ATT Zirocco-M50, Operating Manual

Page: 6 / 37

6
Nameplate
The Zirocco-M50 is provided with a name plate according to the requirements stated in the Directive
2006/42/EC placed in the front of the product above the nozzle cover.
The nameplate is showing the CE and EAC (Russia) symbol as well as the website of the manufacturing
company (for contact information etc).
The nameplate is also showing some important
product information such as:
•
TYPE: Model number of the product
•
S/N: Serial number, a unique product number
•
Year: Year of manufacturing
•
LWA: Sound level in dB at less than 1m
distance from the noise source.
The Zirocco-M50 has an A-weighed max sound power level of 96 dBA around the machine and
90 dBA at
the operators’ position , at its max performance. The LWA is here not directly related to an environmental
noise level as weighted average of the different work steps during machine operation. It is the maximum
sound pressure which the operator will experience when using the machine at 100% performance level.
This choice of LWA was made to ensure proper health protection even when the machine is used above its
intended use.
When persons are exposed to excessively loud
environments (85 dB or more), hearing protection
is required to prevent noise-induced hearing losses.
The table to the left is showing the acceptable
noise levels without hearing protection during a
maximum daily exposure.
It is required that the operator of the Zirocco-M50 is using relevant hearing protection to prevent work
induced hearing losses.
In the United States hearing protection is by law assigned a single number rating, NRR, which is an
abbreviation for a Noise Reduction Rating. Hearing protection is available with NRR ratings from 0 to 30.
The required NRR level of a hearing protection is an estimate of the exposed daily noise level dose, which
then can be converted to an 8-hour Time Weighed Average called TWA.The following table shows the
required NRR rating for the hearing protection dependent of the average machine usage a day.