Rockwell Automation 1441-PEN25-Z Enpac 2500 Data Collector - Manual (Page 266)

266 Rockwell Automation Publication GMSI10-UM002D-EN-E - August 2012
Chapter 10 Run Up/Coast Down Application
Spacing Controls the spacing between collected spectra.
• Delta RPM- A fixed speed change between spectra.
• % Delta RPM- A percentage speed change between spectra.
• Delta Time- A fixed time interval between spectra.
• Delta RPM+Delta Time- A combination of speed and time interval
settings. If speed stops changing then spectra are calculated using
the Time Interval value.
• % Delta RPM+Delta Time- A combination of speed and time
interval settings. If speed stops changing then spectra are
calculated using the Time Interval value.
Options:
Delta RPM
% Delta RPM
Delta Time
Delta RPM+Delta Time
% Delta RPM+Delta Time
Your selection affects the Speed Interval and Time
Interval settings.
Speed Interval (RPM) Sets the speed interval used in calculating FFT spectra. 1…240 RPM or % RPM
This parameter not used when Spacing is set to
`Delta Time.‘
Time Interval (sec) Sets the time interval used in calculating FFT spectra. .001…604800 seconds
This parameter is not used when Spacing is set to
`Delta RPM‘ and ‘% Delta RPM.‘
Display Units Sets the Y-axis units. The available units depends on the transducer
used to collect data.
See Table 44 on page 258 .
LF Cutoff Determines whether to apply a low frequency filter (0.3 times the
running speed) to the data. Options:
Off
On
Detection Sets the signal detection and scaling display for the plot.
• Peak - Measured RMS value multiplied by the square root of two
(1.4142).
• Pk-Pk - Measured RMS value multiplied by two times the square
root of two (2.8284).
• RMS - Root mean squared signal level of the input signal.
Options:
RMS
Peak
PkPk
Num Traces Sets the number of traces or order tracks to be displayed on the plot. Options:
1
2
3
4
Your selection determines the available number of
Trace Order parameters.
Trace Order #1-#4 The order numbers to be tracked and displayed on the plot. .001…166 orders
This value cannot exceed the Max No Orders value
set in the RUCD Setup screen.
See Table 44 on page 258 .
Table 47 - Nyquist Plot Parameters
Parameter Name Description Values/Comments