Goble, W.

exida LLC, Sellersville, Pennsylvania

HP Automation Safety: All failures are systematic

Goble, W., exida LLC

      For many years, a debate has been ongoing over random vs. systematic failures. Why all the fuss? In functional safety work, one must treat "systematic" failures very differently f..

HP Automation Safety: IEC 61511 – Momentum for change in 2007

Goble, W., exida LLC

Many good things are happening in the world of functional safety. At the top of the list is the acceptance and adoption of IEC 61511 by companies of the hydrocarbon processing industries. ANSI – ..

HP Automation Safety: Required: competent personnel

Goble, W., exida LLC

The ANSI ISA 94.00.01-2004 (IEC 61511 Mod) standard has a clear statement about personnel competency. It says, "Persons, departments or organizations involved in safety life cycle activities shall be ..

HP Automation Safety: Fieldbus in safety applications

Goble, W., exida LLC

Many engineers remember the original ISA S84.01 safety standard of 1996, which stated, "As new technology evolves and becomes available (e.g., ISA SP50 Fieldbus), it will be addressed in future versio..

HP Automation Safety: Who or what is TÜV?

Goble, W., exida LLC

As most individuals involved with automation/ safety systems, I have a few questions: Who is TÜV? What does this name mean? Why is TÜV mostly associated with functional safety certificates f..

HP Automation Safety: What about the valve?

Goble, W., exida LLC

For a long time, the focus of safety instrumented system design has been on the logic solver. For many, including myself, this started when I first heard about a "certified" safety programmable logic ..

Selecting instrumentation for safety instrumented system applications

Goble, W., exida LLC

Follow these guidelines for the most effective and economical installations

HP Automation Safety: IEC 61508 Certification: a standard for all instruments

Goble, W., exida LLC

Recently, I saw a magazine advertisement; it was a common Ogilvy style with the headline "Safety Is Not An Option." This ad was very eye catching for anyone involved in the design and implementation o..

HP Automation Safety: Separation between control and safety

Goble, W., exida LLC

It is pleasure to see that the new ANSI/ISA 84.00.01-2004 (IEC 61511+) standard has been issued. It replaces the now obsolete ISA 84.01-1996. This standard is word-for-word identical to IEC 61511 exce..

HP Automation Safety: CFSE update

Goble, W., exida LLC

In IEC61508, the international standard for functional safety, there are requirements for "Competence of Persons." The general statement from IEC61508 Part 1, Appendix B, reads, "All persons involved ..