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VA alarm levels and criticality

VA alarm levels and criticality

VA alarm levels and criticality

(OP)
We started a Pdm program from ground zero with baselines,etc..
We have gathered up to at least 5-8 sets of readings with CSI  RBMWare software.
I am needing some advice as far as how to determine what the alarm levels should be set at and what steps to take to acheive  great results.

RE: VA alarm levels and criticality

   A good source of guidance on statistical vibration alarm settings is:
   Slemp,M.& Skeirik,R.(1999), "Using Statistics to Avoid Vibration False Alarms", P/PM TECHNOLOGY, Feb. 1999, pp. 26-30. The authors are from CSI and tried several methods of alarm settings. They found the best approach to be a combination of the "external alarm envelope method" based on a statistically derived composite spectrum and the "analysis parameter method" This approach was reported to correctly identify 100% of the machines in alarm and to appropriately exclude 93% of the machines not currently exhibiting a fault.

RE: VA alarm levels and criticality

(OP)
Thanks for the info and I will heed your advice and look into the literature suggested by you two.
Hopefully I can start off the day with some progress with these good proven methods.

RE: VA alarm levels and criticality

   An excerpt of the report cited by dgallagher can be found in;
   Berry,J.E.(1990), "How to Specify Machinery Vibration Spectral Alarm Bands", Sound and Vibration, Sept. 1990, pp.16-28.
   This is probably from an earlier edition of the report (which is now in its 4th Edition and costs $69US) and may miss some important information added later. S&V magazine has been offered free to qualified engineers working in acoustics and vibrations for over 30 years.

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