VMI VIBER X4, Manual, Page: 27 / 58

Vibration Measurement Instruments
Measure (Off Route)
This section describes the applications in the Measurements menu. In this menu the programs are used to
make an analysis on site or when you need to make additional measurements during Route.
The following measurement applications are included in the instrument when delivered.
See the specified application section for a detailed description.
Total value
This application is used for analyzing the effect of mechanical actions and is an easy way to quickly gain an
overview of the vibration status of a machine.
Spectra
This measurement displays a spectrum (chart) of the frequencies at which the machine component is
vibrating and the amplitude of the vibration at each of these frequencies.
Bearing Condition
This application is used for analyzing the effect of lubrication or other actions on journal bearings. The
bearing condition value is a sum average value, the RMS value, of all high frequency vibrations in the set
frequency interval.
Envelope
Envelope is a spectra measurement that enhances the energy in the high frequency signals and is used to
find early signs of bearing faults. Envelope can also be used to detect cavitation in pumps.
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