Retsch MM 500 Vario, Manual

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Operating the Device
38

The device hood is fitted with cushioning. This cushioning ensures that the device hood
does not open in an uncontrolled manner. The cushioning on the device takes effect as
from an opening angle of approx. 80°.
Close the device as follows:

Press the device hood (H) down by hand and close it completely.

The device hood is fitted with cushioning, which ensures that the device hood does not
close in an uncontrolled manner. The cushioning on the device hood takes effect as from
an opening angle of 80°.
6.3 Specifications regarding grinding balls and grinding jars
NOTICE
N13.0011
Wear or damage to the grinding balls and grinding jars
Use of different materials
−
Greater wear or damage is possible when operating the device with
grinding balls and grinding jars whose individual components are made of
different materials.
•
Only use grinding balls and grinding jars made of the same material.
NOTICE
N14.0000
Damage to the grinding jars
Incorrect filling of the grinding jars
−
If the grinding jar is filled with too little material, the grinding balls will
damage the grinding bowl.
•
The filling in the grinding jars must not be less than 25 % of the
grinding jar volume.
6.3.1 Grinding Jar Identification
All grinding jars and the corresponding grinding jar covers can be identified by labelling on the
outside. The labelling indicates the size and material of the grinding jar.
6.3.2 Ball Sizes and Speeds
A very large amount of energy is applied to the sample material on the MM 500 Vario. This
large amount of energy also affects the grinding jars and the grinding balls.
Depending on the grinding jar size , the following recommendations therefore apply to the
sample volume and ball sizes that can be used.