A booklet on How To Analyze Variable-Speed Machines and include them in a Predictive Maintenance Program (19 page booklet)
• This paper introduces the great importance of "order tracking" and how critical it is needed in order to successfully analyze variable-speed machines.
• Such order tracking is of great importance, whether the machines simply change in speed from one survey to the next; or worse, if the machines literally change in speed while the measurements are being taken.
• This paper uses real-world case histories to illustrate how order tracking can be used to significantly reduce the complexity of analyzing such variable-speed machines.
• It also points out what measurements must be taken if such machinery operates over a wide range of speeds (and therefore, likely passes through one or more resonant amplification ranges).
• The paper likewise covers how to set up proper spectral band alarms and frequency spans on such variable speed machinery.