A Booklet on the Vibration Database Development Tool using The Proven Method (including Spectral Alarm Bands) (5th Edition) (58 page booklet)
• This widely read paper provides answers to two critical steps in the setup of a condition monitoring database
◦ How to properly specify important spectral parameters for a variety of machinery operating at a wide range of speeds (i.e., frequency range, #FFT lines, #averages, etc.)
◦ How to properly specify the alarm limits for a number of frequency bands that are used to divide up the spectrum frequency span into a series of frequency segments, each of which cover specific frequency locations where certain problems occur (i.e., unbalance, bearing faults, gear problems, blade pass, electrical problems, etc.).
• Properly specified spectral alarm bands allow the analyst the ability not only to detect the presence of such problems, but also give him time to react and take the required corrective measures before potential catastrophic failure.
• These documented methods (which were developed over the past 15 years by implementing a series of predictive maintenance programs on a broad range of machinery) have greatly enhanced the effectiveness of condition monitoring programs by allowing analysts to concentrate their efforts on the machines truly in need of attention.
• This paper will provide examples on how to refine spectral band alarm limits statistically after a number of surveys have been taken.
• It will also help the analyst to determine on which machines to apply narrowband alarms rather than (or in addition to) spectral band alarms.
• The information in this paper can greatly enhance both new and existing condition monitoring programs by ensuring that both the measurement parameters and the alarm levels are properly specified for each of the spectra to be taken.