158 Rockwell Automation Publication 1441-UM001B-EN-P - September 2012
Chapter 5 Collecting and Reviewing Data
Window Type of window to be applied to the waveform measurement prior to
computing the spectrum
Hanning (default), Hamming, Flat Top, Rectangular
Averages Sets the number of individual data sets to be incorporated into the
average calculation.
Numeric value
4 (default)
Overlap The percentage of overlap during the averaging. It can be used to
reduce the total time that it takes to collect the data.
Percentage
Type Sets the type of averaging for the measurement. Spectral (default)
Time Synchronous
Peak Hold
Exponential
Ext Trig Slope The input signal slope to be used for externally triggering the
measurement.
+ve - Defines the trigger event to occur on a rising edge.
-ve - Defines the trigger event to occur on a falling edge.
+ve (default)
-ve
Level The amplitude level for externally triggering the measurement. The
level is a percentage of the trigger full scale range.
Numeric: 0.0 (default)
Bin Zeroing Enables/disables bin zeroing. When set to Off, the bins below the
selected high pass filter are not zeroed. That is, data still appears but
is attenuated by the filter shape.
Set bin zeroing to On when you want to be sure unwanted
frequencies do not affect data. Set bin zeroing to Off when you want
to be aware of the presence of unwanted frequencies.
On (default)
Off
Table 43 - Offroute User Parameters
Parameter Name Description Values/Comments
Window Description
Hanning A general purpose window to use on random type data when frequency resolution is more important than
amplitude accuracy. Use this setting for most of your machinery monitoring activities.
Hamming Another general purpose window with slightly different window characteristics than the Hanning
window.
Flat Top Use this when amplitude accuracy is more important than frequency resolution. In data with closely
spaced peaks, a Flat Top window may smear the peaks together into one wide peak. Use this for
sinusoidal or calibration signals.
Rectangular The Dynamix 2500 data collector does not apply a window. Use this only for transient signals that die out
before the end of the time sample, or for exactly periodic signals within the time sample.
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