Non-restorable detectors do not have to be tested until 15 years of operation.

Non-restorable detectors do not have to be tested until 15 years of operation.

• A. Immediately After Installation
• B. After 5 Years
• C. Do Not Have to Be Tested Until 15 Years of Operation
• D. Never Need Testing

Answer: (C)

Non-restorable detectors are designed to have a defined end-of-life and are not kept in service by routine repairs. Because their function cannot be restored if they fail, the maintenance approach is to replace them at the end of their listed service life rather than perform ongoing functional testing. If a detector is designated as non-restorable with a 15-year life, the practice is to defer routine functional tests until it reaches that 15‑year point, at which time it should be replaced. This reflects the balance between device reliability and the cost/effort of repeated testing on components that aren’t meant to be repaired. Immediate testing after installation is common for commissioning and to confirm basic operation, but it isn’t the routine testing interval for these devices. Testing at 5 years would be premature given a 15-year life, and saying they never need testing ignores the need to verify system integrity before replacement.

Non-restorable detectors are designed to have a defined end-of-life and are not kept in service by routine repairs. Because their function cannot be restored if they fail, the maintenance approach is to replace them at the end of their listed service life rather than perform ongoing functional testing. If a detector is designated as non-restorable with a 15-year life, the practice is to defer routine functional tests until it reaches that 15‑year point, at which time it should be replaced. This reflects the balance between device reliability and the cost/effort of repeated testing on components that aren’t meant to be repaired.

Immediate testing after installation is common for commissioning and to confirm basic operation, but it isn’t the routine testing interval for these devices. Testing at 5 years would be premature given a 15-year life, and saying they never need testing ignores the need to verify system integrity before replacement.