Retsch Emax - Manual (Page 35)

Operating the machine
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To avoid operating errors, the correct position of the grinding jar support is queried
using a magnet (MG) via extension (MV) and the corresponding sensor before
each start of the machine and during grinding.
5.6 Closing the grinding jar
Fig. 25: Closing the grinding jar
With this grinding device, a very large amount of energy enters the sample
material.
•
Therefore ensure careful closing of the grinding jar.
• When closing the grinding jar, ensure the seal (DM) is firmly in place.
• Tighten the clamping screws (SP) of the locking device so they are hand-
tight.
• Check the tension on the 4 clamping screws (SP) after closing the grinding
jar support (G) with the twist grip (C).
• Please note that the grinding jar can heat up to over 100°C depending on
the grinding jar size, the ball filling, the speed and the grinding duration.
5.6.1 Grinding jar and lid identification
All grinding jars must be identified by the labelling area which shows the grinding
jar material.
Grinding jars, also those with glued ceramic inserts, can be cleaned with alcohol,
petrol or normal household washing-up liquid.
NOTICE
–
Ceramic inserts can crack as a result of sudden temperature differences.
• Do not expose grinding jars with ceramic inserts to sudden temperature
differences.
5.6.2 Drying the grinding jars
The grinding jars may be dried in the drying cabinet at the following specified
temperature at any time after cleaning.
Grinding jar material Temperature
Stainless steel Up to 200°C
Tungsten carbide Up to 150°C
Zirconium oxide Up to 120°C
DM
SP