FRITSCH PULVERISETTE 2 - Manual (Page 26)

The zero position of the pressure scale can be determined two different
ways:
n Close the lid and its latch. Start the device (START). The adjusting nut
(c) is now used to slowly lower the pestle until it touches the bottom
of the rotating mortar. When observing the pestle, it is possible to
see that the pestle is moved by the contact with the mortar. The
scale is now loosened (see illustration) and shifted so that it displays
the zero position of the pestle.
The bottom edge of the black adjusting nut is on the "0" line.
n Dampen a small piece of paper and press it, so it is flat on the
bottom of the mortar. (Do not place the paper in the centre but so
that it is off-centre).
Close the lid and its latch. Start the device (START). While observing
the rotating paper, the adjusting nut (c) is used to slowly lower the
pestle until the paper is held back by the pestle. The pestle has now
reached the bottom of the rotating mortar. The scale is now loos-
ened and shifted so that it displays the zero position of the pestle.
n Do not release the scale ring! It is only necessary to adjust the zero
position if the grinding set is changed.
6.6 Scraper
The fastener (g) of the scraper should not be tightened too firmly so that
the scraper can be moved around the Philips screw (g).
The scraper (h) is adjusted with the lid and the latch closed.
Using the device
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