IKA MultiDrive MI 250 User manual

IKA MultiDrive MI 250
IKA MultiDrive MI 400
IKA MultiDrive MI 250 T
IKA MultiDrive MI 400 T

3
ENGLISH

4 5
Installation������������������������������������������������������������������������������������������������ 12
Explication of warning symbols ������������������������������������������������������������������� 6
!
Safety instructions��������������������������������������������������������������������������������������� 7
Unpacking �������������������������������������������������������������������������������������������������� 8
Technical Data ������������������������������������������������������������������������������������������ 25
Warranty �������������������������������������������������������������������������������������������������� 24
Maintenance and cleaning ������������������������������������������������������������������������ 18
Accessories ����������������������������������������������������������������������������������������������� 24
Useful information �������������������������������������������������������������������������������������� 9
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Fig. 1

6 7
Safety instructions
/// General information
› Read the operating instructions completely before starting up and follow the safety
instructions.
› Keep the operating instructions in a place where it can be accessed by everyone�
› Ensure that only trained staff work with the device�
› Follow the safety instructions, guidelines, occupational health and safety and accident
prevention regulations�
› The vessel must only be used in a technically perfect condition�
› Refer to the operating instructions for the drive unit�
Danger!
› Please observe the relevant safety instructions and guidelines regarding dust explosions�
Caution!
›Wear your personal protective equipment in accordance with the hazard category of the
medium to be processed, there is a risk of:
- body parts, hair, clothing and jewellery getting caught
- sharp blade edges�
!Notice!
› Pay attention to the marked sites in Fig� 1�
› Protect the vessel from bumping and impacting�
› Do not use any damaged vessel e�g� with hairline cracks or splits�
› Check the vessel beforehand for damage each time when you use them� Do not use dam-
aged components�
/// Device setup
!Notice!
› Ensure that the vessel and the cover is firmly attached to the drive unit prior to operating the
device�
› The drive unit cannot be operated without a closed vessel�
Source language: German
Explication of warning symbols
/// Warning symbols
Indicates an (extremely) hazardous situation, which, if not avoided, will
result in death, serious injury�
Danger!
Indicates a hazardous situation, which, if not avoided, can result in
death, serious injury�
Warning!
Indicates a potentially hazardous situation, which, if not avoided, can
result in injury�
Caution!
!
Indicates practices which, if not avoided, can result in equipment damage�
Notice!
/// General Symbols
Position number
A–––
Correct / Result
Shows the correct execution or the result of an action step�
Wrong
Shows the incorrect execution of an action step�
Note
Displays action steps that require particular attention to detail�
/// Working with the vessel
Danger!
› With substances capable of forming an explosive mixture, appropriate safety measures must
be applied, e�g� working under a fume hood�
› To avoid body injury and property damage, observe the relevant safety and accident preven-
tion measures when processing hazardous materials�
Warning!
› Only process samples that will not react dangerously to the extra energy produced through
processing� This also applies to any extra energy produced in other ways, e�g� through light
irradiation�
!

8 9
Useful information
The grinding vessel is designed for use in combination with MultiDrive basic / control, for
dry milling�
Note: MultiDrive MI 250 T / MI 400 T has integrated temperature / RFID sensor� When used
in combination with the MultiDrive control, it can be used to measure and limit the sample
temperature as well as to record the operating time and set the maintenance time�
Caution!
› Please pay attention to avoiding hand injury when operate and clean the vessel�
› The vessel and inside medium may be very hot after operation� Allow it to cool down before
opening the vessel� Use your personal protective equipment�
!Notice!
› The vessel must always be closed during operation� Switch off the drive unit immediately if
any material leaks from the vessel� Clean the device after disconnected power plug�
› No liquid medium can be processed in the vessel� The sealing is only suitable for dry medium�
› Hose connection suitable for cooling liquid up to max� 1 bar�
›When using dry ice, note the freezing point of the coolant in the cooling circuit and the
increase in pressure in closed vessels�
› The processing time is limited (depending on the vessel, see “Technical data”)� The vessel must
be allowed to cool down for a few minutes before processing the sample further in the vessel�
Unpacking
› Please unpack the vessel carefully�
› Any damage should be notified immediately to the shipping agent (post oce, railway network
or logistics company)�
1 IKA MultiDrive MI 250 or
IKA MultiDrive MI 400 or
IKA MultiDrive MI 250 T or
IKA MultiDrive MI 400 T
2User guide
3Warranty card
4Hose connection for cooling circuit (2 x)
IKA MultiDrive MI 250
IKA MultiDrive MI 400
IKA MultiDrive MI 250 T
IKA MultiDrive MI 400 T
Garanty
1+2+3
2
1
3
4
i
Temperature /
RFID reader
Temperature /
RFID sensor
Vessel Name: IKA MultiDrive MI 250 T
Maintenance Time: 20:00 hh:mm
Reset Maintenance Time: No
Temperature Limit: 120 ˚C
OK
Vessel
Vessel Name: IKA MultiDrive MI 400 T
Maintenance Time: 20:00 hh:mm
Reset Maintenance Time: No
Temperature Limit: 120 ˚C
OK
Vessel

10 11
The temperature measurement with the vessel MultiDrive MI 250 T / MI 400 T works
exclusively with the MultiDrive control� When the “Temperature Limit“ is set in MultiDrive
control that the device stops after the temperature is reached� With the setting, both sample
and the vessel can be protected from overheating�
Note: The temperature measurement is useful to measure / limit the temperature increase of
the medium during the operation� It is not for a long time measurement of the room tempera-
ture or medium temperature without operation!
The temperature sensor react slowly without operation� When hot or cold medium is filled into
the empty vessel, it need some time for MultiDrive control to show the right temperature�
During operation the sensor react very fast and the MultiDrive control can show the right
temperature fast�
The temperature measurement can be inhomogeneous, especially if the cooling function is
working and the operation stops or the medium flow inside the vessel and stops partly because
of sticky medium�
Caution!
The temperature can be much higher on the beater or other parts of the vessel independent
from the temperature which is shown on the MultiDrive control display�
!Notice!
In order to avoid to damage the integrate temperature sensor of the vessel by overheating, the
MultiDrive MI 250 T / MI 400 T milling vessel can be used for grinding material with hardness
up to 5 Mohs�
The vessels MultiDrive MI 250 T / MI 400 T has also an operating hours counter�
This works exclusively with the MultiDrive control� This drive unit can detect the operating hours
of the vessel and indicate when the next maintenance is required for the vessel� The operating
hours counter can also be used to monitor cleaning intervals� In this case shorter times can be set�
Note: For more information on temperature measurement and maintenance intervals, please
refer to the operating instructions of the drive unit�
Cutting milling:
The milling vessel with the cutting blade MultiDrive MI 250.2 / MI 400.2 (not included with
the vessel) can grind bulky, elastic fibrous and soft materials with high cellulose content�
Mixed goods such as trash must be free of iron and non-iron metals� The feed material must not
be too moist or fatty� Otherwise, the material may adhere to the sides of the grinding container�
Following is a list of some materials that can be reduced:
Leaves, fibers, hops, cardboard, paper, hay, plastics, tobacco and roots�
The feed granularity should not be larger than 10 mm�
Note: Materials that are not listed in these operating instructions may only be handled with the
grinding vessel after confirmed with IKA, especially if there is a risk of explosion (dust explosion
due to electrostatic charge)�
Impact milling:
The milling vessel with a beater (standard beater: MultiDrive MI 250.1 / MI 400.1) can grind
soft, medium hard and brittle materials with a Mohs’ scale of hardness of up to 5�
For harder material, the wear and tear on the grinding tool is high and grinding therefore becomes
uneconomical�
For grinding hardness greater than 5 Mohs, we recommend special hard metal beater
(MultiDrive MI 250.3 / MI 400.3, not included with the vessel)� With it, the device can be
used for grinding hard and brittle materials with a Mohs’ scale of hardness of up to 9� This
prevents the sample from being contaminated by bits of the grinding tool broken off by
wear and tear�
Everything that breaks, is dry, and does not have a high fat content can be ground�
Following is a list of some materials that can be ground dry:
Wheat, barley, corn, malt, pectin, roasted coffee, nutshells, bones, ergot, peat, feed materials,
spices, resin, potash, seeds, salts, cinders, tablets�
The feed grain size should not be larger than 7 mm�
Tough grinding material must be cooled, for example by adding pulverized dry ice to the grinding
vessel�
Working with cooling water:
There are two connections for the cooling circuits on the vessel� We recommend hoses with
dimensions of Ø 6�0 (inside diameter) x 1�5 mm� Then, the device can be cooled with tap water
or an IKA recirculating chiller via these hoses�
Note: The pressure in the cooling circuit must not exceed 1 bar�
The grinding chamber can only be filled to half of the maximum filling quantity especially when
material containing oils and similar materials are ground�
If more refrigeration is required, the ground material should be cooled prior to being put into
the grinding chamber�
Note the freezing point of the coolant in the cooling circuit when using dry ice�
Working with coolants – Dry ice (CO
2
) cooling:
Please observe the safety instructions!
Grinding causes the mill feed to heat up� This may not always be desirable as the mill feed can
change when heated (e�g� increased oxidation, loss of moisture, evaporation of volatile compo-
nents, etc�)�
It may only be possible to crush mill feed which is viscous or has a high fat content by embrittling
using coolants�
Working with the coolants dry ice (CO
2
):
› Put the feed material into the grinding vessel�
› Add crushed dry ice�
› Thoroughly mix the dry ice with the feed material�
›Attach the grinding vessel cap when the dry ice is completely vaporized, otherwise high
pressure may build up in the grinding chamber�
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 pro-
cess several times if the product is not adequately ground after one cooling process�
Warning!
Dry ice is solid carbon dioxide that expands into a gas� You can lose of consciousness, if dry ice
vapors are inhaled directly over a longer period of time� Use dry ice only in a well ventilated place�
Dry ice is extremely cold (-109 F/ -78 °C)� Avoid contact with skin and eyes�
When using dry ice, observe the applicable accident prevention regulations�

12 13
Installation
/// Attaching the vessel to the drive unit
/// Filling the vessel
!Notice!
Pay attention to the maximum filling level!
2.
Click
Click
1.
4
3.
1.
2.
green
Note: After the cap has been securely closed, the color of the LED signal lamp changes from
red to green� The unit is only ready for operation when the LED is green�
/// Closing the vessel
/// Switching on the drive unit
1.
2.
Click
1.
2.
Click

14 15
/// Connecting the cooling circuit
Click 2 x
1.
2.
1
When cooling the vessel with tap water, proceed as following:
Note: during the filling process, turn the vessel upside down�
After water comes out of the outlet hose, the system is filled� Then, turn back and install the
vessel to the drive unit for operation�
2

16 17
Hose recommendation: Ø 6�0 (inside diameter) x 1�5 mm�
Max� permissible pressure in cooling circuit 1 bar�
!Notice!
Ensure both hoses are connected before filling water to the cooling circuit�
Slowly increase the water pressure to prevent the hoses from slipping�
IKA recommends to use a pressure regulating valve for safely limit the pressure to 1 bar�
After cooling, close the water valve firstly� Then, disconnect the hoses and the hose connec-
tions�
Danger!
When cooling water is connected, ensure
that cooling water must not spray into the
venting slot of the drive unit!
/// Empty the cooling circuit
!Notice!
Empty the cooling liquid completely, if you use the vessel without cooling� Otherwise, the
temperature will increase and therefore the increased pressure in the closed cooling system can
destroy the seals and the cooling liquid could flow out�
Please note both hoses connections should be connected in order to empty the cooling liquid!
The hose connections have built-in valves� The cooling liquid can be drained out only when both
hoses connections are connected�
When disconnecting the hoses and hose connections, proceed as below:
!Notice!
When removing the vessel after milling, we advise to disconnect the hoses and hose connec-
tions together�
3

18 19
Maintenance and cleaning
The vessel is maintenance-free� It is only subject to the natural wear and tear of components and
their statistical failure rate�
/// Cleaning
› Use only cleaning agents which have been approved by IKA to clean the vessel:
These are: water (containing surfactant) and isopropyl alcohol�
› Before using another than the recommended method for cleaning or decontamination, the
user must ascertain with that this method does not destroy the device�
› Wear protective gloves during cleaning the vessel�
!Notice!
Don’t damage the sealing on the vessel cap when cleaning!
Sealing
You can also clean the dirty parts with a vacuum cleaner�
Clean dirty parts with a cleaning brush included with the drive unit�
1. 2.
1
If there is heavy accumulation of dirt on the vessel, it can be cleaned with wet cloth after disassembly�
Disassembly tools are included in the delivery scope of the drive unit�
Disassembly of the vessel for intensive cleaning of the individual parts:

20 21
2Caution!
The edges of the grinding tool are sharp� Wear protective gloves for handling and please observe
the safety instructions�
To loosen the retaining nut of the grinding tool, turn the socket wrench in clockwise direction
(left-hand thread)!
1.
2.
3.
3 4
1.
2.
3.
5
For thoroughly cleaning, the bearing carrier can be disassembled and cleaned the inside with
the cleaning brush or vacuum cleaner�
1.
2.
6 7

22 23
8 (a) 9
/// Repairs
Please send in device for repair only after it has been cleaned and is free from any
materials which may constitute a health hazard.
For repair, please request the “Decontamination Certificate” from IKA, or download print-
out of it from the IKA website www.ika.com�
If you require servicing, return the device in its original packaging� Storage packaging is not
sucient� Please also use suitable transport packaging�
/// Ordering spare parts
When ordering spare parts, please indicate:
› Vessel type�
› Item and designation of the spare part, see: www.ika.com, spare parts diagram and spare
parts list�
/// Exchanging and replacing the grinding tool
The grinding tool can be disassembled (see section “Cleaning“)�
When changing the grinding tool directly after a grinding procedure, the grinding tool is hot!
Let it cool down before handling it!
Before assembling a new or another grinding tool, make certain that all parts are clean!
8 (b)

24 25
Accessories
MultiDrive MI 250 / MI 400:
› MultiDrive MI 250.1 Standard beater
› MultiDrive MI 400.1 Standard beater
› MultiDrive MI 250.2 Star-shaped cutter
› MultiDrive MI 400.2 Star-shaped cutter
› MultiDrive MI 250.3 Hard metal beater
› MultiDrive MI 400.3 Hard metal beater
MultiDrive MI 250 T / MI 400 T:
› MultiDrive MI 250.1 Standard beater
› MultiDrive MI 400.1 Standard beater
› MultiDrive MI 250.2 Star-shaped cutter
› MultiDrive MI 400.2 Star-shaped cutter
See more accessories on www.ika.com�
Warranty
In accordance with IKA warranty conditions, the warranty period is 24 months� For claims under
the warranty please contact your local dealer� You may also send the machine direct to our factory,
enclosing the delivery invoice and giving reasons for the claim� You will be liable for freight costs�
The warranty does not cover worn out parts, nor does it apply to faults resulting from improper use,
insufficient care or maintenance not carried out in accordance with the instructions in this operating
manual�
Technical data
MultiDrive
MI 250
MultiDrive
MI 400
MultiDrive
MI 250 T
MultiDrive
MI 400 T
Max� useful volume ml 250 400 250 400
Grinding tools material Stainless steel
Grinding chamber material Stainless steel
Standard milling tool diameter mm 71 81 71 81
Max� circumferential speed m/s 75 85 75 85
Allowed speed range rpm 3000 ��� 20000 
Max� feed grain size
mm 7 (impact milling)
10 (cutting milling)
Max� feed hardness Mohs 5 (with standard beater)
9 (with hard metal beater)
5 (with standard beater)
Max� operating time
Min� cooling time
min�
5 
10
30 
10
Integrated temperature / RFID
sensor
No Yes
Min� / Max� temperature limit °C -
-50 ��� +120 
Temperature measurement No Yes
Temperature measurement
resolution
K - 0�1
Temperature measurement
accuracy
K - ± 5
Milling chamber can be
cooled with water
Yes
Cooling circuit temperature °C max� + 40
min� -5
Pressure in cooling circuit bar max� 1
Mill feed can be cooled in
milling chamber with dry ice
Yes
Mill feed can be cooled in
milling chamber with liquid
nitrogen
No
Maintenance time counter No Yes
Max� maintenance time h
-
40 
Recommended for drive unit
MultiDrive basic
MultiDrive control
MultiDrive control
FDA conformity Yes
Suitable for solvents NO
Suitable for abrasive substances Yes
Dishwasher cleanable No
Permissible ambient temperature °C + 5 ��� + 40
Permissible relative humidity % 80
Dimension (W x D x H) mm 160 x 160 x180
Weight kg 1�5
 Note: The value is limited by the drive unit!
Subject to technical changes!

20000024903b_EN_IKA MultiDrive MI 250_MI 400_MI 250 T / MI 400 T_072020_web
Technical specifications may be changed without prior notice�
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