VIBTOOL 02.2009
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Vibration measurements
VIBTOOL is the perfect vibration measurement instrument
with a built-in vibration sensor. It uses the same sensor for
vibration measurements as it does for the bearing measure-
ments as described in the relevant chapter.
The vibration severity is measured according to ISO 10816-
3, as well as other international standards which have been
set on the same level.
VIBTOOL fulfills all the known standards for vibration
measurement. The RMS vibration value is an international
measurement unit which shows whether the vibration of a
rotating machine is acceptable.
Besides the built-in sensors, an external sensor can also be
connected to VIBTOOL, e.g. mobile or permanently-
mounted Tandem-Piezo
®
accelerometers. This means diffi-
cult measurement locations are easy to reach.
The combination of shock pulse measurement and vibra-
tion measurement is very helpful when evaluating machine
condition - especially of rotating equipment such as fans
and compressors. See the separately available vibration
handbook (order number VIB 9.443G) for further details
on vibration measurements.
What is meant by vibration severity?
Vibration severity is defined as the RMS level of
vibration velocity, measured over a frequency of 2 to
1000 Hz or 10 to 1000 Hz. Vibration severity is
approximately related to the energy level of machine
vibration, and is thus a good indicator of the destruc-
tive forces acting on the machine.
The vibration severity measurement is a very efficient
monitoring method for detecting such common ma-
chine faults as imbalance, structural weakness, loose
parts, etc. Few input data are needed and it is easy to
apply. The evaluation is based on the international
industrial standard ISO 10816. The measurement re-
turns the RMS value of vibration velocity in mm/s or
inch/s.
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Note
Vibration measurements
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