Clarke CROS1 Instructions d'utilisation et d'entretien - Page 10
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Vibration Emissions
Employers are advised to refer to the HSE publication "Guide for Employers".
All hand held power tools vibrate to some extent, and this vibration is transmitted to the
operator via the handle, or hand used to steady the tool. Vibration from about 2 to 1500
herz is potentially damaging and is most hazardous in the range from about 5 to 20 herz.
Operators who are regularly exposed to vibration may suffer from Hand Arm Vibration
Syndrome (HAVS), which includes 'dead hand', 'dead finger', and 'white finger'. These
are painful conditions and are widespread in industries where vibrating tools are used.
The health risk depends upon the vibration level and the length of time of exposure to
it......in effect, a daily vibration dose.
Tools are tested using specialised equipment, to approximate the vibration level generated
under normal, acceptable operating conditions for the tool in question. For example, a
grinder used at 45° on mild steel plate, or a sander on softwood in a horizontal plane etc.
These tests produce a value'a', expressed in metres per second per second, which
represents the average vibration level of all tests taken, in three axes where necessary,
and a second figure 'K', which represents the uncertainty factor, i.e. a value in excess of
'a', to which the tool could vibrate under normal conditions. These values appear in the
specification panel below.
MODEL No:
DESCRIPTION:
Declared vibration emmission value in accordance
Measured vibration emmission value - a:
Uncertainty value - K:
Highest measured reading in a single plane
Values determined according to EN28622-1
-10-
HAND-ARM VIBRATION
CROS1
ORBITAL SANDER
with EN12096
2
3.2m/s
1.28m/s
2
2
3.3m/s