Rockwell Automation 1440-VAD02-01RA XM-123 Aeroderivative Module - Manual (Page 61)

Publication GMSI10-UM003D-EN-P - May 2010
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Measurement Parameters Overall Measurement Parameters
There are two instances of the overall measurement parameters, one for each
channel. Use these parameters to configure the measurement type and the
filtering performed for each overall measurement.
Low HPF Frequency (EDS File
only) Shows the corner frequency for the Low high pass
filter option.
Medium HPF Frequency (EDS File
only) Shows the corner frequency for the Medium high
pass filter option.
High HPF Frequency (EDS File
only) Shows the corner frequency for the High high pass
filter option.
Very High HPF Frequency (EDS
File only) Shows the corner frequency for the Very High high
pass filter option.
High Pass Filter Sets the high pass filter to apply to the
measurements. The high pass filter is useful in
removing low frequency signal components that
would dominate the signal. The high pass filter
attenuates all frequencies below a defined
frequency. It allows, or passes, frequencies above
the defined frequency. Important: Select the Bypass option
when you want a more accurate
representation of dynamic signals at
low frequencies. This option reduces
the distortion of the waveform at low
frequencies and reduces attenuation
at lower frequencies.
Note: The lowest frequency high pass
filter is not available for integrated
measurements.
Channel Signal Processing Parameters
Parameter Name Description Values/Comments
Overall Measurement Parameters
Parameter Name Description Values/Comments
Signal Detection The measurement (or calculation) performed on the
input signal to produce the Overall Value. See Data
Parameters on page 76.
•
RMS - The Overall Value is the root mean squared
(RMS) signal level of the input signal.
•
Calculated Peak - The Overall Value is the
measured RMS value multiplied by the square root
of two (1.4142).
•
Calculated Peak-to-Peak - The Overall Value is
the measured RMS value multiplied by two times
the square root of two (2.8284).
•
True Peak - The Overall Value is the output of a
peak detector applied to the input signal.
•
True Peak-to-Peak - The Overall Value is the
output of a peak-to-peak detector applied to the
input signal.
Options: RMS
Calculated Peak
Calculated Peak-to-Peak
True Peak
True Peak-to-Peak
Important: When changing the signal
detection, make certain to check the
Overall Time Constant value.