Clarke contractor CON100 Інструкція з експлуатації та обслуговування - Сторінка 13
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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 hertz is potentially damaging and is most
hazardous in the range from about 5 to 20 hertz.
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.
Declared vibration emission value in accordance with EN12096
Measured vibration emission value - a:
Uncertainty value - K:
Highest measured reading in a single plane
Values determined according to EN28622-1
HAND-ARM VIBRATION
13
2
13.90 m/s
2
1.5 m/s
26 m/s
2