I have never read any of trending an eccentricity ratio with a portable data collector from Bently Rack. If it can be, how should it been done??

regards Mario

There is provision for getting average shaft center position in the instrument. Bearing clearance being known ,e=r/c is the eccentricity ratio where c is radial clearance and r is distance between shaft center and bearing center. While measuring vibration , we collect AC and Dc part of vibration. The AC part depicts the vibration and DC part is measured as gap voltage and is the movement of the average shaft center line within the clearance circle and is=r.

Regards
Irshad

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