/community-hubs/deltav-community-connect/b/safety-weblog/posts/reducing-level-detector-proof-testing-complexity-1332017530Each safety instrumented function (SIF) including its sensor, logic solver and final control element must be periodically tested to make sure it will perform as designed in the event of a safety demand. These “proof tests” help to uncover and failureen-USTelligent Community 13