Measurement-computing Medallion Rotate rev.2.3 Manual do Utilizador descarregar pdf (Página 46)

Medallion Rotate Manual October 2000

RPM (MACHINE SPEED) PLOTS

The plot below shows two RPM curves that display the instantaneous

speed of a machine. You create these curves by performing a Tachometer

analysis on a tachometer or other machine speed signal. See “Processing a

Tachometer Signal.” Medallion Rotate Plus can also create RPM curves without

a tachometer from a Waterfall plot of a data channel. See “RPM from Waterfall.”

To display calculated RPM files, do one of the following:

• You can display a calculated Raw RPM (rpm*.raw file) curve or a

Smooth RPM (smoothrpm*.spl)

curve by right-clicking the

channel in the Channel List

window an choosing Plot.

• You can display both curves

together (as shown above) by

selecting both channels, then right-clicking one and choosing Plot.

WATERFALL PLOT

The Waterfall plot displays multiple spectra as a function of position. You

create a Waterfall plot by performing a Waterfall analysis on data signal, or on

the combination of a data and a machine speed signal. See “Waterfall

Analysis.”

The Waterfall plot also shows an amplitude plot for the “slice” under the

cursor. You can display a waterfall by

right-clicking the waterfall file in the

Channel List window and choosing

Plot.

Hint: Medallion Rotate needs the

smoothed RPM file to display

the waterfall in orders.

• Select both the Waterfall (waterfall*.wat) and the Smooth RPM

(smoothrpm*.spl) channels in the Channel List window. Then right-click

one and choose Plot.

• If you have already displayed a Waterfall plot, you can drag and drop

the Smooth RPM (smoothrpm*.spl) channel from the Channel List

window onto the Waterfall plot. Medallion Rotate recalculates the

waterfall using the smoothed speed curve.

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Measurement-computing Medallion Rotate rev.2.3 Manual do Utilizador Página 46