Three things must be checked when verifying that a given Safety Instrumented Function (SIF) design meets a Safety Integrity Level (SIL). These are:
· Systematic Capability or Prior Use Justification for each device meets the SIL level of the SIF
· Architecture Constraints (minimum redundancy requirements) are met
· A PFDavg calculation result is within the range of numbers given for the SIL level
A PFDavg calculation is the most common and perhaps the most important of the three performance metrics. A proper PFDavg calculation should be done based on a number of variables.
This web seminar will describe how all of these variables impact the PFDavg calculation and show the importance of each variable. The overall impact will be shown to be up to two SIL levels!
The Certified Functional Safety Expert (CFSE) Program has introduced a new Automotive Safety Applications specialty. The Automotive Safety Applications program applies to personnel who implement safety related systems in automotive applications. This specialty also focuses on the understanding and proper application of the ISO 26262 standard, as well as relevant…
exida, a global supplier of functional safety products, services, and certifications has released the second version of its SILStat™ software. SILStat helps evaluate actual risk reduction by collecting and analyzing operation and maintenance data. “SILStat v2 improves the scalability of the software rollout through a standalone (Lite) and Server based…
We are pleased to announce the products chosen as recipients of the 2014 exida Safety Awards. exida recognizes the importance of excellence in functional safety, and through extensive analysis of the nominated products, we are confident that the chosen products best exemplify innovation and novelty. About the Products: Sensor Category…
IEC 61508 in the Safety Automation Equipment List
IEC 61508 in the Safety Automation Equipment List
In honor of the upcoming “Talk Like a Pirate” Day on September 19, I offer this lighthearted look at PIU assessment. Captain (C) “Ahoy me bucko! We be attemptin’ to get our transmitter design certified. It’s been shippin’ fer a few years now. We don’t got a lot of whatcha…
exida, the global leader in functional safety certification for the process industries, has certified the Rosemount Tank Gauging System from Emerson for functional safety, ensuring that it meets the functional safety requirements for Safety Integrity Level (SIL) 3 capability per IEC 61508: 2010. “Emerson has clearly demonstrated a very high…
The Failure Modes, Effects and Diagnostic Analysis (FMEDA) methodology was created in the late 1980s by engineers at exida in response to the need to obtain precise numbers for diagnostic coverage factors in programmable electronic systems. exida has continued to develop the method over the last 25 years into a technique that can predict failure rates, failure modes, and useful life for devices that contain electronic and/or mechanical components. The accuracy of the FMEDA prediction depends on the component database used in the FMEDA. The exida Electrical & Mechanical Component Reliability Handbook was developed using over 100 billion unit hours of field failure data from several different environments. This webinar will describe in some detail the FMEDA process and the field data comparison process.
IEC 61508 in the Safety Automation Equipment List
IEC 61508 in the Safety Automation Equipment List
This webinar describes the benefits of selecting IEC 61508 certified equipment for safety application in the process industries. The process used to certify both a simple device and smart, complex devices will be explained, as well as an in-depth description of the contents and information on the certificate. The webinar will also cover the benefits and limitations of a certification. Anyone wanting to understand the benefits of using certified equipment, or are interested in getting their devices certified should attend.
exida will be exhibiting and presenting at the 2014 Emerson Global User Exchange October 6-10, 2014 in Orlando, FL. Stop by Booth #323 during exhibit hours. Also, Dr. William Goble, Principal Partner and Todd Stauffer, exida Director of Alarm Management are among the presenters at this year’s event. Please see…
exida, a global supplier of functional and process safety products, services, and certifications has released CyberPHAx™, a tool that allows users to effectively conduct a Cyber Risk Assessment to identify potential cyber-attacks and to document existing or planned countermeasures to estimate residual risk of a cyber-attack. “We live in an…
IEC 61508 in the Safety Automation Equipment List
IEC 61508 in the Safety Automation Equipment List
IEC 61508 in the Safety Automation Equipment List
Alarms were originally shown on Piping and Instrumentation Diagrams / Drawings (P&IDs) to document hardware requirements for installation in a (panelboard) control room. This was important because there was limited real estate in the control room for the alarms (displayed on Panalarms and light boxes) and there was a real…
Have a formal process for tracking, recording, and classifying field shipments and failure returns. If your product was designed well in the first place, even if strict adherence to IEC 61508 was not followed, your field failure rate should be pretty low. Using Proven-In-Use (PIU) methodology will allow an assessor…
Loren Stewart, exida Safety Engineer, authored an article for the Summer 2014 issue of Valve Magazine . The article is titled “Evaluating and Proving SIS Safety Levels.” “Because the equipment used in a safety instrumented system 〈SIS〉 application has a critical job, such equipment must be carefully evaluated and justified.…