Protection
Measurement Types
2 - 6
SKF Multilog On-Line System IMx-M
User Manual
Figure 2 - 4.
Measuring the Vibration of the Shaft Relative to the Machine.
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).
Figure 2 - 5.
Determining the Absolute Shaft Vibration.
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).