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Warranty disclaimer
VMI AB warrants the products to be free from defects in material and
workmanship under normal use and service within two years from
the date of purchase and which from our examination shall disclose
to our reasonable satisfaction to be defective.
Warranty claimed products shall be returned prepaid to VMI AB for
service. We reserve the right to repair or to replace defective
products.
Always try to explain the nature of any service problem. At best by
fax, e-mail or letter. Check first all natural problems, like empty
batteries, broken cables, etc. When returning the product, be sure to
indicate that the purpose is to make repairs and indicate the original
date of shipment to you if possible.
General
The VIBER-A is a fully portable broadband vibrometer used in
preventive as well as active maintenance work on rotating
machinery. A complete set comprises an instrument, a vibration
transducer with magnet support and an extension tip.
VIBER-A is measuring the effective velocity (mm/s RMS)
(displacement (µm Peak) or in/s is option) in the frequency range
between 10 and 3200 Hz. This range covers most of the frequencies
that will occur for the majority of mechanical malfunctions and
imperfections. Examples are unbalance, misalignment of shafts and
gears, cavitation and other fluid generated vibrations.
The judgement of the measured levels is greatly supported by
several vibration standards. The close comparison between vibration
levels and actual wear being performed on the machinery will quickly
build up a local knowledge. The experience should be used to
optimise the type of action required when higher vibrations are
found.
A common standard for judgement of vibrations is ISO 10816-3 and
may be available from your domestic standardisation authority. This
standard is an upgrade of older standards that has been in use for
several decades and has a world wide acceptance as a good
judgement for continuos and long lasting operation of machinery. It is
rare that this standard is found to be too restrictive so any reason to
judge vibration with a less exacting judgement should be well backed
by practical experience.
