The new and updated version of the ISA-18.2 standard (ANSI/ISA-18.2-2016, Management of Alarm Systems for the Process Industries) has now been officially released. This supersedes the original edition (2009). The new version incorporates feedback from 6+ years in the "field" and includes some updates based on the IEC 62682 international standard.
Selected highlights include:
- Updated definition of an alarm:
Alarm: audible and/or visible means of indicating to the operator an equipment malfunction, process deviation, or abnormal condition requiring a timely response.
Note that the word “timely” was added making it consistent with the IEC 62682 international Standard.
2. Required / Recommended Content for an Alarm Philosophy Document
The table belows shows the differences between the new ISA-18.2 standar and its predecessors.
We are happy to say that the last three topics were recommended for addition by the exida team and were accepted by the ISA-18 committee. These ideas originated from our experience helping end users develop alarm philosophy documents.
3. Alarm Shelving is now Required Functionality for a Control System!