- CAP
Summary
CAP question
The purpose of an industrial control system alarm system audit is all of the following except:
A. Identify new points that should be added to the alarm list.
B. Check that the alarm system is meeting the documented alarm system objectives.
C. Ensure that alarm shelving and out-of-service procedures are followed.
D. Verify that alarm monitoring reports are active and up to date.
CAP Answer
The correct answer is A, "Identify new points that should be added to the alarm list."
Answers B, C, and D are all examples of alarm system auditing functions listed in ANSI/ISA-18.02. There are many more tasks that should be performed in an alarm system audit, including verifying that the alarm history is current, verifying that the management of change (MOC) processes have been followed, and verifying that all documented alarms are active and match the master alarm database.
Answer A is not an alarm system auditing function. The identification of points that need to be added to the alarm database begins with a management of change process. The MOC process is used to ensure that candidates for the alarm system meet the documented definition of an alarm (rationalization) and are assigned the proper classification and prioritization in the alarm system.
Reference: Trevathan, Vernon L., A Guide to the Automation Body of Knowledge, Second Edition, ISA, 2006.
Reader Feedback
We want to hear from you! Please send us your comments and questions about this topic to InTechmagazine@isa.org.