AADvance Safety Manual - Tuv-fs.com

AADvance Safety ManualRecords shall be maintained throughout the commissioning process. These recordsshall include evidence of the tests completed, any problem reports and the resolutionof problems.Safety System ValidationSafety system validation shall test the integrated system to ensure compliance with thesafety requirements specification at the intended safety requirements class. Thevalidation activities should include those necessary to prove that the systemimplements the safety actions during normal start-up and shutdown and underabnormal fault modes.The validation shall confirm that each functional safety requirement has beenimplemented at the specified safety integrity level, and that the realization of thefunction achieves its performance criteria, specifically that the process safety timerequirements have been met.The validation shall also consider the potential external common cause failures (powersources and environmental conditions) and ensure that the system will provide fail-safeoperation when these conditions exceeded its design capabilities.Operation and Maintenance PlanThe provision of an Operation and Maintenance Plan ensures that functional safety canbe maintained beyond the commissioning of the system. The in-service operation andmaintenance is normally outside the responsibility of the system integrator, but thesystem integrator can provide guidance and procedures to ensure that the persons ororganizations responsible for operation and maintenance can ensure the systemoperates to the specified safety levels.The Operating and Maintenance Plan shall include the following items: Clear definitions of power up and down sequences. These definitions shall ensurethat the sequences cannot result in periods when the system is unable to respondsafely whilst a hazard may be present. The procedures for re-calibrating sensors and actuators. The recommendedcalibration periods shall also be included. The procedures for periodically testing the system, together with definitions of themaximum intervals between testing. Definitions of the overrides to be applied to be able to carry maintenance of thesensors and actuators. The procedures for maintaining system security.3-6 Document number 553630 Issue 7: February 2010