FRITSCH PULVERISETTE 19 - Manual (Page 36)

6.2.1 Using the plunger
The plunger has 2 different sides for feeding the sample material in the
funnel to the grinding chamber. On the one hand, the smooth, round
side is suitable for finer material. On the other hand, the cross-shaped,
thinner side is suitable for long, fibrous material, like straw.
6.3 Comminution procedure with the protected funnel
1. Switch the control switch (19) on the back of the device to AUTO.
2. Close the cutting mill (see Ä Chapter 6.1.6 ‘Closing the cutting
mill’ on page 34).
3. Push in the collecting vessel (8).
4. Pull the sample pusher (24) out fully.
5. Move the plunger (23) into the lower position.
6. Flip open the funnel lid (21), add some comminution material and
close the lid again.
The quantity of comminution material is based on the particle feed
size and the grindability of the comminution material. It is best to
start with small quantities and increase them depending on the
success of the comminution.
7. Switch on the deviceà press the green Start (34) button (see
Ä Chapter 5.2 ‘Switching on’ on page 26).
8. Move the sample pusher (24) down towards the plunger (23) until
the comminution material is in front of the plunger (23).
9. Pull the plunger (23) upwards and move the sample pusher (24)
fully downwards until the comminution material falls into the cut-
ting chamber.
ð a slight operating noise becomes audible.
Using the device
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