/community-hubs/deltav-community-connect/b/safety-weblog/posts/simplifying-safety-valve-proof-testingA safety instrumented function (SIF) within a safety instrumented system (SIS) consists of a sensor, logic solver, and final element. As part of the IEC 61511 global safety standard, these elements within the SIF must be tested during the operationalen-USTelligent Community 13