CEMB USA N500 User Manual
Page 83
A rapid guide to interpreting a spectrum
C
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2. TYPICAL SPECTRA OF VIBRATIONS RELATED TO THE MOST
COMMON DEFECTS
Note: The spectra are in an indicative graphic form. The N500 equipment produces a
different form of graph.
The following are the spectra of typical vibrations, caused by the most common defects
found in practical experience.
CPM = shaft rotation speed in rpm
1. UNBALANCE
2. MISALIGNMENT