FRITSCH PULVERISETTE 4 classic line - Manual (Page 29)

NOTICE!
If the minimum filling quantity is fallen short of, increased
wear due to abrasion is to be expected. This can cause
irreparable damage to the mill components.
Grinding bowl Grinding bowl max. sample volumes
500 ml 80 ml 225 ml
250 ml 30 ml 125 ml
80 ml 1 ml 30 ml
6.3 Filling the grinding bowl
Do not fail to comply with the following sequence:
1.
Place the grinding balls in the empty bowl.
2. Fill grinding stock onto the balls.
3. Place the sealing ring on the rim of the grinding bowl.
NOTICE!
Make sure the sealing surfaces are clean!
4. Place the lid on the grinding bowl.
6.4 Factors with an impact on grinding
6.4.1 Running time (grinding duration)
A longer grinding time will increase the percentage of fine material. To
reduce the grinding time, you can use a grinding bowl and grinding balls
with a higher density, and thus a higher impact energy.
6.4.2 Speed
Higher speeds shorten the grinding time and increase the share of fine
particles.
Using the device
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