Retsch GM 300 - Manual (Page 25)

Operating the machine
25
Fig. 13: Use of one or two sealing rings
NOTE
Thin fluid samples should be started at a low speed. Increase the speed gradually.
The maximum speed for liquid samples may not exceed 2,500 revolutions per
minute.
5.9 Starting the grinding process

Set the grinding parameters you wish to have.

Insert the grinding jar with the material to be ground, the knife and the lid.

Close the flap until the electromechanical safety interlock is closed.

Press the START (H) key.
5.10 Interrupting and continuing the grinding process
• Press the STOP (I) key.
The grinding process is interrupted or stopped.
5.11 Stopping the grinding process
Interrupting the Grinding Process (Pause)
• Press the STOP key (I) once.
The grinding process is interrupted.
Stopping the Grinding Process (End)