Rockwell Automation 1441-PEN25-Z Enpac 2500 Data Collector - Manual (Page 44)

44 Rockwell Automation Publication GMSI10-UM002D-EN-E - August 2012
Chapter 1 The Enpac 2500 Data Collector
Table 8 - Instrument Configuration Parameters
Parameter Description Value
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.
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 by
using a tachometer or strobe to trigger data collection.
Fast Averaging Sets the averaging display and overlap processing.
Auto Store Controls the number of key presses required to accept data.
Time The number of seconds that the input signal must be steady for Auto
Store to occur. 2 s (default)
This parameter is used only when Auto Store is set to On.
Percent The fluctuation percent for Auto Store to occur. 30% (default)
This parameter is used only when Auto Store is set to On.
Auto Advance Determines whether the Enpac 2500 automatically moves forward to the next point in the list after collecting data for the current point.
Value Description
On 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 by using the percent overlap specified in Emonitor. The interim averages
are not displayed.
Off 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.
Value Description
On The instrument automatically accepts both the overall and signature measurements and proceeds to the next point in
the list.
The overall measurement is accepted based on an algorithm. The algorithm is based on a percent fluctuation over a
period of time (seconds).
If the overall stays with the % specified by Percent for the number of seconds specified with Time, the overall magnitude
is accepted.
You must press Enter to accept the overall measurement, and then press Enter again to accept the signature
measurement.
Off Default
Value Description
On The instrument automatically moves forward to the next point in the list after
collecting data for the current point. No spectrum is displayed.
Off Default
The instrument displays a spectrum after collecting data for the current point.