What is the difference between overall vibration level and spectral analysis in a condition monitoring program?
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A
Overall level measures low-frequency vibration only; spectral analysis covers high frequencies
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B
Overall level provides a single severity value for trending; spectral analysis identifies the frequency and source of vibration components for diagnostics
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C
Overall level is measured with proximity probes; spectral analysis requires accelerometers
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D
Overall level uses velocity; spectral analysis always uses acceleration