HUMAN VIBRATION ANALYSER
PROVIDES ALL DATA REQUIRED BY THE DIRECTIVE
IN A HANDHELD FORMAT.
Bruel & Kjaer introduces a portable system for acquisition,
measurement and evaluation of human vibration.
The Type 4447 Human Vibration Analyser is designed for monitoring
exposure of human operators to the harmful influences of vibration
of hand-tools, machinery, heavy vehicles, etcetera.
It is a compact, battery-driven, standalone instrument ideal for field
work and with a versatile graphics display for control of the instrument
and analysis of results. Four buttons control all functions, and all
necessary data is displayed for instant assessment of exposure to
vibration. A USB interface provides for archiving and post processing
of the data for calculation of vibration doses.
Among the parameters which the Type 4447 simultaneously measures
and calculates are triaxial running RMS vibration and peak vibration,
weighted or unweighted, crest factor for each axis, frequency-weighted
hand-arm vibration and whole-body vibration, the combined vibration
on all three axes as a vector sum, MTVV (maximum transient vibration
value), MSDV (motion sickness dose value), and VDV (vibration dose
value). The Type 4447 is delivered together with a software package
for calculation of vibration exposure to check the action values and limit
values as stated in European Directive 2002/44/EC.
Bruel & Kjaer sought input from many interested parties in the design
and development of the instrument. They include consultants working
with measurements of, and risk evaluations caused by, exposure to
occupational vibration; occupational health departments; manufacturers
of building machinery, freight vehicles and other machinery; manufacturers
of anti-vibration pads, seats and personal protection equipment;
manufacturers of all kinds of hand-tools; and educational and medical
About Brüel & Kjær
With more than 60 years experience, Brüel & Kjær is a world
leading manufacturer and supplier of sound and vibration
solutions for use in a wide range of applications including
environmental noise measurements, building acoustics,
vibration measurements and quality control for use in the
automotive, aerospace and consumer industries, as well
as by local authorities.
For more information, please contact :-
Bruel & Kjaer UK Ltd.
Bedford House, Rutherford, Close, Stevenage, Herts. SG1 2ND. UK
Tel: +44(0) 1438 739000
Fax: +44(0) 1438 739099