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  1. luimonta

    Sidebands of pump rotation harmonics

    vanstoja I find sidebands on the pump bearings Motor shows normal spectra Theoretically a transmission through the baseframe can occur but what I see is not just an increase,it is a creation of sidebands luimont
  2. luimonta

    Sidebands of pump rotation harmonics

    Measuring vibrations on a multistage pump (water pump) I find strong sidebands around rotation harmonics Rotation is close to 3000 rpm (50 Hz) and side bands about +/- 2.5 Hz Pressure fluctuations in the fluid are impossible Any idea about the possible causes of such a phenomenon? Thanks...
  3. luimonta

    Rion SA-77

    I' m looking for a discharge software for my old Rion SA-77 Is it still possible to find (i.e.to buy)it? regards luimont

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