20000004638
IKA® RW 28 digital
Operating instructions EN
Reg.-No. 4343-01
min
min
A
min
C
B
P
M
n
Drehknopfstellung
Motorleistung und Leistung an der Abtriebswelle
PM; P
W
n
Motordrehzahl
M
n
Drehzahl Abtriebswelle
W
Moment Abtriebswelle
M
W
Moment Motor
M
M
Rotary knob position
Motor power and power at off-drive shaft
PM; P
W
n
Motor speed
M
n
Speed of output shaft
W
Moment of output shaft
M
W
M
Moment of motor
M
Position du bouton rotatif
PM; P
Puissance du moteur et puissance à l'arbre de sortie
W
n
Vitesse de rotation du moteur
M
n
Vitesse de rotation de l'arbre de sortie
W
M
Moment de l'arbre de sortie
W
Moment du moteur
M
M
P
= PW
M
max
max
max
D
E
n
M
n
W
M
W
M
M
Fig. 1
Fig. 3
Fig. 2
2
I
G
H
G
J
Fig. 4
Fig. 7
T
U
S
Q
Fig. 5
G
H
Z
G
I
Fig. 6
K
M
L
W
V
Fig. 8 Fig. 9
X
3
Source language: German
EN
Contents
Page
EC-Declaration of conformity 4
Explication of warning symbols 4
Safety instructions 5
Correct use 7
Unpacking 7
Useful information 7
Drive 7
Motor circuit breaker 8
Gear speed change 8
Output shaft 8
Speed display 8
Commissioning 9
Securing 9
Switching on the machine 10
Maintenance and cleaning 10
Error codes 11
Warranty 11
Accessories 11
Permitted IKA
Technical data 12
®
stirrer tools 11
EC-
Declaration of conformity
We declare under our sole responsibility that this product corresponds to the regulations 2006/42/EC and 2004/108/ EC
and conforms with the standards or standardized documents: EN 61010-1, -2-051; EN 12100-1, -2;
EN 61326-1.
EN 60204-1 and
Explication of warning symbols
General hazard
DANGER
WARNING
CAUTION
This symbol identifies information that is of vital importance for safeguarding your health
and safety. Disregarding this information can lead to health impairment and injuries.
This symbol identifies information that is of importance for the technically correct functioning
of the system. Disregarding this information can result in damage to the instrument or to system
components.
This symbol indicates information which is important for ensuring that the operations of the
instrument
information can result in inaccurate results.
are performed eciently and for using the instrument. Failure to observe this
4
Safety instructions
•
Read the operating instructions in full 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 instrument.
• Follow the safety instructions, guidelines, occupational health and safety and accident prevention regulations.
• Because the options for combining products,
tools, stirring vessel, experiment and medium
are nearly endless, user safety cannot be ensured simply with design requirements on the
part of the product. For this reason, it may become necessary for users to take other precautionary safety measures. For example, glass apparatus or other stirring vessels that are sensitive
to mechanical stress can be damaged or shattered by an imbalance, increasing the speed too
quickly or too little distance between the stirring
element and the stirring vessel. Users can suffer
serious injury from glass breakage or from the
freely rotating stirring element.
• Uncontrolled reactions can be triggered by mixing the heated material insuciently or by the
energy generated by selecting a speed that is
too high. In case of these and other increased
operational hazards, users must take additional
appropriate safety precautions (e.g. shatter
protection). In any case, when using critical or
hazardous materials in your processes,
recommends to use additional appropriate
measures to ensure safety in the experiment.
For example, users can implement measures
that inhibit fire or explosions or comprehensive monitoring equipment.
ers must make sure that the OFF switch of the
IKA® product can be accessed immediately, di-
rectly and without risk at any time, and above
all, in case of fault.
DANGER
• Only process media 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.
•
Do not operate the instrument in explosive atmospheres, with hazardous substances or under
water.
If installation or positioning
cannot ensure this access at
all times, an additional EMER-
GENCY STOP switch that can
be easily accessed must be installed in the work area.
Furthermore, us-
IKA®
•
Process pathogenic materials only in closed vessels
under a suitable fume hood. Please contact IKA®
application support if you have any question.
•
The instrument is not suitable for manual operation.
•
The high torque developed by the RW 28 digital
requires particular care in the choice of stand, cross
sleeve and anti-rotation element for the agitating
vessel.
• Set up the stand in a spacious area on an even,
stable, clean, non-slip, dry and fireproof surface.
• You must ensure that the stirring element is securely clamped in the chuck!
•
Use stirring shaft protective equipment!
• The agitated vessels used for stirring have to be
secured. Consider on a good stability of the entire structure.
DANGER
•
Protect the instrument and accessories from
bumping and impacting.
• Check the instrument and accessories beforehand for damage each time when you use
them. Do not use damaged components.
•
Safe operation is only guaranteed with the acces-
sories described in the ”Accessories” section.
• Always switch the main switch in the OFF posi-
tion or disconnect the power before changing
stirring element and fitting allowed accessories.
• The instrument 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.
•
Socket must be earthed (protective ground contact).
• The voltage stated on the type plate must correspond to the mains voltage.
• Please observe the permitted speed for the stirring element. Never set higher speed.
• Make certain that the unit is set at the lowest
speed before commissioning; otherwise, the
unit will begin running at the speed set in last
operation. Gradually increase the speed.
• Pay attention when setting the speed to any
imbalance of the stirrer tools and possible
spraying of the medium to be stirred.
DANGER
Please pay attention to
the dangerous parts of the
equipment in Fig. 9.
Never operate the instrument
with the stirrer tools rotating freely. Ensure that parts
of the body, hair, jewelry or
items of clothing cannot be
trapped by the rotating parts.
5
DANGER
DANGER
DANGER
DANGER
DANGER
The operation of a free rotating shaft end is dangerous. Therefore, for safety
reasons, only insert through
the stirring tool over the
upper edge of housing at
standstill.
Wear your personal protective equipment in accordance with the hazard category of the medium to be
processed. Otherwise there
is a risk of:
- splashing of liquids
- projectile parts
- body parts, hair, clothing
and jewelry getting caught.
Beware of the risk of
- flammable materials
-
glass breakage as a result of
mechanical shaking power.
Reduce the speed if:
- the medium splashes out
of the vessel because the
speed is too high
- the instrument is not run-
ning smoothly
- the instrument begins to
move around because of
dynamic forces
- an error occurs.
Do not touch rotating
parts during operation!
• Never cover the ventilation slots or cooling ns
on the motor or on the instrument.
• Avoid knocking and impacting on the lower end
of the shaft and the chuck gear teeth. Even minor, invisible damage can lead to imbalance and
uneven shaft action.
• Ensure that the stand does not start to move.
•
Imbalance of the output shaft, the chuck and
in particular the stirring tools can lead to uncontrolled resonant vibrational behavior of the
instrument and the whole assembly. Glass apparatus and stirrer containers can be damaged
or shattered by this. It can cause injury to the
operator, also can damage the rotating stirring
tool. In this case exchange the stirring tool for
one without imbalance or remedy the cause of
the imbalance.
it to the dealer or the manufacturer along with
a description of the fault.
• If the instrument is operated too long in overload or if the ambient temperature is too high,
the instrument switches off permanently.
• The machine must only be opened by trained
specialists, even during repair. The instrument
must be unplugged from the power supply before opening. Live parts inside the instrument
may still be live for some time after unplugging
from the power supply.
WARNING
If there is still imbalance, return
Covering or parts that are capable of being removed from
the unit without accessory
equipment have to be reattached to the unit for safe
operation in order to prevent, for example, the ingress
of fluids, foreign matter, etc..
• There may be electrostatic activity between the
medium and the output shaft which could cause
a direct danger.
• After an interruption in the power supply or a
mechanical interruption during a stirring process, the unit restart automatically.
• It is important to note that the surfaces of the
motor (cooling fins) and certain parts of the
bearing may get very hot during operation.
WARNING
The unit must be switched
off (motor standstill) before changing to another
gear speed, otherwise the
toothed gears in the reduction stage will be damaged.
6
Correct use
• Use
For mixing/stirring liquids with low to high viscosity by using various stirring tools.
Intended use: Stand device (Chuck downward).
• Range of use (indoor use only)
- Laboratories - Schools
- Pharmacies - Universities
Unpacking
• Unpacking
- Please unpack the device carefully
- In the case of any damage a detailed report must
be sent immediately (post, rail or forwarder)
This equipment is suitable for use in all areas except:
- Residential areas
-
Areas that are connected directly to a low-voltage
supply network that also supplies residential areas.
The safety of the user cannot be guaranteed:
- If the instrument is operated with accessories
that are not supplied or recommended by the
manufacturer
- If the instrument is operated improperly or contrary
to the manufacturer’s specifications
- If the instrument or the printed circuit board are
modified by third parties.
• Delivery scope
- an
RW 28 digital overhead stirrer
- an operating instructions.
- an extension arm
- a hexagonal socket screw
- a hexagon socket offset screw key
- a chuck key
- a warranty card
.
Useful information
The speed can be infinitely adjusted between 60
and 1400 rpm 50 Hz; 72 and 1680 rpm 60 Hz.
The machine can be operated continuously and
warms up during operation. The generously proportioned cooling surfaces enable distribution
transference of heat to be as even as possible.
and
Drive
The motor can be infinitely adjusted via a friction
wheel drive unit but is operated in one position
only. The power output, rotational speed and
torque of the motor are regarded as constant and
are optimized for this operating position. After
the friction wheel drive the motor power output
is transmitted to the output shaft of the stirrer via
either the first or second stage of the subsequent
manually adjustable toothed gear train.
The two meters long mains lead makes it possible
to work on stands - even with high glass apparatus
under vapor extraction hoods - without extension
leads.
The precision stirrer shaft is designed as a hol
shaft to allow the stirrer shanks to be in serted.
Neglecting all losses, the power at the output shaft
during power transmission (conversion) is always as
great as the power output of the motor. The gear
train merely provides rpm and torque conversion,
which can be described in purely theoretical terms
by the characteristic curve plotted in Fig. 2.
Friction wheel wear is kept low by a helical clutch
matched to the gear train. The down-pressure required at the friction wheel is adjusted by the helical
clutch according to the moment acting on the stirrer
shaft. A low torque results in a low down-pressure;
a high torque results in a high down-pressure.
low
7
Motor circuit breaker
The ball race capacitor motor (degree of protection IP 42) is maintenance free. In its winding it
carries a special overheating circuit breaker (selflocking temperature limiter) which shuts down
the motor permanently if the permissible motor
temperature is exceeded.
This special type of circuit breaker is used when
the automatic reactivation of the protected unit
after overheating is undesirable or impermissible.
The principle of the temperature limiter is that of a
switch that heats up and isolates the motor from
the power supply when the maximum permissible
temperature is reached.
Gear speed change
(Fig 3)
After the locking knob (D, see Fig. 1) on the left
side of unit is pulled, the gears could be taken out of
mesh by turning in counterclockwise direction to the
bearing bushing on the black knurled surface (E, see
Fig. 1)
above the chuck. The centre axis of the stirring apparatus is thus shifted in a radial direction.
The bearing bushing is then axially positioned up or
down in accordance with the range which is to be
set. The gears are put back into mesh by turning the
bearing bushing back (clockwise) and the centre axis
of the agitator is swiveled into the original position
until the locking knob (D, see Fig. 1) catches.
When the self-locking temperature is exceeded,
Er 4 is shown on the display (see section “Error
codes“).
In this case the unit can only be switched back on
after it has been switched off for approx. 4-5 minutes by pressing the rocker switch (A, see Fig. 1)
on the front or by disconnecting the mains plug.
After this short cooling, the contacts in the current
circuit are closed again and the unit is operational
once more.
It should be necessary to change the gear speed
in the course of setting up an experiment or process with glass apparatus, then attention must be
to the movement of the stirrer element by
paid
the ec
centric bearing bush and to the movement
in
the axial direction. If this is unacceptable, the
stirrer
element must be loosened in the chuck.
DANGER
Only change the gear position at standstill!
Output shaft
The clamping chuck and output shaft permit clamping IKA® recommend stirrer tools (see “Permitted
IKA® Stirrer tools“ section).
The output shaft is de
and the opening on the top side of the housing is
closed with a stirrer cover. When the stirrer cover is
opened, it is possible for stirring shaft to be pushed
out over the top edge of the housing at standstill,
e.g. during changing container.
signed as a hollow shaft,
Speed display
The rotation speed is adjusted by means of the
rotary knob (B, see Fig. 1) on the side of the
overhead stirrer.
For safety reason, the stirrer cover
back into the opening of the housing
properly closed. This is the only way to ensure that
working with the unit is safe and that media cannot
enter the instrument.
DANGER
The rotational speed is displayed directly in revolutions per minute (rpm) on the display (C, see Fig. 1).
Please see section “Safety
instructions“!
must be pushed
so that it is
8
Commissioning
Assemble the overhead stirrer and all necessary
accessories on a stable, even, non-slip surface.
The RW 28 digital overhead stirrer must be secured to a stable stand (e.g. R 2722 or R 2723)
with a cross-sleeve (e.g. R 271). The stirring vessel
must always be securely fixed for safety reasons.
You must also ensure that the mounting device
(stand) is set up in such a way that it is not liable
to topple and does not start to move during the
stirring procedure.
Securing
Securing extension arm to the overhead stirrer
Diagram (see Fig. 4)
Ensure that the extension arm is fitted securely.
Vibration may cause the screw to become loose. It
is therefore necessary for safe use to occasionally
check that the extension arm is attached securely.
Tighten the hexagon
Securing
Diagram (see Fig. 5)
Attach the cross sleeve (H) to the upright of the
stand (I). Attach the extension arm (J) to the side
of the cross sleeve not in use, with the opening
facing upwards.
Tighten both clamping bolts (G) firmly once the
desired position for the stirring procedure has
been adjusted correctly.
Check that the stirrer is held in position firmly prior to
each use and also at regular intervals. The position of
the stirrer must only be adjusted when the equipment
is stationary and the power supply is disconnected.
Securing
Diagram (see Fig. 6)
Slide the stirring tool (M) into the chuck (L). Tighten
the chuck rmly using the chuck key (K).
The stirring tool must only be changed when the
equipment is stationary and the power supply is disconnected.
the stirrer to the stand
a stirring element using the chuck
socket screw
as required.
Accessories must be assembled according to the
following assembly instructions (Fig. 4 to
If above conditions are
met, the instrument is
ready for operation after plugging in the mains
plug.
Securing
Diagram (see Fig. 7)
Use a stirring shaft protector (Q), e.g. R 301, to
provide protection against injury when working
with the equipment. Use the bolts (U) to attach the
plastic half-shell pieces to the stirrer (T), as shown
in Fig. 7. The screw (S) can be used to adjust the
length of the stirring shaft protector.
Check that the stirring shaft protector is held in position securely prior to each use and also at regular
intervals. The position of the stirring shaft protector must only be adjusted when the equipment is
stationary and the power supply is disconnected.
Securing
D
iagram
First fix the cross sleeve (H) to the stand (I).
Then attach the bracket (Z) of the strap clamp
in the open side of the cross sleeve which is facing upwards according to the position of stirrer
and the mixing vessel (V), firmly tighten the two
clamping bolts (G).
Clamp the mixing vessel (V) with the flexible
clamping band (W) and secure the flexible band
(W) by means of the clamping lever (X).
the stirring shaft protector
the mixing vessel to the stand
(see Fig. 8)
Fig. 8).
9
Switching on the device
Check whether the voltage given on the type plate
corresponds to the available mains voltage.
The socket used must be
earthed (fitted with earth
contact).
If these conditions have been met, the machine is
ready to operate when the mains plug is plugged in.
If these conditions are not met, safe operation is not
guaranteed and the machine could be damaged.
During commissioning of the machine the output
shaft starts to run at the last speed set. Therefore
check the setting of the control knob (B). Also
ensure that the speed set is suitable for the test
medium selected.
Maintenance and cleaning
The equipment is maintenance-free. It is only subject to the natural wear and tear of components
and their statistical failure rate.
Cleaning
For cleaning disconnect
the main plug!
Use only cleaning agents which have been approved by IKA® to clean the instrument.
Dirt Cleaning agent
Dye isopropyl alcohol
Construction material
Cosmetics water containing tenside/
Foodstuff
Fuel
For materials which are not listed, please request
information from
Wear protective gloves during cleaning the instrument.
Electrical devices may not be placed in the cleansing
agent for the purpose of cleaning.
Do not allow moisture to get into the equipment
when cleaning.
water containing tenside/
isopropyl alcohol
isopropyl alcohol
water containing tenside
water containing tenside
IKA®.
If in doubt, set the speed knob to the lowest
speed. In case of doubt use the rotary knob (B, see
Fig. 1) to set the lowest speed and set the drive at
the lowest speed position (back side, refer to the
attachment on side of overhead stirrer).
The unit starts to run when the rocker switch (A
Fig. 1
) is switched to I position.
If the unit has not been used for some time, a knocking noise will be heard when switching on, which is
due to the preload on the friction lining of the friction wheel drive. This has no detrimental effect on
the function of the unit, and the knocking noise will
disappear after a short running-in period.
When cleaning the unit, take particular care not
to bring substances containing oil or grease into
contact with the running surfaces of the cone pulley and the friction wheel. This would substantially
reduce the frictional coecient resulting from the
pairing of the friction wheel and cone pulley materials, and would impair power transmission in
the unit.
Spare parts order
When ordering spare parts, please give:
- machine type
- manufacturing number, see type plate
-
item and designation of the spare part see
www.ika.com, spare parts diagram and spare
parts list
- software version.
Repair
Please send equipment 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” form IKA® or use the download
printout of it from IKA® website: www.ika.com.
If you require servicing, return the equipment in its
original packaging. Storage packaging is not sucient. Please also use suitable transport packaging.
, see
Before using another than the recommended
method for cleaning or decontamination, the user
must ascertain with
not destroy the instrument.
IKA® that this method does
10
Error codes
The fault is shown by an error code on the display (C) as following if the error occurs, e.g. Er 4.
Proceed as follows in such cases:
Switch the device switch (A) off.
F
F Remove the stirrer tool and remove the instrument from the assembly.
F Reduce the speed and switch on (instrument switch (A)) the device without the stirrer tool.
Error code Cause Effect Solution
Er 4 Motor blockage or overload motor off - Switch off the instrument
- Decrease the motor’s load and restart again
Er 8
If the actions described fails to resolve the fault or another error code is displayed then take one of the
following steps:
- Contact the service department
- Send the instrument for repair, including a short description of the fault.
Speed sensor fault or overload
motor off - Switch off the instrument
Warranty
In accordance with
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.
IKA® warranty conditions, the
Accessories
R 2722 H-Stand
R 2723 Telescopic stand
R 270 Cross sleeve
R 271 Cross sleeve
Permitted IKA
max. speed
(rpm)
R 1345 Propeller stirrer ≤ 800
R 1385 Propeller stirrer ≤ 800
R 1388 Propeller stirrer ≤ 400
R 1313 Turbine stirrer ≤ 800
R 1300 Dissolver stirrer ≤ 2000
R 1302 Dissolver stirrer ≤ 1000
The warranty does not cover worn out parts, nor
does it apply to faults resulting from improper use,
insucient care or maintenance not carried out in
accordance with the instructions in this operating
manual.
RH 5 Strap clamp
FK 1 Flexible coupling
R 301 Stirrer shaft protection
R 301.1 Support holder
®
stirrer tools
max. speed
(rpm)
R 1355 Centrifugal stirrer ≤ 800
R 1375 Paddle stirrer ≤ 800
R 1376 Paddle stirrer ≤ 800
R 1331 Anchor stirrer ≤ 1000
R 1333 Anchor stirrer ≤ 800
11
Technical data
Speed range (50 Hz stage I)
(50 Hz stage II)
(60 Hz stage I)
(60 Hz stage II)
rpm 60 − 400
240 − 1400
72 − 480
288 − 1680
Speed adjustment Stepless
Speed display Display (LED)
Speed setting accuracy rpm ± 1
Speed measurement deviation rpm ± 10
Max. torque at stirrer shaft Ncm 1144 (with 60 rpm)
900 (with 100 rpm)
86 (with1000 rpm)
Maximum stirring quantity (water) ltr 80
Max. viscosity mpas 50000
Permitted on-time % 100
Nominal voltage VAC 230 ± 10% (EURO)
115 ± 10% (USA)
Frequence Hz 50 / 60
Input power (motor) 50 Hz
60 Hz
Output power (motor) 50 Hz
60 Hz
Output power shaft
W 220 (EURO)
300 (USA)
W 90 (EURO)
94 (USA)
W 90
(measured at 400 rpm in stage I, 230V 50 Hz)
Protection type to DIN EN 60529 IP 40
Protection class I (protective earth)
Excess voltage category II
Contamination level 2
Protection at overloaded Yes / temperature sensor in motor winding
Fuse (on mains plate)
220 − 240 VAC, 50 / 60 Hz
100 − 120 VAC, 50 / 60 Hz
A
T 4 A (IKA
T 6,3 A (IKA
®
Ident. No. 2820500)
®
Ident. No. 1408000)
Ambient temperature °C + 5 to + 40
Ambient humidity (rel.) % 80
Drive Rib cooled capacitor motor with friction wheel
drive and subsequent 2-stage toothed gear train
Clamping chuck − clamping range mm 1 − 10
Hollow shaft internal diameter (Ø) mm 10,5
Extension arm (Ø x L) mm 16 x 145
Housing Coated aluminium casting and thermoplastic
plastic
Dimension (W x D x H) (without extension arm) mm 123 x 252 x 364
Weight (with extension arm and clamping chuck)
kg 7,5
Operation at a terrestrial altitude m max. 2000
Subject to technical changes!
12
IKA® - Werke GmbH & Co.KG
Janke & Kunkel-Str. 10
D-79219 Staufen
Tel. +49 7633 831-0
Fax +49 7633 831-98
sales@ika.de
www.ika.com
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