Standard Guide for Statistically Evaluating Measurand Alarm Limits when Using Oil Analysis to Monitor Equipment and Oil for Fitness and Contamination

Importancia y uso:

5.1 Alarm limits are used extensively for condition monitoring using data from in-service lubricant sample test results. There are many bases for initially choosing values for these alarm limits. There are many questions that should be addressed. These include:

Are those limits right or wrong?

Are there too many false positive or false negative results?

Are they practical?

5.2 This guide teaches statistical techniques for evaluating whether alarm limits are meaningful and if they are reasonable for flagging problems requiring immediate or future action.

5.3 This guide is intended to increase the consistency, usefulness, and dependability of condition based action recommendations by providing machinery maintenance and monitoring personnel with a meaningful and practical way to evaluate alarm limits to aid the interpretation of monitoring machinery and oil condition as well as lubricant system contamination data.

Subcomité:

D02.96.04

Referida por:

D8120-17, D8127-23, D7874-13R22, D7669-20, D6224-23, D7889-21, D4378-24, D8004-23, D7919-14R21, D7898-14R20, D8184-18E01, D8182-18, D8323-24, D8506-23, D8004-23, E3242-23, E3382-24, D7917-14R18

Volúmen:

05.04

Número ICS:

25.040.40 (Industrial process measurement and control)

Palabras clave:

alarm; alarm level; alarm limit; condition monitoring; control limit; cumulative distribution; equipment population; measurand; measurand set; nonparametric; oil analysis; parametric; SPC; statistical process control;