Definition:
A Factory Acceptance Test (FAT) is a formal test conducted at the manufacturer’s site to verify that systems and components meet design specifications before shipment. Often applied to control systems but can be applied to mechanical.
For a SIS, this would be a test on all three portions of each SIF: instruments, final elements, and the logic solver.
Expected to be done per the most excellent IEC-62381
Key Points:
- Often includes SIS panels, logic solvers, and critical instrumentation.
- Envisioned to reduce issues during Site Acceptance Test (SAT).
- Often would be a FAT procedure and a report
- For a facility with a SIS, there could be multiple FATs executed. Such as on the Final Elements and then the Logic Solver. It would depend on the complexity and the procurement strategy.
Example:
A FAT verifies that a SIL 2 emergency shutdown panel responds correctly to input simulations.
See also: Site Acceptance Test (SAT), Site Integration Test (SIT)
See also: SAT
Cited Source:
- IEC 61511-1:2016, Clause 14.2.