Posts Tagged ‘safety instrumented system’

Flame and Gas Detection in Layers of Protection

Posted in Analyzers, Safety on Friday, June 8th, 2018. No comments yet
Tags: , , , , ,

For manufacturing processes with hazardous substances that are combustible or can cause harm to people and property, flame and gas detection systems are often used as part of the risk mitigation strategy. This 11-minute video, Rosemount Flame and Gas Layers of Protection describes how these sensors are used in layers of protection for the process […]

Filling Gaps in Global Safety Standards

Posted in Final Control Element, Safety on Thursday, May 3rd, 2018. No comments yet
Tags: , , , , ,

A safety instrumented function (SIF)’s purpose is to reduce the risk of a specific hazard. For example, an upset condition in an oil and gas production separator may cause a series of SIFs within a safety instrumented system (SIS) to shut in the wells feeding the separator. A SIF contains a sensor, logic solver and […]

Vortex Flow Meters in Safety Instrumented Functions

Posted in Flow, Safety on Wednesday, December 20th, 2017. No comments yet
Tags: , , , ,

Safety instrumented systems provide a layer of protection beyond the control system to safely shutdown the process during abnormal situations. A safety instrumented function (SIF) or “safety loop” includes the sensing device, logic solver and final control element to perform safety function upon demand. Flow measurement devices are often the sensing devices in these SIFs. […]

Proof Testing Level Measurement Devices

Posted in Level, Safety on Tuesday, August 8th, 2017. No comments yet
Tags: , , , ,

Safety instrumented systems (SIS) include the sensor(s), final control element(s) and logic solver(s) for each of the safety instrumented functions (SIFs) in the SIS. To verify the SIFs are performing the amount of risk reduction intended for their application, they must be periodically proof tested. PCN Europe magazine interviewed Emerson’s Teddy Tzegazeab on how proof […]

Level Sensor Safety Proof Testing

Posted in Level, Safety on Thursday, July 13th, 2017. No comments yet
Tags: , , , , ,

Backing up your computer or server is a waste of time if restoring the backup fails when you need it. Good practice is to test these backups on separate test systems periodically to make sure they restore properly. Similarly, safety instrumented systems (SISs) need to assure that each safety instrumented function (SIF)/safety loop does what […]