Vortex flow meter – Understanding it through visuals
Thread Content
Hello everyone. As shown in the figure below, there are two dual-head vortex flow meters with a total of 4 transmitters; 3 of these are connected to the SIS system, while 1 is connected to the DCS system for display. Does this have any impact on the SIL assessment or safety calculations? Or what are the requirements for relevant certificates? Thank you for the reply.
The analysis upstairs is spot-on! A few practical details: It is recommended that the three transmitters connected to the SIS use a two-out-of-three voting logic, which can effectively reduce the likelihood of false operations and better meet the SIL requirements of the safety circuit ； Additionally, attention must be paid to signal isolation between these two types of circuits, in order to prevent conventional signals from the DCS side from interfering with the safety interlock circuits of the SIS ； Finally, for such security-related verification and certification details, it is best to consult qualified third-party agencies or the original manufacturer’s technical support to ensure compliance with relevant security standards.