VMI VIBER X5 MKIII, Instrument Manual, Page: 57 / 121

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7.4. 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.
From the
Main menu select, Measure and Spectra .
Or From Main menu select, Measure, Advanced and Spectra .
The VIBER X5 MkII™ has two applications for Spectra measurement. One regular Spectra
which is located under Measurements, and one Advanced Spectra which is located under
Advanced Measurements .
The Advanced Spectra have more setting possibilities and is suitable for experienced user.
In Advanced Spectra the accusation time may be long due to the user settings, for this
reason auto ranging is made only in the beginning of the measurements. In regular Spectra
auto ranging is being made continuously.
7.4.1. Spectra Measurement Settings
When you select Spectra(or Advanced Spectra), the
instrument will display the setting menu, where the
following parameters can be set:

Measurement type (Acceleration, Velocity,
Displacement or mV)

Show Unit (depending on the measurement type
selected above)

Detection type (RMS, Peak or Peak-Peak)

HP Filter (Hz) (Disabled, 2.0, 3.0, 5.0, 10.0, 20.0)

Max. frequency (Hz) (400, 1600, 3200, 12800, 25600 or 40000*)
*Only available in Advanced Spectra

No of lines (800, 1600, 3200, 6400, 12800* or 25600*).
*Only available in Advanced Spectra

Window (Hanning, Hamming, Blackman, Kaiser-Bessel, Rectangular)

Averaging (Disabled, Linear, Exponential, Peak Hold)

Number of Averages (2, 4, 8, 16, 32 or 64)

Frequency unit (Hz or CPM)

Overlapping (0, 25, 50 or 75%)

Save Waveform with spectra (Enabled, Disabled)
Figure 7-9: Spectra Selection
Figure 7-10: Spectra Settings