IKA 3593001 User manual

20000009893

RW 20 digital_022016

IKA® RW 20 digital

Operating instructions EN

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min

min

min

®

IKA

RW 20 digital

C

rpm

min max

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 output shaft

PM; P

W

n

Motor speed

M

n

Speed of output shaft

W

Torque of output shaft

M

W

M

Torque 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

Couple de l'arbre de sortie

W

Couple du moteur

M

M

P

= PW

M

max

max

max

A

Fig. 1

E

nM

n

M

M

W

W

M

Fig. 2

II I

Fig. 3

2

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G

H

J

K

L

G

I

Fig. 4 Fig. 5

T

U

U

S

Q

Fig. 6

M

Y

X

I

W

V

Fig. 7

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Fig. 8

3

Source language: German

EN

Contents

Page

Declaration of conformity 4
Explication of warning symbols 4
Safety instructions 5
Correct use 6
Unpacking 7
Useful information 7
Drive 7
Motor circuit breaker 7
Gear speed change 8
Output shaft 8
Speed display 8
Commissioning 8
Securing 8
Switching on the machine 9
Maintenance and cleaning 9
Error codes 10
Warranty 10
Accessories 10
Permitted IKA
Technical data 11

®

stirrer tools 10

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 following standards or standardized documents: EN 61010-1, EN 61010-1-2-051,
EN 61326-1,

EN 60529 and EN 12100.

Explication of warning symbols

DANGER

Indicates an (extreme) hazardous situation, which, if not avoided, will result in death,
serious injury.

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

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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 insuciently 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, IKA
additional appropriate measures to ensure safety in the
experiment. For example, users can implement measures
that inhibit fire or explosions or comprehensive monitor­ing equipment. Furthermore, users must make sure that
the OFF switch of the IKA® product can be accessed
immediately, directly and without risk at any time, and
above all, in case of fault.

CAUTION

switch that can be easily accessed must be installed in
the work area.

• 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.

• 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 20 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.

If mains switch cannot ensure
this access at all times, an ad­ditional EMERGENCY STOP

®

recommends to use

• You must ensure that the stirring element is securely
clamped in the chuck!

WARNING

• Use stirring shaft protective equipment!

• The agitated vessels used for stirring have to be secured.
Consider on a good stability of the entire structure.

WARNING

• 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 accessories de­scribed in the ”Accessories” section.

• Always switch the mains switch in the OFF position 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.

WARNING

body, hair, jewelry or items of clothing cannot be trapped
by the rotating parts.

WARNING

insert through the stirring tool over the upper edge of
housing at standstill.

Remove the chuck key from
the chuck before turning on
the device.

Please pay attention to the dan­gerous parts of the equipment in
Fig. 8.

Never operate the instrument
with the stirrer tools rotating
freely. Ensure that parts of the

The operation of a free rotating
shaft end is dangerous. There­fore, for safety reasons, only

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WARNING

dium to be processed. Otherwise there is a risk of:

- splashing of liquids

- projectile parts

- body parts, hair, clothing and jewelry getting caught.

Wear your personal protective
equipment in accordance with
the hazard category of the me-

Beware of the risk of:

NOTICE

- flammable materials

- glass breakage as a result of mechanical shaking power.

Reduce the speed if:

NOTICE

- the medium splashes out of the vessel because the
speed is too high

- the instrument is not running smoothly

- the instrument begins to move around because of dy­namic forces

- an error occurs.

• 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. If there is
still imbalance, return 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

• There may be electrostatic activity between the medium
and the output shaft which could cause a direct danger.

• 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.

• Never cover the ventilation slots or cooling fins on the
motor or on the instrument.

Do not touch rotating parts
during operation!

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

NOTICE

ment have to be reattached to the unit for safe opera­tion in order to prevent, for example, the ingress of fluids,
foreign matter, etc..

NOTICE

the toothed gears in the reduction stage will be damaged.

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.

Covering or parts that are capa­ble of being removed from the
unit without accessory equip-

The unit must be switched off
(motor standstill) before changing
to another gear speed, otherwise

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Unpacking

• Unpacking:

- Please unpack the device carefully.

- In the case of any damage a detailed report must be
sent immediately (post, rail or forwarder).

Useful information

The speed can be infinitely adjusted between 60 and 2000
rpm 50 Hz; 72 and 2400 rpm 60 Hz. The machine can be
operated continuously and
The generously pro
tribution

and transference of heat to be as even as possible.

portioned cooling surfaces enable dis-

warms up during operation.

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.

• Delivery scope:

-

RW 20 digital overhead stirrer

- user guide

- chuck key

- warranty card

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
low 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 down­pressure.

.

low shaft to al-

Motor circuit breaker

The ball race capacitor motor is maintenance free. In its wind­ing it carries a special overheating circuit breaker (self-locking
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.

When the self-locking temperature is exceeded, Err. 5 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.

7

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Gear speed change

(Fig 3)
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)
the stirring device is thus shifted in a radial direction.
bearing bushing is then axially positioned up or down in ac­cordance with the range which is to be set
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 bearing bush engages again.

above the chuck. The centre axis of

The

. The gears are put

Output shaft

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 paid
of the stirrer element by the ec
the movement in
the stirrer

element must be loosened in the chuck.

the axial direction. If this is unacceptable,

WARNING

centric bearing bush and to

Only change the gear position
at standstill!

to the movement

The clamping chuck and output shaft permit clamping IKA®
recommend stirrer tools (see “Permitted IKA® Stirrer
tools“ section).
The output shaft is designed as a hollow shaft, 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.

For safety reason, the stirrer cover must be pushed back
into the opening of the housing so that it is properly closed.
This is the only way to ensure that working with the unit is
safe and that media cannot enter the instrument.

NOTICE

Please see section “Safety in­structions“!

Speed display

The rotation speed is adjusted by means of the rotary knob (B, see Fig. 1) of the overhead stirrer.
The rotational speed is displayed directly in revolutions per minute (rpm) on the display (C, see Fig. 1).

Commissioning

Assemble the overhead stirrer and all necessary accessories
on a stable, even, non-slip surface. The RW 20 digital over­head stirrer must be secured to a stable stand with a cross­sleeve. 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.

Accessories must be assembled according to the
assembly instructions (Fig. 4 to

If above conditions are met, the in­strument is ready for operation after
plugging in the mains plug.

Fig. 8).

following

Securing

Securing

Diagram (see Fig. 4)
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.

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the stirrer to the stand

Securing

a stirring element using the chuck

WARNING

Diagram (see Fig. 5)
Slide the stirring tool (M) into the chuck (L). Tighten the chuck
firmly using the chuck key (K).
The stirring tool must only be changed when the equipment is
stationary and the power supply is disconnected.

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Remove the chuck key from
the chuck before turning on
the device.

8

Securing

Diagram (see Fig. 6)
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. 6. 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.

the stirring shaft protector

Switching on the device

Securing

D
First fix the strap clamp (X) to the stand (I). Adjust the strap
clamp (X) position according to the position of stirer and mi­xing vessel (V) before tighten the clamp bolt (Y).
Clamp the mixing vessel (V) with the flexible clamping band
(W).

the mixing vessel to the stand

iagram

(see Fig. 7)

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. 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 water containing tenside/

isopropyl alcohol

Cosmetics water containing tenside/

isopropyl alcohol
Foodstuff water containing tenside
Fuel water containing tenside

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.

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
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.

Before using another than the recommended method for
cleaning or decontamination, the user must ascertain with

IKA® that this method does not destroy the instrument.

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 coecient 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

- serial number, see type plate

-

item and designation of the spare part see

e parts diagram and spare parts list.

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

If you require servicing, return the equipment in its original
packaging. Storage packaging is not sucient. Please also
use suitable transport packaging.

, see Fig. 1

) is

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Error codes

The fault is shown by an error code on the display (C) as following if the error occurs, e.g. Err. 5.
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
Err. 5 Motor overload motor off - Switch off the instrument

- Decrease the motor’s load and restart again

Err. 4

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.

Motor blocked or overloaded

motor off - Switch off the instrument

Warranty

In accordance with
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 warranty

Accessories

R 1825 Stand
R 1826 Stand
R 1827 Stand
R 182 Cross sleeve

Permitted IKA® stirrer tools

recommended speed
(rpm)

R 1311 Turbine stirrer ≤ 2000
R 1312 Turbine stirrer ≤ 2000
R 1342 Propeller stirrer ≤ 2000
R 1381 Propeller stirrer ≤ 2000
R 1382 Propeller stirrer ≤ 2000
R 1389 Propeller stirrer (PTFE) ≤ 800
R 1300 Dissolver stirrer ≤ 2000
R 1303 Dissolver stirrer ≤ 2000
R 1330 Anchor stirrer ≤ 1000
R 1352 Centrifugal stirrer ≤ 2000

The warranty does not cover worn out parts, nor does it
apply to faults resulting from improper use, insucient care
or maintenance not carried out in accordance with the in­structions in this operating manual.

RH 3 Strap clamp
FK 1 Flexible coupling
R 301 Stirrer shaft protection
R 301.1 Support holder

recommended speed
(rpm)

R 3000.1 Moebius stirrer ≤ 800
R 3001.1 Moebius stirrer ≤ 800
R 3003 Spiral stirrer ≤ 800
R 3003.1 Spiral stirrer ≤ 800
R 3003.2 Spiral stirrer ≤ 800
R 3004 Blade stirrer ≤ 1000
R 3004.1 Blade stirrer ≤ 1000
R 3004.2 Blade stirrer ≤ 1000

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Technical data

Speed range: (50 Hz stage I)
(50 Hz stage II)
(60 Hz stage I)
(60 Hz stage II)

Speed adjustment Stepless

Speed display Display (LED)

Speed setting accuracy rpm ± 1

Speed measurement deviation rpm ± 30

Max. torque at stirrer shaft:
(
(

Maximum stirring quantity (water) ltr 20

Max. viscosity mpas 10000

Permitted on-time % 100

Nominal voltage VAC 230 ± 10 % / 115 ± 10 %

Frequence Hz 50 / 60

Input power

Output power W 35

Output power shaft
(measured at 400 rpm in stage I, 230V 50 Hz)

Protection type to EN 60529 IP 20

Protection class I (protective earth)

Excess voltage category II

Contamination level 2

Protection at overloaded Yes / temperature sensor in motor winding

Ambient temperature °C + 5 ... + 40

Ambient humidity (rel.) % 80

Drive Rib cooled capacitor motor with friction wheel drive and

Clamping chuck − clamping range mm 0.5–10

Hollow shaft internal diameter (Ø) mm 10.5

Extension arm (Ø x L) mm 13 x 160

Housing Coated aluminium casting and thermoplastic plastic

Dimension (W x D x H) (without extension arm) mm 88 x 212 x 294

Weight (with extension arm and clamping chuck)

Operation at a terrestrial altitude m max. 2000

(at 60 rpm)

at 100 rpm)
at 1000 rpm)

rpm 60–500

240–2000
72–600
288–2400

Ncm 300 (overload)

150
24

W 72 (230 V / 50 Hz)

87 (115 V / 60 Hz)

W 35

subsequent 2-stage toothed gear train

kg 3.1

Subject to technical changes!

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