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Vibration Diagnostic Guide - EDGE

SKF Reliability Systems Vibration Diagnostic Guide CM5003 Vibration Diagnostic Guide Table of Contents Part 1 Overview .. 1 How To Use This Guide .. 1 Detection vs. Analysis .. 1 Vibration (Amplitude vs. Frequency) .. 1 Overall Vibration .. 2 Time Waveform Analysis .. 5 FFT Spectrum Analysis .. 5 Envelope Detection .. 6 SEE T echnology .. 7 Phase measurement .. 7 High Frequency Detection (HFD) .. 7 Other Sensor Resonant Technologies .. 7 Part 2 Spectrum Analysis Techniques .. 13 Misalignment .. 14 Imbalance .. 16 Looseness .. 18 Bent Shaft .. 19 Bearing Cocked on a Shaft .. 19 Bearing Defect.

vibration severity is to compare the most recent overall reading against previous readings for the same measurement, allowing you to see how the measurement’s vibration values are changing, “trending” over time. This trend comparison between present and past readings is easier to analyze when the values are plotted in a “trend plot”.

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