Here is what you will find in this edition:
- Ask Doctor SIS: “When did the standard first allow for shared systems…”, by Angela Summers
- “Testing of Safety PLCs”, by Bill Mostia
- SIS-TECH provides the most efficient way to utilize resources
- Follow SIS-TECH on technical events and training calender
Ask Doctor SIS
Angela E. Summers, Ph.D., P.E.
The question: “When did the standard first allow for shared systems, i.e. remove the specific wording that systems must be separate and distinct?” Click here for the answer
Testing of Safety PLCs
William (Bill) L. Mostia, Jr. P.E., FS Engr., Fellow – SIS-TECH Solutions
Some of the confusion about testing may come from a difference of perspective between manufacturer and end user. To the manufacturer, diagnostics are the lifeblood of the logic solver (and the basis for system reliability claims) and any dangerous failures that are not detectable by diagnostics would be classified as “never detected” failures. From the user’s perspective, a manual proof test detects dangerous failures, whether derived from a hardware or software fault. SIS-TECH’s William Mostia discusses the differences in perspective and presents his conclusions. See more
SIS-TECH provides the most efficient way to utilize resources.
A propylene feed system project at a petrochemical plant was over budget. The project team’s engineer contacted SIS-TECH looking for a cost effective solution. See more
SIS-TECH webinar presentation:
Feb. 26, 2014, 1:00 – 3:00 p.m. (CT), Webinar: “Instrument Grounding and Shielding” – William (Bill) L. Mostia Jr., P.E., will present the basic principles of instrument grounding and shielding; providing simple rules for and discussion of what entails a good instrumentation grounding system and how to properly use shielding to minimize the effects of electromagnetic interference (EMI) and radio frequency interference (RFI) on your instrumentation and wiring. Additional information
SIS-TECH offers training:Feb. 3, 2014, Instrumentation Technology – 3 day course will
Feb. 18, 2014, TÜV Rheinland FSEng Training/Certification – 4 day course is designed to provide Technical and Management Professionals with an understanding of the relevant standards, books, and technical reports that define recognized and generally accepted good engineering practice for Safety Instrumented Systems in the Process Industry. Additional information
Mar. 11, 2014, Process Hazard Analysis – 2 day course covers the basic fundamentals of how to facilitate a Process Hazard Analysis (PHA) on operating processes and Management of Change projects. Additional information
Mar. 25, 2014, SIS Implementation – 3 day course covers how risk analysis techniques, such as layer of protection analysis (LOPA), are used to identify the need for administrative and engineered safeguards. The course is designed to provide the student with an understanding of the management system, how to perform LOPA to identify the need for an SIS, how to design the SIS to meet the specified SIL, and how to verify that the SIL can be achieved. Additional information
Apr. 15, 2014, Layers of Protection Analysis (LOPA) – 2 day course discusses the fundamentals of Layer of Protection Analysis, including the risk criteria, key work process elements, and methodology options. Additional information
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