Operating the machine, 4 switching on and off, 5 opening and closing of the grinding chamber – Retsch GM 300 User Manual
Page 20: 6 handling the knife, Caution
Operating the machine
20
5.4 Switching On and Off
•
Switch on the mill by pressing the ON/OFF switch (M) at the back.
When the GM300 is switched on for the first time, the language menu is displayed.
You can select your national language here by turning the operating knob (G).
Pressing this knob confirms the selection and the display shows
“Open Lid”.
5.5 Opening and closing of the grinding chamber
•
Press the (J) key.
The electromagnetic safety interlock opens and the flap can be folded back. The
grinding jar is now freely accessible.
NOTE
After the interruption or end of a grinding process, the flap must be opened once.
Closing the grinding chamber is only possible if the GM300 is connected to the
power supply and the main switch on the back of the device is switched on.
•
Shut the housing lid (B) and press it downwards until the lid closure is
activated .
A sensor detects the closure of the housing lid and the motor-driven lid closure is
switched on. The housing lid is closed automatically.
5.6 Handling the Knife
CAUTION
Injuries in the form of cuts
Sharp knife blades
–
The knife blades are very sharp and if handled incorrectly, they can lead to
injuries in the form of cuts.
•
Touch the knife only at the recessed grips.
•
Do not reach into the grinding jar as long as sample material is
covering the knife.
•
Only reach into the grinding jar if it is outside the mill.
•
Before taking out the knife, remove the sample material until the
recessed grips are free. Use a scraper or shake off the material.
NOTE
Insert the knife before feeding the material to be ground; otherwise, the
material to be cut up can settle between the knife and the driving shaft.