Amplitude/Phase Measurement - FAG Detector III User Manual

6.10 Amplitude/phase measurement

Background
Experienced users can use the amplitude/phase measurement to determine
changes in the stiffness of a component that are caused by structural breakage in
the material, for example. To do this, you first use the Detector to perform vibration
measurements at different points along the component. After transferring to the
data to the Trendline software you can then analyze the amplitude/phase graph to
determine whether there are any changes in stiffness. For example, if the phase
jumps 180° from one measuring point to the next, this indicates structural
breakage between the two points. If, however, the phase values of the particular
measurement are not significant, this generally means that there is only an
imbalance running down the length of the entire component.
If you have discovered a "critical" spot, you can narrow it down by performing
additional measurements between the two originally measured points. In this
way you can "feel out" the damages of components step by step.
Conditions
Balancing must be enabled on the Detector (see "Balancing activation"
Other notes
The number of measuring points is limited to 255.
Starting the amplitude/phase measurement
Select the Amplitude/Phase menu item in the Detector.
Select the measuring point with the RFID Reader or manually (see "Selection
of measuring point
The Amplitude/Phase menu is displayed.
New measuring point
Attach the sensor to the point provided for this purpose.
Name of the measuring point: The Detector suggests the names specified in
the Trendline software (see "Setting up the amplitude/phase configuration"
and adds a space and consecutively increasing number to these (e.g. "MP 1).
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