Fritsch PULVERISETTE 6 Classic, Operating Instructions Manual, Page: 43 / 70

6.10 Reverse mode
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Press the REVERSE button. The button lights up.
After the selected running time expires, the mill will change its direction
of rotation. For this, REPETITIONS has to indicate at least 1.
"Reverse" is selected when mixing dry samples, for example.
6.11 Conducting a grinding operation
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After all the preparations described in Ä Chapter 6.1 ‘Choice of
grinding bowls and grinding balls’ on page 27 to
Ä
Chapter 6.10
‘Reverse mode’ on page 43 have been carried out, close the hood (3).
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Press the START button on the control panel.
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The hood is locked and the mill starts up.
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The mill turns at the set speed (nominal speed). If the load is too
great, for example due to heavy grinding bowls, the speed is reduced
(actual speed) so that the machine is not overloaded.
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The "REDUCED SPEED" lamp is lit!
If the mill does not start, see Ä Chapter 10 ‘Repairs’
on page 58
While in operation, the hood (3) remains locked, even
during pause times, and the fan cools the interior.
6.11.1 Overload
The device requires a start-up phase at the beginning in
order to reach maximum performance. A well‐filled and
heavy grinding set may initially operate at a lower
speed than after running for approximately 1 - 2 hours.
Since a static mass (grinding bowl, grinding bowl holder
and planetary disk) and the dynamic mass (grinding
balls and sample material) counteract each other, heavy
grinding bowls and balls and maximum sample quanti‐
ties can result in a load that causes a reduced rotational
speed!
Using the device
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