Statistical condition monitoring tool

Abstract

The crucial parameters for the effectiveness of a CM system are the threshold values that define when a specific alarm is to be raised. Usually, the specification of the threshold values is performed during the commissioning phase of a new system or tuned after a maintenance activity. Improperly tuned threshold values may result either in an excessive number of false alarms, or in a reduced sensitivity of the CM system to deviant conditions (i.e., faults). From the point of view of the user (or control system), having either too high of an alarm rate or missed alarms reduces the reliability of the CM system.