SPM VibChecker - Spectrum Analysis Overview; Viewing the Spectrum Display; Spectrum Zoom Functionality

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Spectrum analysis
The purpose of a spectrum is to reveal line patterns
associated with machine faults. VibChecker generates
an FFT spectrum for pattern recognition.
Spectrum display
To view a spectrum:
1. In the Measurement display (A), press the RIGHT
arrow key.
2. In the display shown next (B), use the UP/DOWN
arrow keys to highlight the ‘Spectrum’ checkbox
and press ENTER.
The Spectrum display (C) shows a bar-type spectrum
with the resolution set up in the Spectrum display (see
the ‘Spectrum resolution settings’ section), compressed
to screen resolution for full view. The spectrum is zoom-
able; see below.
Zoom
The zoom functionality works as follows:
- To zoom in, use the UP arrow key. Please be obser-
vant that the Y scale will change, adapting to the
zoomed-in view.
- To zoom out, use the DOWN arrow key.
- To move the zoom window along the X axis, use the
LEFT/RIGHT arrow keys.
The upper part of the Zoom display shows the RMS
value and frequency of the spectrum line in the centre
of the display, marked with a red cursor.
To return to the Measurement display, press the BACK
key twice.
A
B
C
Center
frequency
RMS value
Zoom in
Zoom out
Move
right
Move
left