VIBTOOL 02.2009
34
The measurement location
The preferred points of measurement are where the vibra-
tion energy is transmitted to VIBTOOL as directly as
possible. For machines which include rotating masses, the
bearings and the mounting points of the machine serve as
ideal points of measurement.
Five simple rules to follow
1. One mechanical interface
Each interruption (or interface) in the material dampens
the signal to be measured. Therefore, the signal path must
contain only one mechanical interface, i.e. that between
the bearing and the bearing housing.
A typical VIBTOOL
measurement location.
The amount of signal loss at
an interface can be
considerable. Welds, for
example, are regarded as
interfaces.
Bearing diagnosis
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