ared. 3.7Operating Modes The following operating modes are identified for each Safety Instrumented Function: demand/continuous. This shall be stated in each individual SIF specification sheet. 3.8Trip Reset Trip reset requirements will be stated in the individual SIF specification sheets. A trip cannot be manually reset until all initiators are in their healthy (normal operation) condition. 3.9Mission Time The mission time (or system lifetime) shall be 15 years. 3.10Response Time The response time of plete SIF will be from detection at the sensor pletion of final element action and shall not exceed half of the process safety time for the specific incident scenario the SIF is guarding against.3.11Test Interval ponent of the SIF may be tested separately according to its proof test interval.
全文预览
