Voices: McMillan & Weiner

The ins and outs of safety instrumented systems—part 1

Familiarity with SIS starts with an understanding of reliability, redundancy, integrity levels and testing.

By Greg McMillan and Stan Weiner, PE
Mar 1, 2016

*Greg:* Stan and I developed Monsanto’s Interlock Guidelines. My main contribution was outlining the logic to determine the principle root cause effect so detection and prevention of abnormal conditions could be more effectively focused. Eliminating the distraction of secondary effects and my emphasis on the middle selection of three measurements were, for me, the key to improving diagnostics and reducing the cost, complexity and possible number of false trips.

Read More