IKA A11 basic User manual

IKA®A11 basic
20000005398
A11 basic_052018

14
Contents EN
Declaration of conformity
We declare under our sole responsibility that this product corresponds to the
regulations 2014/35/EU, 2006/42/EC, 2014/30/EU and 2011/65/EU and conforms
with the standards or normative: EN 61010-1, EN 6010-2-051, EN 61326-1,
EN 60529 and EN ISO 12100.
Safety instructions
Page
Declaration of conformity 14
Safety instructions 14
Correct use 15
Unpacking 15
Useful facts 15
Commissioning 17
Malfunctions and eliminating malfunctions 18
Maintenance and cleaning 20
Accessories 21
Warranty 22
Technical data 22
List of spare parts A 11 basic 84
Spare parts diagram A 11 basic 86
In order to be able to use the appliance properly and safely, every user
must first read the operating instructions and observe the safety instruc-
tions contained therein. Take care of these operating instructions and
keep them in a place where they can be accessed by everyone.
Only staff who have been trained accordingly, know the appliance and are
authorised to carry out work in this field should use this appliance.
The machine may only be opened by trained specialists - even during repairs. The
machine is to be unplugged from the mains before opening. Live parts inside the
machine may still be live for some time after unplugging from the mains.
The appliance can only be disconnected from the mains supply by pulling out the
mains plug or the connector plug. The socket for the mains cord must be easily
accessible.
Please follow the relevant safety instructions and guidelines, and occupational
health and safety regulations for use in the laboratory. When working with the mill,
the user must wear his personal protective equipment. Defective or inappropriate
protective equipment can expose the user to the risk of spurting substances.
Please make certain that the mill is not tilted when it is in operation and hold it in
place with both hands.
Please ensure that there are no parts of the body between the casing parts that
move together.
Caution: Before removing the grinding beaker, switch off the mill and wait until the
motor stops. Risk posed by trailing crushing elements (beaters or cutters).
Always switch off the appliance and disconnect the plug before cleaning or replacing
parts.
Caution: The grinding beaker, crushing elements and rotor shaft may be hot after
long grinding cycles. Allow the mill to cool down before cleaning or before changing
crushing elements.
Caution: Beware of the sharp - edged cutter in particular when changing crushing
elements and when cleaning. Always wear your personal protective equipment
(protective gloves, etc.).
Please note that wear debris from the appliance or rotating accessories can end up
in the medium to be processed. Please contact IKA
®
should you have any questions
in this respect.
These operating instructions apply to all IKA
®
- S versions
(e.g. A 11 basic S 001).

15
The analytical mill A 11 basic may not been used in explosive atmospheres or
under water. Do not crush explosive, toxic or noxious substances. Please observe
the relevant safety instructions and guidelines regarding dust explosions.
Always wear suitable protective equipment when embrittling the mill feed with
coolants (liquid nitrogen or dry ice), (see laboratory guidelines and accident
prevention regulations applicable to the laboratory).
Ensure that pressure does not build up in the grinding chamber (particularly when
using coolants).
Caution: When using liquid nitrogen, you must only screw on the grinding beaker
and begin the grinding process when the liquid nitrogen is completely vaporized.
Caution: Appliance parts may still be extremely cold for some time after cooling
with liquid nitrogen and should only be handled whilst wearing protective
equipment.
The A 11 basic analysis mill is a batch mill that allows for two different grinding
procedures.
The grinding container closes airtight. This means that the loss of ground material
is equivalent to practically zero.
Impact milling:
For useage with hard, brittle grinding material, dried material or material that is
brittle because of cold (for example grain, coffee, etc.).
Here the grinding material is reduced by means of a beating rotor. The grinding
material is thus broken up. The granularity of the final product is determined by the
duration of the grinding, the level to which the container is filled and the physical
properties of the material being processed.
Cutting milling:
For usage with soft, fibrous grinding material (for example hay, paper, etc.).
Here the grinding material is cut by means of a rotating blade. In this case as well,
the granularity of the final product is determined by the duration of the grinding,
the level to which the container is filled and the physical properties of the material
being processed. Using the cutting method makes it possible to introduce less
energy into the grinding material, which results in less heating up. In this case as
well, because of the closed design, the loss of ground material is equivalent to
practically zero.
Please unpack the equipment carefully and check for any damages. It is important
that any damages which may have arisen during transport are ascertained when
unpacking. If applicable a fact report must be set immediately (post, rail or
forwarder).
The delivery includes:
The analysis mill A 11 basic with the grinding container A 11.5 (effective volume
80 ml), a beater A 11.1 made of stainless steel (1.4034), a set of tools and and an
operating instructions.
The analysis mill can be used for a wide range of applications. The list of grinding
materials given above is not complete. It is possible to expand the range of appli-
cations further by means of grinding experiments with corresponding grinding
procedures and sample preparations.
Impact milling:
The A 11 basic with a beater reduces soft, medium-hard and brittle materials with
a Mohs’ hardness of up to 6 (felsite: 6 Mohs; quartz: 7 Mohs). For greater levels
of hardness, the wear and tear on the pulverization tool is very high and grinding
therefore becomes uneconomical. If the A 11 basic is used for grinding materials
with hardness greater than 4 Mohs, the A 11.3 beater, which is more resistant to
wear and tear, must be used. 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 substances that can be ground dry:
Grain, barley, corn, malt, pectin, roasted coffee, bark, roots, nutshells, bones,
ergot, compressed materials, peat, cellulose, pharmaceutical, artificial, fertilizers,
feed materials, spices, resin, potash, seeds, salts, slag.
Tough grinding material must be cooled, for example by adding pulverized dry ice
to the grinding container.
Correct use
Unpacking
Useful facts

16
The grinding material must be initially broken down into pieces with a diameter of
1cm (feed granularity 10 mm, the size of a grain of corn is ideal).
Cutting milling:
The A 11 basic with the A 11.2 cutting blade reduces 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, spices, grain, hops, cardboard, paper, hay, plastics, tobacco, peat,
feed goods, dough and roots.
The feed granularity should be no greater than 10 mm.
For moist and sticky feed material (for example fish, meat), reduction is also
possible by adding water. This prevents the grinding material from adhering to the
walls of the grinding container, and the blades continue to engage the grinding
material.
Note: If water is added, the grinding container should not be filled to more than
50% capacity. The mill must only be used in an upright position in this case (must
not be agitated or turned on its head).
Please note: Materials that are not listed above should only be reduced in the
A 11 basic after confirmation from IKA
®
, especially if there is uncertainty about the
danger of explosion (dust explosion as a result of electrostatic charge).
Working with coolants
Please follow the safety instructions.
Crushing 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 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 A 11 basic offers two cooling processes:
Dry ice cooling (CO
2
): approx. –78 °C
First put the feed product into the grinding beaker and then add crushed dry ice.
Thoroughly mix the dry ice with the mill feed. Only attach the drive once the dry ice
is completely vaporized, otherwise high pressure can build up in the grinding chamber.
Please note that the mill feed heats up again extremely quickly during crushing (it
may reach room temperature again after approx. 10 seconds of grinding). You may
have to repeat the process several times if the product is not adequately crushed
after one cooling process.
Liquid nitrogen cooling (N
2
): approx. –196 °C
Please follow the safety instructions for liquid nitrogen cooling in particular and
always wear your personal protective equipment (safety goggles, protective gloves,
etc.).
Use a beater (A 11.1 or A 11.3) to crush mill feed embrittled with liquid nitrogen.
The cutter (A 11.2) is not recommended for this purpose (becomes blunt quickly).
Grinding beaker A 11.5 (included in delivery) is made of fluoroplastic (ETFE) with a
stainless steel insert.
First pour the feed product into the grinding beaker Pour liquid nitrogen into the
grinding beaker using a suitable Dewar vessel, ensuring that the sample is completely
covered or swimming in liquid nitrogen.Only attach the drive once the nitrogen is
completely vaporized, otherwise high pressure can build up in the grinding chamber.
Please note that the mill feed heats up again extremely quickly during crushing (it
may reach room temperature again after approx. 20 seconds of grinding).
If the feed product has a fine fraction or if the same sample is cooled several
times, use filling funnel A 11.7 (IKA
®
accessories). The funnel is attached to the
grinding beaker before filling and prevents fines from the mill feed from swilling
out of the grinding beaker when you are pouring in the liquid nitrogen and during
vaporization. The funnel’s close - meshed stainless steel wire cloth (mesh size 0.063
mm) retains the fine fraction of the sample and allows you to pour in the nitrogen
more easily.
Caution: The outer edge of the grinding beaker and filling funnel can also get very
cold and must only be handled using personal protective equipment.
Caution:
Fill liquid nitrogen only into the grinding beaker! Avoid strictly any contact
of liquid nitrogen with all other parts!
Please note that the grinding beaker can ”ice up”, especially in the case of
repeated cooling. As a result, it may be dicult or even impossible to screw it on. If
so, you will need to ”clean” the grinding beaker, i.e. let it thaw out or wash it in a
dishwasher. Always dry the grinding beaker before using it again.

17
Caution: Liquid nitrogen cooling is not permitted in grinding beaker A 11.4 (250
ml beaker made of polycarbonate).The beaker would break during cooling.
Check whether the voltage specified on the type plate matches the mains voltage
available. The power socket used must be earthed (protective earth conductor
contact). If these conditions are met, the device is ready to operate after plugging
in the mains plug. If these procedures are not followed, safe operation cannot be
guaranteed and / or the equipment may be damaged.
Observe the ambient conditions (temperature, humidity, etc.) listed under “Technical
Data”.
The grinding container in figure 1 can be unscrewed and removed by rotating it
counterclockwise. The drive section can be turned off on the guard ring (item 8).
The grinding container is filled with a suitable material. It is essential at this point not
to fill the container higher than the maximum filling height (up to the lower edge in
the grinding container, see figure 1). Filling the container to a higher level will result
in interfering with the operation, which will overload the mill. The filling
quantity can be reduced down to the „uniform grain size“ (in other words minimum
quantities are also possible).
Note: Smaller filling quantities (for example only about 50 - 80% of the maximum
filling quantity) can be pulverized more quickly, the final granularity is finer, the range
of granularity is smaller and there is less heating up of the grinding materials. It is
better to reduce a large quantity of grinding materials in two or three portions. The
actual grinding time is only barely longer, but the grinding results are considerably
better.
Bulky grinding material (for example hay, etc.) can also be filled up higher than the
lower edge, but no more than about 20 mm below the upper edge of the grinding
container. The loose grinding material is forced into the grinding zone when the
drive is pushed in.
The filling grinding container is screwed in onto the drive up to the stop (you can
hear a soft click just before reaching the stop).
When electrical power has been connected, you can begin with the grinding
procedure. Grasp the hood with one hand, press the on/off - switch with your
Commissioning
thumb (figure 2), and the mill starts. Pressing the drive down softly and slowly in
the axial pressing direction forces the pulverization tool into the grinding material
(pressing on one side only can tilt the drive, which could result in premature wear
and tear on the shaft seal).
When the pulverization tool engages the grinding material, the speed of the motor
decreases. The reduction in rpms is audible. If the reduction in speed is very pronounced,
the speed of the drive should be increased to be able to insert pulverization tool
into the grinding material at nominal speed. Depending on the grinding material,
it may be necessary to repeat this procedure several times. If the speed remains
relatively constant while the pulverization tool is being lowered and raised back up,
the grinding procedure is complete.
The grinding time should not exceed 30 seconds. Further grinding will not improve
the pulverization of the grinding material, but heating up will increase considerably.
The appliance is designed for short-time operation. Maximum on-time 1 min,
minimum off-time 10 mins. Increasing the on-time or reducing the off-time can
cause the motor to overheat prematurely, which will in turn cause the appliance to
switch off (see Faults and Troubleshooting). The appliance is fused to protect it in
the case of over-use.
Before the grinding procedure is complete, the drive should be raised completely.
Only then should the On/Off - switch be turned off. The advantage of this method is
that the pulverization tool cleans itself. Do not unscrew the grinding container until
the motor has come to a standstill. Any grinding material that adheres to the guard
ring can be swept off on the guard ring into the grinding container with a cleaning
brush (no wire brushes!).
Always remove any grinding scrap which gets into the interstice before using the
appliance again (see ”Maintenance and Cleaning” section).
Please note: The grinding tools, the grinding container and the rotor shaft may be
hot. Observe the safety instructions.
Exchanging the pulverization tools:
Please note: The edges of the blade are sharp. It should only be handled with
protective gloves. Please observe the safety instructions. Note that when changing
the tool directly after a grinding procedure, the pulverization tools are hot. The mill
must first be allowed to cool off.
Before exchanging the pulverization tools, unplug the power cord.
Rotate the mill drive onto its head and push it into the grinding container with the

18
head down (see figure 3).
Hold the rotor shaft securely in place with the curved single - head wrench by the
flattened section underneath the pulverization tool. Loosen and remove the
hexagonal nut (item 24) with the second single - head wrench and remove the
blade or the beater.
Before assembling a new or another pulverization tool, make certain that all parts
are clean. It does not matter which direction beaters and blades are installed in. Due
to their double - sided operation, the two pulverization tools have a service life that
is twice as long. If one side is dull or worn, you can use the other side by turning the
beater or blade around.
After you have set the pulverization tool in place, tighten the hexagonal nut to
finger tightness. To do this, use the tools as shown in figure 3.
Malfunction display
The malfunction display lights up if the grinding container has not been screwed in
to the stop and the On/Off - switch has been pressed.
The malfunction display also lights up if the motor circuit breaker has been triggered
and the On/Off - switch is pressed. The malfunction display alone does not indicate
which of the two possible errors has occurred. As a rule, if the motor circuit breaker
has been engaged, an elevated temperature has been detected on the mill housing.
Temperature and over-current protection
The A 11 basic mill is protected from overload and / or overheating by a
combined temperature and overcurrent switch.
The motor circuit breaker turns itself back off automatically when the temperature of
the mill is again in an acceptable range and the On/Off -switch has not been pressed.
This may be after only a few seconds in the case of a short-term overload. If the mill
has heated up a great deal after an extended period of operation, it may take up to
30 minutes to cool off.
You should not press the On/Off - switch repeatedly during the cooling off - phase,
because the motor circuit breaker is equipped with an auto - hold function that
prevents the mill from starting up again if the On/Off - switch is pressed repeatedly.
To determine whether the mill is ready to start up again, you should press the On/
Malfunction and eliminating malfunctions
Off - switch at intervals of from 5 to 10 minutes. If the malfunction display lights
up again while the grinding container is screwed on, the temperature is still too hot
(maximum cooling - off time 30 minutes at an ambient temperature of about 25 °C).
The 100-115V version of the A11 basic is additionally equipped with a circuit breaker.
This turns the mill in case of sudden overload (motor blocks) from. If the cause of
the fault has been eliminated (eg. too large feed size or too much material to be
ground in the grinding bowl), the circuit breaker can again be without a waiting
period with the supplied reset pin is turned on. For this purpose, the thin end of the
pin is inserted into the membrane grommet on the back of the A11 basic (above the
power cord) to the stop. (see figure 6)
Eliminating malfunctions:
The mill does not start up:
Causes:
- Power cord is not plugged into the socket correctly.
- You did not push the On/Off - switch down far enough.
- The grinding container is not screwed in up to the stop (when you press the
On/Off - switch the malfunction display lights up).
-
The mill has been heated up by the previous grinding procedure (the malfunction
display lights up when you press the On/Off - switch).
- After disassembling the middle section (for example to clean it) the switch block
is not completely engaged.
- Circuit breaker tripped (only 100-115V version).
Remedy:
- If necessary, check the power supply and the power cord.
- Push the On/Off - switch down until a „click“ is audible.
- Reset circuit breaker (only 100-115V version).
If the malfunction display lights up when you push the On/Off - switch:
- Screw the grinding container up to the stop (a soft „Click“ is audible) and if
necessary remove any dirt from the threading.
- Check to make sure the switch block is engaged in place.
- If the mill has overheated, wait a few minutes for it to cool down.
The motor is locked after the On/Off - switch has been pressed, or the mill
switches off shortly after it has started.

19
Causes:
- Too much grinding material in the grinding container (filling hight exceeded).
- The feed granularity is too coarse.
- Motor circuit breaker is tripped because of lock (overload).
Remedy:
- Release the On/Off - switch and remove the grinding container. If fragments of
the grinding material have become stuck between the grinding tool and the guard
ring, do not remove them until after you have disconnected the power cord.
- Fill the grinding container with a sucient amount of pre-reduced grinding
material.
- Do not exceed the maximum filling hight in any case.
- In the case of hard or tough grinding material, reduce the maximum filling hight
by 50%.
- If the motor circuit breaker has been tripped, you must wait until it switches
back off.
- Wherein the triggered circuit breaker (100-115V version) this will be as described
above with no waiting time is reset.
The motor speed falls sharply or the mill is locked during operation:
Causes:
- The feed granularity is too coarse, ≥ 10 mm.
- There is too much feed material in the grinding container.
- The grinding material is too tough.
- The pulverization tool is being lowerded down into the grinding material too
quickly.
Remedy (motor speed falls):
- The speed can be kept at a constant level if the grinding tool is moved slowly
into the grinding material. If the speed drops off, you should not lower the tool
any further. Instead you should raise it again and try to move the tool slowly into
the grinding material at the nominal motor speed.
Remedy (locking):
- Release the On/Off - switch and remove the grinding container. If fragments of
the grinding material have become stuck between the grinding tool and the guard
ring, do not remove them until after you have disconnected the power cord.
Caution: The shaft of the grinding container and the pulverization
tools may not be hot. If necessary, allow the mill to cool off.
- Fill the grinding container with a sucient amount of pre-reduced grinding
material.
- Do not exceed the maximum filling hight in any case.
- In the case of hard or tough grinding material, reduce the maximum filling
height by 50%.
- If you do not release the On/Off - switch and the motor is locked, the motor
circuit breaker or the circuit breaker (at 100-115V) will be tripped.
- Before continuing with operation allow the mill to cool off or reset the circuit
breaker.
The drive suddenly cuts out during the grinding procedure:
Causes:
- Overheating of the drive (malfunction display lights up when the On/Off - switch
is pressed, parts of the housing are warm).
- The grinding container has rotated itself loose and has triggered the circuit
breaker (malfunction display lights up when you push the On/Off - switch).
- The power supply has been interrupted.
Remedy:
- If the mill has overheated, wait a few minutes.
- Screw in the grinding container up to the stop.
- Check the power supply.
The lifting motion is blocked:
Causes:
- The middle section is dirty.
Remedy:
- Clean the middle section (see the section entitled „Maintenance and cleaning“).
If this occurs quite often, you should check the seal (item 20), (if necessary, replace
the seal as described in the section „Maintenance and cleaning“).

20
Cleaning:
Unplug the power cord before all cleaning tasks!
Dirty parts in the pulverization area can be cleaned with a cleaning brush. If there
is a heavy accumulation of dirt, the grinding container can be cleaned in a dish-
washer. If grinding dust is found in the middle section (the area where pressure
spring is located) it can be blown out through the opening with compressed air.
If there is a heavy accumulation of dirt on the guard ring and the middle section
can be disassembled as follows (see figure 4).
First, the pulverization tool must be disassembled. (See „Exchanging the pulveriza-
tion tools“). Then the mill should be placed on the guard ring (item 8) and the two
guide screws (item 22) should be opened with a hexagonal socket head wrench.
Caution: The mill must be held in place by the drive section during the opening
process, since the middle section and the drive section are under spring tension as a
result of the pressure spring. When both screws have been opened, the drive section
can be pulled away from the middle section. the switch block (item 15) remains on
the drive section.
The middle section and if necessary the pressure spring can be cleaned in a
dishwasher.
The drive section should simply be wiped clean with a moist cloth. Never clean in
water or in a dishwasher.
Assembly:
The pressure spring should be inserted into the middle section so that it is held into
the guide groove. The guide screws should be screwed in until just after they no
longer protrude into the internal diameter of the middle section.
Now the drive section should be set in place so that at first the spring is held in the
guide groove and the switch block snaps into the matching opening in the middle
section.
For the switch block to engage completely in place, the drive section must be pushed
into the middle section up to the lower stop. While the drive sections is inserted
about half way into the middle section, the guide screws should be tightened.
Caution: The switch block must engage flush in the middle section in the assembled
state. This should always be checked and if necessary corrected.
Maitenance and cleaning
Finally the desired pulverization tool is assembled.
Maintenance:
If beaters or blades wear out over the course of time, especially as a result of
constant grinding of very hard materials, so that rapid grinding with the appropriate
quality is no longer possible, you need to replace the worn - out parts. Blades can
be resharpened with standard commercially available sharpeners.
Caution: If blades are sharpened with a grinding machine (wet grinding only is
permissible). you should make certain that the same amount of material is removed
on all sides. Otherwise the blades will become unbalanced.
If more grinding dust settles into the middle section over the course of time, the
seal (item 20) must be replaced.
To do this, you must follow this procedure (see figure 4):
• Disassemble the middle section as described under „Cleaning and maintenance”
• Loosen the three nuts (item 13) with a socket wrench.
• Take out the guard ring (item 8) and remove the seal from the plastic section.
NOTE: Before installing the new seal, make certain, that the seal seat is clean and
free of dust.
To perform the assembly, place the middle section on its head.
• Insert the seal. Make certain as you do this that you install it in the correct
direction
• Now set the O-ring (item 19) in place. Always use a new O-ring
• Then place the O-ring (item 9) in place, set the guard ring in place and screw it
until it is tight.
When ordering spare parts, please give the manufacturing number shown
on the type plate, the machine type and the name of the spare part and
its item.
Please send in the equipment for repair only after it has been cleaned and is free
from any materials which may constitute a health hazard. Please tell us if you have
used any materials which are dangerous or which may constitute a health hazard.

21
Use only cleansing agents which have been approved by IKA®to clean IKA®devices.
To remove use:
Dyes isopropyl alcohol
Construction materials water containing tenside / isopropyl alcohol
Cosmetics water containing tenside / isopropyl alcohol
Foodstuffs water containing tenside
Fuels water containing tenside
For materials which are not listed, please request information from IKA
®
. Wear the
proper protective gloves during cleaning of the devices.
Electrical devices may not be placed in the cleansing agent for the purpose of
cleaning.
Before using another than the recommended method for cleaning or decontami-
nation, the user must ascertain with the manufacturer that this method does not
destroy the instrument.
Please return the appliance in its original packaging. Storage packaging is not
sucient for returns. Please also use suitable packaging for transportation.
A 11.1 Beater 1.4034) A 11.5 Grinding container 80 ml
A 11.2 Cutting blade (1.4112) A 11.6 Double beater
A 11.3 Beater (1.4112) A 11.7 Filling funnel
A 11.4 Grinding container 250 ml
Note on grinding beaker A 11.5:
Grinding cup made of Tefzel (ETFE). This fluorine plastic (similar to Teflon) possesses
excellent resistance to chemicals and is temperature-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
Accessories
using a single head wrench a/f 7. Using another single 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 exceeded (about 20 mm
below the stainless steel upper edge). Otherwise the drive may overheat.
Furthermore, good grinding results cannot be expected (a wide range of granula-
rity). What has been said before also applies here: (for example, only 50 - 80% of
the normally 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 grinding
material is reduced.
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 (medium 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 grinding 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 maximum mill feed
hardness, the high starting torque of the grinding beaker may cause the grinding
beaker to open by up to half a revolution and the analytical mill will switch off
automatically.

22
You have purchased an original IKA
®
laboratory machine which meets the highest
engineering and quality standards.
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 works, enclosing the delivery invoice and giving reasons for
the claim. You will be liable for freight costs.
The warranty does not cover wearing parts, nor does it apply to faults resulting from
improper use or insucient care and maintenance contrary to the instructions in this
operating manual.
Design voltage VAC 220-230±10%
or VAC100-115±10%
Design frequency Hz 50/60
Power consumption W160
Output power W100
Motor speed, idle rpm 28 000
Motor speed, under load rpm 25 000
Circumferal speed
Idle m/s 76
Under load m/s 53
Effective volume
Grinding container A 11.5 ml 80
Grinding container A 11.4 ml 250
Working time
Short-time operation (KB) min 1 / 10
1 min. ON / 10 min OFF
Safety Safety switch on the grinding container,
temperature limiter in the motor
Fuse on power board
220-230 V A8T Id.-No. 31 406 00
100-115 V A6.3 A circuit-breaker
Warranty
Technical data
Malfunction display Orange-red glow lights, display of over-
temperature and grinding area not closed
Drive
Universal motor
Parts in contact with product
Grinding beaker A 11.5 (80 ml) stainless steel 1.4571
(outer shell fluoroplastic ETFE)
Grinding beaker A 11.4 (250 ml) stainless steel 1.4571
(outer shell polycarbonate PC)
Rotor shaft stainless steel 1.4571
Beater A 11.1 stainless steel 1.4034
(hardness approx. 52 HRC)
Cutter A 11.2 stainless steel 1.4112
(hardness approx. 55 HRC)
Beater A 11.3
stainless steel 1.4112, wolfram - carbide coated
(core hardness approx. 58 HRC, surface
hardness approx. 1500 HV)
Double beater A 11.6 titanium (plasma nitrited,
surface hardness 1200 HV)
Filling funnel A 11.7 stainless steel1.4571/PTFE
Permitted ambient
temperature: °C +5 to +40
Permitted relative humidity %80
Protection type to IP 43
DIN EN 60529
Protection class II
Excess voltage category II
Contamination level 2
Noise level dB max. 85
Operation at a mmax. 2000
above sea level terrestrial altitude
Dimensions (W x D x H) mm 85 x 85 x 240
Weight kg 1.5
Subject to technical changes!