Instrumentation Specialist Interview Question:

Explain me where should we use “ Open to alarm “ and “Close to alarm “?

Submitted by: Muhammad

A) Where probability of an open circuit fault is higher we use “open to alarm” and where probability of a closed circuit fault is higher we use “close to alarm” strategy. “Open to alarm” strategy is usually preferred.
B) Selection should be such that whenever component/ instrument/ system fault occurs, system should give alarm.
Submitted by: Muhammad