.

Answer: (D)

Supervision devices are meant to continuously verify the integrity of monitored circuits and components, and to flag any tampering or faults promptly. Because code requirements vary by system and location, there isn’t a single universal interval for testing. The usual rule is to test them periodically according to the applicable fire code and standards, with the Authority Having Jurisdiction able to mandate more frequent checks if the building or risk profile calls for it. This approach ensures that any loss of supervision, tamper condition, or fault is detected quickly and corrected, keeping the system reliable. The other options imply fixed frequencies that don’t account for code mandates or AHJ requirements.