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 Select operation mode
VM-FFT supports several operation modes. The following can be selected:
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FFT with automatic settings according to frequency axis
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The FFT parameter are set automatically. Only the required frequency range is set individually. VM-FFT takes this into account and determines the line density. The time window is set automatically so that each displayed line is verified by a calculated one. The flattop window is used for weighting in time range because it displays magnitudes especially accurate.
Since the selected frequency is a measure for the FFT parameter, the FFT is setup again when the frequency changes.
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FFT with manual settings
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Two additional control panels appear - Trigger and FFT. Numerous parameter for the FFT can be set manually and the FFT can be performed with a trigger if required.
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Envelope analysis for bearing diagnostics
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A third additional control panels appears - Bearing diagnosis. Those settings allow an easy assignment of the displayed frequencies to bearing damages.
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Power spectral density
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For stochastic vibration processes or the impact of vibration with the transport of goods the power spectral density analysis (PSD) is often used. With this mode a matching control panel appears.
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Frequency response function
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A force signal is generated by an impulse hammer. The accelerometer measures the response signal. A number of FRF modes can be selected.
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Acoustics (FFT with weighting filter)
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This mode performs a FFT for acoustic values. A linear, A or C weighting filter can be selected.
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