FRITSCH ANALYSETTE 3 PRO - Manual (Page 41)

1 Upper part
2 Lower part
3 Grinding ball 50 mm
4 Mortar
5 Bent tube ventilation
6 Funnel for liquid nitrogen
7 Amplitude display
The lower part (2) is placed on the vibratory plate and the mortar with
ball (3) and grinding stock is placed into the plastic surround. Then the
upper part (1) is placed on the lower part, so that the seal ring in the
upper part is resting on the mortar edge and the bent ventilation tube
(5) is facing backwards and the amplitude display (7) is facing forwards.
The device is then clamped like a normal sieve set.
Liquid nitrogen is then poured in carefully through the funnel (6); it evap-
orates immediately and escapes through the bent ventilation tube. The
boiling nitrogen can be observed through the transparent Makrolon
screen. Nitrogen is added until the amount of vapour escaping
decreases. The grinding elements can then be cooled down enough for
grinding to begin. The same must be observed as for normal grinding
with the PULVERISETTE 0 as described above. (See Ä Chapter 7.5.1.1
‘Fitting and clamping the mortar’ on page 39).
During grinding, refill the same amount of nitrogen that evaporates.
7.5.1.4 Final fineness of a grinding process with the PULVERISETTE 0
The achievable final fineness (PULVERISETTE 0) of the grinding stock is
approx. 10 µm. (Depending on the grindability of the sample and the
grinding duration)
7.5.1.5 Cleaning grinding elements
Clean the mortar bowl and grinding balls after every use; e.g. under run-
ning water using a brush and a commercially available cleaning agent.
Cleaning with an ultrasonic cleaner is permitted.
NOTICE!
Cool grinding elements made of agate, sintered corundum
and zirconium oxide slowly and carefully.
Do not heat agate elements in a microwave under any cir-
cumstances (heating is too fast).
They must never be exposed to thermal shocks as this
could cause irreparable damage to the parts ® They will
burst apart like in an explosion.
Accessories
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