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Installation and commissioning
February 2023
Figure 4-30: Distance
A. Eddy current sensor PR 642x
B. Distance
Radial clearance (Radial vibration)
Radial vibrations of the machine make measurements of rotational speed more difficult or
even impossible when the amount of the vibration exceeds a critical value. For this reason,
the influence of the radial vibrations should be kept as low as possible. The guide value for
the radial vibration of about 1/10 of the measuring range should not be exceeded.
Example:
A radial vibration amplitude of 200 μm and a measuring range of 2 mm for the PR 6423
leads to a disturbance signal of 1.6 V on the measuring signal (see
Note
In order to avoid negative influences of the radial vibration on the speed measurement,
adjust the sensors so that a maximum signal amplitude is generated (signal limitation on
-21.0 V DC).
58
Operating Manual
MHM-97442
Figure
4-31).
MHM-97442, Rev. 2.06
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