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VIBXPERT 11.2010
Time-synchronous average (Postprocessing)
If a trigger signal is recorded in addition to the time signal, further
information can be obtained.
For example, the time signal can be determined synchronously with
every rotation of the shaft. In this way, events in the signal that are
synchronous with the RPM are emphasized and stochastic results are
suppressed.
If the measurement locations are on a gearbox, the time signals can
be determined for one rotation using the transmission ratio of the
gearbox.
• Press the MENU key.
• Select ‘Postprocessing’ and click on ‘Timesynchronous average’:
-
If you measured the RPM simultaneously with a trigger sensor,
activate the 'Trigger' option and enter the number of 'Revolutions'
per trigger pulse. Using the ‘Start with trigger’ option, you can
synchronize the time signal using the trigger pulse.
-
If there is no trigger signal, you can simulate it by using a
manually entered RPM value. In this case, the trigger options
described above are deactivated. The RPM value (in Hz) corre-
sponds to a block length in the time signal described by the
relationship f= 1/t.
-
In the ‘Revolutions’ field, you can compensate for any differences
in RPM between the trigger measurement location and the signal
measurement location (e.g. the translation ratio in the gearbox).
Close Postprocessing
• Press the MENU button in the result screen.
• Select ‘Postprocessing’ and click on 'Data'.
Results
Time-synchronous average:
Configuration
Summary of Contents for VIB 5.300 EX Series
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