Retsch MM 200 - Manual (Page 10)

5/21/2012 10 Retsch GmbH
Protective equipment
The milling chamber of the laboratory mill MM 200 is
enclosed by a strong covering hood.
Starting the machine is possible only with the hood
closed.
Emissions
Noise characteristic values :
The noise characteristic values are also influenced by
the properties of the material to be milled.
Example 1:
Intensity of sound L
WA
= 71.4 dB(A)
Emission value related to
workplace L
pAeq
= 61 dB(A)
Operating conditions:
Container: 2 steel milling cups of 25 ml
Milling organ: 1 steel ball 20 mm
Material charged: Quartz crushed pebbles approx.
4.0 – 6.0mm
Charged quantity: 8ml
Example 2:
Intensity of sound L
WA
= 76 dB(A)
Emission value related to
workplace L
pAeq
= 65 dB(A)
Operating conditions:
Container: 2 steel milling cups of 5 ml
Milling organ: 2 tungsten carbide balls 8 mm
Material charged: Quartz crushed pebbles approx.
1.0 – 1.5mm
Charged quantity: 1.5ml