Rockwell Automation 1440-VSE02-01RA XM-122 gSE Vibration Module - Manual (Page 72)

Publication GMSI10-UM013D-EN-P - May 2010
62 Configuration Parameters
Sampling Mode Sets the sampling mode.
The sampling mode determines whether the signal is
synchronized with the tachometer signal and has
several effects on the resulting measurements.
Options: Asynchronous
Synchronous
Note: Synchronous sampling requires
a tachometer signal.
Internal Gear Teeth The number of teeth on the buried shaft gear. Note: These parameters apply only to
synchronous sampling.
External Gear Teeth The number of teeth on the external shaft gear.
Channel Signal Processing Parameters
Parameter Name Description Values/Comments
Asynchronous Sampling Synchronous Sampling
The waveform measurement is
time-based. The waveform measurement is
position-based.
The spectrum measurement is
frequency-based. The spectrum measurement is
order-based and the Number of
Lines must be evenly divisible by
FMAX (i.e. no remainder).
When averaging, spectrums are
averaged, not waveforms. This has
the affect of reducing noise in the
spectrum data. When averaging, waveforms are
averaged and the spectrums are
calculated from averaged waveforms.
This has the affect of removing
non-synchronous frequencies from the
waveform and spectrum data.
The Band Minimum and Maximum
Frequency must be specified in Hz
(or CPM). The Band Minimum and Maximum
Frequency can be specified in Hz
(CPM) or Orders.
The tachometer speed must meet the
following criteria, otherwise a
tachometer fault will be indicated.
10 Hz < Tach Speed x Gear Ratio* x
FMAX < 5000 Hz
*Gear Ratio
External Gear Teeth
Internal Gear Teeth
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