SPM leonova emerald - Page 128

E
E:6 Vibration measurement
To evaluate a spectrum, you need to know the RPM
of the shaft at the time of vibration measurement.
Mark‘Variablespeed´(1).Thisforcesaspeedmeas-
urement before you can measure the vibration.
‘Timesignalunit‘(2)canbeACC,VELorDISP.
Ontheline‘Save’(3)youdeterminethetypeof
measuring results you want. There are five alterna-
tives.
‘Timesignal(FFTcalculated)’savesthetimesignal
and calculates the FFT.
‘Full spectrum’ returns a 1600 line velocity spectrum.
By default, the range is 2 to 1000 Hz.
‘Peaks’ will save the number of peaks you input under
‘No.ofpeakstosave’(4).Apeakisaspectrumline
with a higher amplitude than the lines on either side
of it. Thus, a 1600 line spectrum can contain max.
800 peaks.
‘Condition parameters’ selects the RMS vibration
values and excludes the spectrum.
‘Time signal and FFT’ saves the time signal and the
calculated FFT.
Theline‘Direction’(5)letsyouselectoneofthe
three measurement directions. Your choice is then
displayed in the measurement window.
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