Casing Vibration - SKF Multilog On-Line System IMx-M User Manual

Protection
Measurement Types
Therefore, to determine the absolute shaft displacement, what must be done is to
attach both a velocity sensor and a shaft displacement probe to the machine being
analyzed, then either sum or subtract the returned displacement values (see figure
below).

Casing Vibration

Casing vibration is used for measuring vibration on machines such as gears, pumps,
fans, and motors equipped with rolling element bearings (API670 definition).
2 - 6
Figure 2 - 4.
Measuring the Vibration of the Shaft Relative to the Machine.
Figure 2 - 5.
Determining the Absolute Shaft Vibration.
SKF Multilog On-Line System IMx-M
User Manual