Retsch RM 200 - Manual (Page 27)

11/6/2012 27  Retsch GmbH 0002
Do not add the material in batches.
The mortar and pestle can become blocked, which
leads to switching off of the machine.
Do not push material through the opening under the
cover I with your fingers.
Fingers can be squeezed.
Security advice for handling liquid
nitrogen
Safety goggles and protective gloves should
always be worn when handling liquid nitrogen.
Liquid nitrogen has a temperature of –196 °C and, if
it comes into contact with the skin or eyes, may
cause injuries similar to burns or frostbite.
Safety goggles also give protection against eye
injuries cause by flying fragments of glass from glass
containers, which may burst owing to cold tensions.
The RM 200 can also be used for cryogenic grinding.
Please note that the cooling liquid must be filled in
via a funnel to avoid damages of the cover of the RM
200.
Place a standard funnel Tr into the feed opening I.
Pour liquid nitrogen into the funnel and take care
that the liquid does not get in contact with the cover.
Fig. 19.1
A funnel must be used to fill cooling liquid into the
RM 200. Otherwise the cover might be damaged.
Please observe the security advice of the liquid
nitrogen supplier.
Retsch excludes any liability claims which may result
from the use of liquid nitrogen or similar substances.
Tr
I
Fig.19.1