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4-10
Results
TrendingSpectrum
(Trending values are given in the lower
window pane)
Comparing trending values
with Reference / Historic data
Trending value
Info / Trending values (in the TrendingSpectrum only)
A TrendingSpectrum contains, in addition to the time waveform and
the corresponding spectrum, up to 30 characteristic overall values.
The overall values are formed using frequency bands that are set up
in the OMNITREND PC software.
The following trending parameters are provided in the lower pane:
- Name and current trending value,
- Limits of the frequency band ('Start' / 'End'),
- Measurement type (e.g. 'True 0-peak'),
- Measurement quantity (e.g. 'Velocity') and, threshold values.
Comparing trending values with reference values:
• Activate the lower window pane using the F key.
• Press the MENU key and click on 'Compare with reference'.
A table appears that contains the trending values, the current
measurement values and - if set up - the reference values.
Comparing trending values with historical values:
• In the lower window pane press the MENU key and click on
'History'. A diagram appears in which the historical and current
measurement values are visible as a trend.
Info / Trending bars (in the Trending Spectrum only)
The bar display in the Trending Spectrum visualizes the position of
the configured thresholds for the current reading (see next page).
Info / Time waveform
The signal can be shown in the lower pane for test purposes (see
P. 4-8). The Zoom function is available for signal evaluation (see P.
4-4).
Info / Cursor
Enable the 'Cursor' option when working with the harmonic/
subharmonic cursor or with the sideband cursor.
Left:
Right:
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