IKA A 10 basic 0004020700 Руководство по эксплуатации онлайн [18/100] 446175

If more refrigeration is required, the ground matter should

be cooled prior to being put into the grinding chamber.

Grinding dust may also leak out from this drain hole dur-

ing grinding process.

drain hole

Fig. 5

Note: only water (max. 40 °C) could be used for coolant

and water pressure should less than 1 bar for the instru-

ment. After the grinding, please ensure the cooling water

is completely empty from the cooling chamber.

Cooling with tap water is usually sucient for substances

which become hot as a result of the grinding operation

and thus are given to smearing or those that produce oil.

The grinding chamber may only be ﬁlled halfway espe-

cially when samples containing oils and similar materials

are ground.

Note: Moisture in material that is ground may evaporate

because of the material temperature increasing. Then, the

evaporated moisture will condense and ﬂow out from the

drain hole at the bottom of the instrument.

This could prevent the motor from damage of moisture.

Working with coolants – Dry ice cooling (CO

Please follow the safety instructions.

Crushing causes the mill feed to heat up. This may not al-

ways be desirable as the mill feed can change when heat-

ed (e.g. increased oxidation, loss of moisture, evaporation

of volatile components, etc.).

It may only be possible to crush mill feed which is viscous

or has a high fat content by embrittling using coolants.

The A10 basic offers following cooling processes:

First put the feed product into the grinding pot and then

add crushed dry ice.

Thoroughly mix the dry ice with the mill feed.

Only attach the chamber cap when the dry ice is com-

pletely vaporized, otherwise high pressure may build up in

the grinding chamber.

Please note that the mill feed heats up again extremely

quickly during grinding (it may reach room temperature

again after approximate 10 seconds of grinding). You may

have to repeat the process several times if the product is

not adequately ground after one cooling process.