Retsch GM 200 - Page 30

Operating the Device
30
Standard lid
Reduction lid
Gravity lid
Gravity lid
with overflow channels
Fig. 8: Lids for the GM 200
NOTICE The feed volume depends on the properties of the sample material or the lid used. Do
not exceed the recommended feed volume listed in the following table!
Type of lid
Application and feed volume
Standard lid
 for larger quantities of small-sized materials
 feed volume: 300 ml to max. 700 ml
 suitable for all grinding containers
Reduction lid
 for smaller quantities of small-sized materials
 feed volume: max. 300 ml (grinding chamber reduction to 0.5 l)
max. 200 ml (grinding chamber reduction to 0.3 l)
 only for the plastic container
Gravity lid
 for smaller quantities of dry materials
 feed volume: max. 300 ml
 available in two versions: for the plastic container
for the glass or stainless steel container
Gravity lid with
overflow channels
 for smaller quantities of aqueous materials
 feed volume: max. 300 ml
 available in two versions: for the plastic container
for the glass or stainless steel container
The reduction lid is held down by the hood (F) during the grinding process.
The gravity lid allows for an exact adjustment of the usable volume to the respective feed
volume. It moves downwards during the grinding and optimises the grinding chamber volume.
NOTICE
N15.0053
Cryogenic grinding
Grinding with liquid nitrogen (LN
2
)
 When grinding with liquid nitrogen, breakage of the grinding set and
damage to the device can occur!
 Grinding with liquid nitrogen is not permitted!