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Table 14 - Instrument Configuration Parameters
Parameter
Description
Freq. Units
The frequency units for displaying spectra/FFT data in the
data collector.
This parameter is initially set to the default frequency (Hz or
CPM) in Emonitor when you load a list.
Fast
Sets the averaging display and overlap processing.
Averaging
Value
On
Off
Rockwell Automation Publication 1441-UM001B-EN-P - September 2012
The Instrument Configuration screen appears.
4. Review the default values and edit if necessary.
Use the descriptions in
to help you configure the data collection options.
5. When you are finished, press F4 (Apply) to return to the Data Collection
screen.
Description
Default
The display is updated only when the data collector has collected and averaged all the data.
For example, if the number of averages is set to `20,' then data is displayed only when 20 blocks have
been collected and averaged. There is no progress indication during data collection, only a `Collecting
data...' message.
This speeds up the data collection of the spectra using the percent overlap specified in Emonitor. The
interim averages are not displayed.
The display is updated as often as possible while the data collector is collecting and averaging the
data. For example, if the number of averages is set to `20' then data might be displayed for averages
1, 6, 12, 18, and 20. The averages that are displayed depends on the Fmax and number of lines
selected. If each block is acquired very quickly then only the first and last updates may be seen. Data
can be stored at any time once the spectrum has been displayed.
Important: The Off option applies only to spectral averaging, not time synchronous averaging. This
means it has no effect on Phase points or other time synchronous averaged measurements.
Configuring the Dynamic 2500 Data Collector
Instrument Configuration Parameters on page 59
Value
Hz: displays spectra in Hertz, cycles per second.
CPM (default): displays spectra in cycles per minute.
Orders: spectra in orders of the operating speed.
This is used only when order normalized or phase data is
collected using a tachometer or strobe to trigger data
collection.
Chapter 2
59
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