Easy-Laser E530, Manual

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72
Vibrometer
Bearing condition value
Bearing condition value is used for trend analysis. If the bearing condition value
increases over time, it can be a sign that the bearing is poorly lubricated, overloaded
due to misalignment or has a damaged surface. A high bearing condition value can
however appear in gearboxes, converting machines with cutters and similar machines
without any bearing fault. This is because this type of machinery naturally produces
high frequency vibrations that are similar to the vibrations produced by a machine with
a bearing fault.
The bearing condition value is the quadratic mean, RMS value, of all high frequency
vibrations between 3200 Hz to 20000 Hz. This value is an acceleration average mea -
sured in multiples of the standard gravity constant, g.
The diagram below is only a guide to interpret the bearing condition value. A high
bearing condition value should always be used as a request to make detailed frequency
analysis. Do not change bearings before this is done.
Open tolerance table for bearing condition
1. Select a measurement point.
2. Select
to open the tolerance table.
Line showing rpm.
(Shown only if you have entered rpm.)
Selected
measurement point
Replace
Failing
Fair
Acceptable
Good