Clarke CP254 Manual de Instruções de Operação e Manutenção - Página 10
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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 Number
Description
Declared vibration emission value in accordance with EN12096
Measured vibration emission value - a:
Value determined according to
You will note that a third value is given in the specification - the highest
measured reading in a single plane. This is the maximum level of vibration
measured during testing in one of the axes, and this should also be taken into
account when making a risk assessment.
'a' values in excess of 2.5 m/s
prolonged periods. A tool with a vibration value of 2.8 m/s
up to 8 hours (cumulative) per day, whereas a tool with a value of 11.2 m/s
may be used for ½ hour per day only.
The graph on the right shows the
vibration value against the maximum
time the respective tool may be
used, per day.
The uncertainty factor should also be
taken into account when assessing a
risk. The two figures 'a' and 'K' may
be added together and the resultant
value used to assess the risk.
It should be noted that if a tool is
used under abnormal, or unusual
conditions, then the vibration level
could possibly increase significantly. Users must always take this into account
and make their own risk assessment, using the graph above as a reference.
Some tools with a high vibration value, such as impact wrenches, are
generally used for a few seconds at a time, therefore the cumulative time
may only be in the order of a few minutes per day. Nevertheless, the
cumulative effect, particularly when added to that of other hand held power
tools that may be used, must always be taken into account when the total
daily dose rate is determined.
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CP254
Polisher
2
are considered hazardous when used for
10
2
7.59 m/s
EN28622-1
2
may be used for
2