STK OPERATOR’S MANUAL 9/4/18 Page 14 of 14
NOISE AND VIBRATION DATA
DECLARED DUAL-NUMBER NOISE EMISSION VALUES
in accordance with ISO 4871
Normal Operation
Measured A-weighted sound power level, L
WA
(ref. 1pW) in decibels
98
Uncertainty, K
WA
, in decibels
2
Measured A-weighted sound pressure level, L
pA
(ref. 20µPa) at the operator's position in decibels
82
Uncertainty, K
pA
, in decibels
3
Values determined according to noise test code given in Directive 2000/14/EC Annex III B54
using the basic standard ISO 3744:1994, and are rounded to the nearest decibel according to
ISO 4871.
NOTE - The sum of a measured noise emission value and its associated uncertainty
represents an upper boundary of the range of values which is likely to occur in
measurements.
Guaranteed sound power level
100 dB
Hearing protection devices do not all provide the same level of protection. Those that completely
surround each ear are better than earplugs. It is important to select a device that is adequate and
appropriate for your specific work environment since the peak noise level varies. A local
environmental noise specialist may help you to determine the level of hearing protection required.
The Barreto STK, when operated in accordance with its instructions and tested in accordance with
EN 12096:1996 results in the following emission declared in accordance with EN 12096:1996.
Average measured vibration emission value
a
hv
2.2 m/s
2
Uncertainty
K
0.1 m/s
2
These values are suitable for comparison with the vibration emission levels of other
tools that have been obtained using the same test method.
Since the value stated above is an average of several tests, and is based on data
from all three axes, we consider it to be a reasonable approximation of the true
value, particularly considering the uncertainty in the results (K).
This machine is unlikely to cause hand-arm vibration syndrome, as the emission
level is equal to or less than 2.5 m/s²
Safety gloves help to isolate the hands from the vibration, keep them warm and dry, maintain
blood circulation, and make operators less susceptible to vibration induced injury.
