Retsch DM 400 - Manual (Page 18)

Safety instructions and use
18
4. The interlock switch (13) pulls in the sample material container
after the start of grinding and locks it using the locking bolt (9) on
the container. During operation the interlock switch monitors
whether the device is closed correctly. It likewise prevents the
disc mill starting up after it has been opened.
The disc mill does not start if the grinding chamber
is open or the sample material container is missing.
2.7 Danger areas
CAUTION!
- Risk of crushing on hopper cover
- Risk of crushing when closing the grinding chamber
- Risk of crushing when cover of dust extraction is
removed during operation!
2.8 Electrical safety
2.8.1 General information
The disc mill is switched on and off with a main switch (3).
 By pressing the switch to I (On):
Disc mill is activated and can be started using the start button (e)
as long as the grinding chamber is closed and the sample material
container is inserted!
 By pressing the switch to O (off) during grinding:
The disc mill comes to a halt and is completely deactivated!
Grinding chamber and sample material container remain locked
when switched “off” and cannot be opened.
13