PCE Instruments PCE-VT 3900 Bedienungsanleitung Seite 49

5.4.2 Display data
This menu is used to display saved readings from the measuring spots of a route. The navigation
has a tree structure and the order is identical to the route configuration when created with the PC
software.
5.4.3 Delete all
Via this menu item, all measured values from the respective measuring spots of all routes can be
deleted. The routes themselves will remain.
5.5 FFT (PCE-VT 3900 only)
In this menu, the FFT function can be started and saved FFT spectra can be displayed and
deleted.
5.5.1 FFT acceleration / FFT velocity
The spectrum can be displayed either for the vibration acceleration or for the vibration velocity.
5.5.2 RPM
With the help of this function, a machine revolution speed can be entered. This value is saved
when a spectrum is saved and is also displayed after the transfer to the PC software.
In addition, the integer harmonics of the entered machine speed can be displayed in the spectrum
for orientation. The number of harmonics to be displayed can be set from 1 (machine speed only)
to a maximum of 11.
If the function "Show harmonics" is activated in the meter, the harmonics with the parameters set
here are displayed in the zoom spectrum as red dashed lines with numbering during the FFT
analysis.
5.5.3 Display data
With the help of this function, saved FFT spectra can be viewed again.
5.5.4 Delete data / Delete all
These two menu items can be used to delete individual FFT spectra or all saved spectra at a time.
5.6 RPM measurement (PCE-VT 3900 only)
Via this menu item, the RPM measurement can be started. This function has no further settings.
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