Rockwell Automation Publication 1444-UM001D-EN-P - June 2018 117
Configure the 1444 Dynamic Measurement Module Chapter 3
Channel Type Dynamic (AC)
Input Tag Measurement Type Selections Comment
Tags that require dynamic
measurements can be processed
using any of these Measurement
Types.
Aeroderivative(AV - V) Applies 60 dB/octave low pass (LP) and high pass (HP) filters.
Limits the maximum frequency that the module can measure to
approximately 1665 Hz.
The tracking filter 0 measurement is the gas generator vibration, and
the tracking filter 1 measurement is the power turbine vibration.
X (shaft relative) One eddy current probe, or the eddy current probe that is mounted in
the X-direction for an XY pair.
Applies a -24 dB/octave LP filter.
Y (shaft relative) An eddy current probe that is mounted in the Y direction for an XY pair.
Applies -24 dB/octave filters.
X (shaft relative) – Filtered One eddy current probe, or the eddy current probe that is mounted in
the X- direction for an XY pair.
Applies -24 dB/octave LP and HP filters.
Y (shaft relative) - Filtered One eddy probe, or the eddy current probe that is mounted in the Y-
direction for an XY pair.
Applies a -24 dB/octave LP filter.
Aeroderivative(AV - D) Applies 60 dB/octave LP and HP filters.
Specifies one level of integration (velocity to displacement).
Limits the maximum frequency that the module can measure to
approximately 1665 Hz.
The tracking filter 0 measurement is the gas generator vibration, and
the tracking filter 1 measurement is the power turbine vibration.
absolute vibration (A to A) Non-integrated acceleration measurements.
Applies -24 dB/octave LP and HP filters.
absolute vibration (A to V) Integrated (to velocity) acceleration measurements.
Applies -24 dB/octave LP and HP filters.
absolute vibration (A to D) Double-integrated (to displacement) acceleration measurements.
Applies -24 dB/octave LP and HP filters.
absolute vibration (AV to V) Non-integrated measurements from an integrating (velocity output)
accelerometer.
Applies -24 dB/octave LP and HP filters.
absolute vibration (AV to D) Integrated (to displacement) measurements from an integrating
(velocity output) accelerometer.
Applies -24 dB/octave LP and HP filters.
absolute vibration (V to V) Non-integrated velocity measurements.
Applies -24 dB/octave LP and HP filters.
absolute vibration (V to D) Integrated (to displacement) velocity measurements.
Applies -24 dB/octave LP and HP filters.
Dynamic Pressure Dynamic pressure measurements.
Applies -24 dB/octave LP and HP filters.
AC Current Dynamic current measurements.
Applies -24 dB/octave LP and HP filters.
AC Voltage Dynamic voltage measurements
Applies -24 dB/octave LP and HP filters.
40 kHz absolute vibration (A to A) High frequency acceleration measurement.
Applies -24 dB/octave LP and HP filters.
40 kHz absolute vibration (A to V) High frequency acceleration measurement that is integrated to velocity.
Applies -24 dB/octave LP and HP filters.
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