Accessories - IKA A 11 basic Mode D'emploi

Accessories

A 11.1 Beater 1.4034)
A 11.2 Cutting blade (1.4112)
A 11.3 Beater (1.4112)
A 11.4 Grindimg container 250 ml
Note on grinding beaker A 11.5:
Grinding cup made of Tefzel (ETFE). This fluorine plastic (similar to
PTFE) possesses excellent resistance to chemicals and is tem-
perature-resistant from -200°C to +150°C (ideal for direct cooling
with liquid nitrogen).
Color and structure flaws on the outside of the beaker are due to
manufacturing and do not affect the quality of the beaker.
The following instructions must be observed when using the
large grinding container A 11.4 (effective volume 250 ml):
Use double beater A 11.6 for crushing in grinding beaker A 11.4.
The double beater is screwed onto the drive shaft. Hold the drive
shaft in place using a single head wrench a/f 7. Using another sin-
gle head wrench a/f 7, which is attached to the two flats of the
double beater shaft, screw the double beater until it is hand - tight.
Please ensure that the off - drive shaft in the thread area is free
from dust and mill feed deposits.
Filling height:
The maximum filling height, shown in figure 5, must not be excee-
ded (about 20 mm below the stainles steel upper edge).
Otherwise the drive may overheat.
Furthermore, good grinding results connot be expected (a wide
range of granularity). What has been said before also applies here:
(for example, only 50 - 80% of the normaly filling quantity) are
reduced more quickly, the granularity of the final product is finer,
the range of granularity is smaller and the heating up of the grin-
ding material is reduced.
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A 11.5 Grindimg container 80 ml
A 11.6 Double beater
A 11.7 Filling funnel
Grinding process:
As the double beater is already immersed in the mill feed when
the grinding beaker is being screwed on, it is important that the
sample is well shredded (maximum particle size ø 7 mm) so that
the grinding beaker can be screwed on properly.
The hardness of the feed product must not exceed 3 Mohs (medi-
um hardness, e.g. calcite), otherwise this will put too much strain
on the beater, causing it to wear out quickly.
When you switch on the appliance at the On/Off button, the drive
will be pushed down slowly (see section on starting up). Once the
grinding process is complete (usually after approx. 30 seconds),
raise the drive and switch off the appliance at the On/Off button.
Caution: Wait until the motor stops before unscrewing the grin-
ding beaker.
Caution: Do not use liquid nitrogen to cool the sample in grinding
beaker A 11.4. You can use dry ice for cooling purposes, however,
please ensure that the cooled mill feed does not clump together
(this is likely to happen with moist mill feed in particular).
Caution: If you do not adhere to the maximum fill level and maxi-
mum mill feed hardness, the high starting torque of the grinding
beaker may cause the grinding beaker to open by up to half a revo-
lution and the analytical mill will switch off automatically.
102008