© PCE Instruments
57
9.2
RPM
This menu can be used to set how a machine speed and its harmonics are displayed as auxiliary
lines in the spectrum. To do this, the RPM and the desired number of harmonics must first be set.
The first harmonic represents the fundamental frequency. Up to 11 harmonics can be selected
w hich are displayed in the zoom spectrum as red dashed lines and numbered accordingly.
If the function "Show harmonics" is activated, the harmonics w ith the parameters set here are
displayed in the zoom spectrum as red dashed lines with numbering during the FFT analysis. This
function can also be used to quickly deactivate the display w ithout having to change the RPM
settings.
Fig. 42 Display of harmonics
9.3
Memory
The current spectrum can be saved by pressing the
OK
key. Saving is confirmed by a message
at the bottom of the screen indicating the time for identification. If a machine speed has been
entered, this is also saved and displayed in the statistics field after the transfer w ith the PC
softw are.
Saved spectra can be review ed via the
Display data
menu. The display and operation are identical
to a regular live measurement.
The measurements can either be removed individually w ith
Delete data
or completely with
Delete
all
.
10 RPM measurement (PCE-VT 3900 only)
With this function, the maximum amplitude of the vibration velocity in the measured vibration
signal is determined and the corresponding frequency is displayed as RPM and in Hz.
Note
Faulty measurements may occur if there are any interfering factors in the signal at other
frequencies.
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Содержание PCE-VT 3800
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