Rockwell Automation 1440-VSE02-01RA XM-122 gSE Vibration Module - Manual (Page 74)

Publication GMSI10-UM013D-EN-P - May 2010
64 Configuration Parameters
Sum Harmonics Measurement Parameter
There are two instances of the sum harmonics parameter, one for each
channel. .
Overall Damping Factor This parameter is used in conjunction with the
Overall Time Constant to vary the characteristics
of the response of the digital filter used in
calculating the Overall Value.
An Overall Value for a measurement with a damping
factor near 1.0 (critical damping) will slowly rise or
fall for the full settling time specified by the Overall
Time Constant before reaching the final value. An
Overall Value for a measurement with a damping
factor near 0.707 will rise or fall quickly and may
"overshoot" (measure a value greater or less than the
final value) before reaching the final value for a
given input signal.
Enter a value from 0.707 to 1.0.
Overall Filter The filter to be applied to the overall measurement
to produce the Overall Value. See Data Parameters
on page 89. Options: None
Low Pass Filter
Low Pass Filter Sets the frequency above which the input signal will
be significantly attenuated. Enter a value from 200 to 20,000 Hz.
Note: This value is used only when
the Overall Filter is set to "Low Pass
Filter." However, the value is ignored
when double integration is performed
on the signal (Eng. Units is set to "g"
and Output Data Units is set to
either "mils" or "µm").
Overall Measurement Parameters
Parameter Name Description Values/Comments
IMPORTANT
The sum harmonics measurement requires the tachometer
to be enabled (Pulses Per Revolution is set to 1 or more),
and a tachometer signal must be present.
Sum Harmonics Measurement Parameters
Parameter Name Description Values/Comments
Sets the starting order for the Sum Harmonics
measurement. The amplitudes of all harmonics from
the specified harmonic through FMAX are included in
the sum. Select a value from 1 to 5.
Note: This value should be less than
or equal to the FMAX in orders. The
sum harmonics start order is
automatically rounded down if this
value is above the FMAX.
XM Configuration
Utility EDS File
Order of Sum
Harmonics Sum
Harmonics
Start Order