IKA RET control-visc User manual

20000004159
RET control-visc_042018
IKA®RET control-visc

20
EN
Contents
Page
Controls and display 2
Declaration of Conformity 20
Warranty 20
Explication of warning symbols 20
Safety instructions 21
Unpacking 22
Correct use 22
Assembling the support rod 22
Setting the safety temperature limit 23
Operation 24
Explication of warning symbols
DANGER
CAUTION
WARNING
This symbol indicates information which is essential for your health. Failure to observe this information
may be detrimental to health or may result in injuries.
This symbol indicates information which is important for ensuring that the device functions without
any technical problems.
Failure to observe this information could damage the device.
This symbol indicates information which is important for proper use of the device and/or ensur-
ing that the device functions correctly. Failure to observe this information can lead to inaccurate
results.
ATTENTION - risk of damage due to magnetism.
DANGER - note on hazards arising from a hot surface.
General hazard
ATTENTION
DANGER
Declaration of Conformity
We declare under our sole responsibility that this product is in compliance with the regulations 2014/35/EU, 2006/42/EC, 2014/30/EU
and 2011/65/EU and conforms to the standards or normative documents: EN 61010-1, EN 61010-2-010, EN 61010-2-051, EN 61326-1,
EN 60529 and EN ISO 12100.
A copy of the complete EU Declaration of Conformity can be requested at [email protected].
Warranty
According to IKA®’s Terms and Conditions of sale and delivery, this product is covered by a warranty for a period of 24 months. In case
of making a warranty claim, please contact your local dealer or, if you wish, you can send the device directly to our factory. Please include
the sales invoice and state the reasons for your guarantee claim. In this case, you are responsible for shipping and handling costs.
The warranty does not cover wearing parts, nor to defects that are the result of improper use, insucient care and maintenance or failure
to follow the instructions in this operating manual.
Menu(overview) 25
Connections and interfaces 30
Accessories 32
Troubleshooting 33
Maintenance and cleaning 34
Technical data 34
Source language: German

21
WX
>100 mm WX
WX
>100 mm
>100 mm
Safety instructions
• Please read the instruction manual in full before use and
follow the safety instructions.
• Keep the instruction manual in a place where it can be accessed
easily.
General instructions
•
Ensure that only trained staff use the device.
• Be sure to comply with all safety instructions, directives and all
matters of health, safety and accident prevention in the workplace.
• The plug must be earthed (grounded contact).
Caution - magnetism!
Beware of possible effects from the mag-
netic field (pacemakers, data media, etc.).
Burns hazard!
Exercise caution when touching housing
components and the heating plate. The
heating plate can reach temperatures of up to 320 °C. Watch for
residual heat after appliance has been switched off.
The device should only be transported once it has cooled!
Device configuration
Do not operate the device in explosive at-
mospheres, in the presence of hazardous
materials or under water.
• Install the device on a flat, stable, clean, non-slip, dry and fire-
resistant surface.
• The device feet must be clean and undamaged.
• The power supply cable and cables to the external sensors must
not be allowed to come into contact with the heated mounting
plate.
• Prior to each use, always check the device and accessories for
damage. Never use damaged parts.
Permissible media / Contamination / Side reactions
Caution! Only media whose flash point
lies above the set safety temperature lim-
it (50 °C- 380 °C) may be processed or
heated with this device.
The set safety temperature limit must be at least 25 °C below the
fire point of the medium in use.
Pay attention to the risks associated with:
- flammable materials
- flammable media with low steam pressure
- glass breakage
- incorrect vessel size
- overfilling of medium
- unstable vessel.
• Only process pathogenic materials in closed vessels under a suit-
able extractor hood. Please contact IKA®if you have any ques-
tions.
Only work with media for which the en-
ergy input during processing is harmless.
This also needs to take into account other
sources of energy such as, for example, light irradiation.
• At high speeds the mounting plate is liable to warming, even if
the device is not in heating mode.
• Bear in mind the possibility of contamination or unwanted chem-
ical reactions.
• There is the possibility that friction from rotating accessory parts
can result in contamination of the medium being processed.
• Bear in mind the following when using PTFE-coated magnetic
rods: Chemical reactions of PTFE occur in contact with molten
or solute alkali metals and alkaline earth metals as well as with
fine powders of metals in groups 2 and 3 of the periodic table
ATTENTION
DANGER
at temperatures above 300 - 400 °C. Only elementary fluorine,
chlorine trifluoride and alkali metals attack it; halogenated hy-
drocarbons have a reversible swelling effect.
(Source: Römpp “Chemie-Lexikon” and “Ullmann” Vol. 19)
• Only glass-coated magnetic rods should be used in conjunction
with solute alkali metals or alkaline earth metals or at tempera-
tures above 250 °C.
Performing trials
Always wear personal protective equip-
ment in accordance with the hazard class
of the media being worked with.
Otherwise there is the risk of the following:
- spraying and evaporation of liquids
- ejection of parts
- release of toxic or inflammable gases.
• If any of the following happens, reduce the speed:
- medium sprays out of vessel due to excessive speed
- process is not smooth
- vessel moves around on the mounting plate.
Accessories
• Safe operation can only be ensured when working with acces-
sories as described in the “Accessories” section.
• Only put together accessories with the power supply cable dis-
connected.
• Refer to the operating instructions for the accessories.
• Ensure that the external temperature sensor is inserted into the
medium to a depth of at least 20 mm when connected.
• Accessories must be connected securely to the device and must
not come loose on their own. The centre of gravity of the device
must be located within the mounting plate.
Power supply / switching off the device
• The specified settings on the rating plate must coincide with the
actual power supply.
• The plug for the power supply connection must be easy to access
and remove.
• The device is only disconnected from the power supply when the
power or device plug is removed.
After an interruption to the power supply,
the device starts up again in Mode B.
Protection of the device
• The device must only be opened by trained, skilled personnel.
• Do not cover the device, even partially, with elements such as
metallic plates or sheets otherwise it may overheat.
• Avoid knocks or impact to the device or accessories.
• Ensure the mounting plate remains clean.
•
Observe minimum distances between devices. Between device
and wall should be 100 mm (min), above the assembly should be
800 mm (min).
WARNING
DANGER
WARNING
WARNING
DANGER
WARNING

22
Unpacking
• Unpacking
- Unpack the device carefully
- Any damage should be notified immediately to the shipping
agent (post oce, railway network or transport company)
• Scope of delivery
- RET control-visc heated magnetic stirrer
- Power supply cable
- Operating instructions
- Screwdriver (safety circuit)
- USB cable
Correct use
Assembling the support rod
Note:
When using bath attachments with a diameter over 180 mm,
please use support rod in conjunc-
tion with an extension. (See “Ac-
cessories”)
• Use
- for mixing and/or heating liquids.
• Area of use (only indoors)
- laboratories - schools
- pharmacies - universities
The device is suitable for use in all areas apart from domestic areas
and areas directly connected to a low-voltage supply which also
serves domestic areas.
The safety of the user cannot be guaranteed if the device is used
in conjunction with accessories which are not supplied or recom-
mended by the manufacturer, if the device is used contrary to the
intended purpose against the manufacturer’s instructions or if the
device itself or PCB has been subjected to modifications by third
parties.
• Remove the threaded plug (P)
• Remove the protective cap from the
support rod
• Place the washer between the hous-
ing and the nut
• Screw in the support rod manually
until it cannot be tightened further
• Tighten the nut using an SW17 open-
end spanner
• Assemble the accessories using a
cross sleeve
- Protective cover: H 104
- Magnetic stirring bar: IKAFLON 30 and 40 mm
- Temperature sensor: PT 100.70
- O Ring
Please slide the O-Ring on the power cord plug to avoid ingress of
water into the connector.
O-Ring
Risk of tipping!
Make sure that the center of mass
of the attached device does not
protrude over the safe area indicat-
ed with a dotted rectangle.
safe area
DANGER

23
Setting the safety temperature limit
The maximum achievable heating plate temperature is restricted
by an adjustable safety temperature limit. Once this limit has been
reached, the device stops heating.
The safe temperature limit must
always be set at least 25 °C lower
than the fire point of the media to
be processed!
The adjustable maximum heating plate temperature is at least 10
°C under the set safety temperature limit.
Setting range: [50 °C] to [max. SET temperature + 50 °C]
Factory setting: [max. SET temperature + 50 °C]
Setting the safety temperature limit
After switching on the device, the safety temperature limit (7) can
be adjusted using a screwdriver.
Do not turn the setting screw beyond the clockwise or anticlock-
wise stop. This will cause irreparable damage to the potentiometer.
• Set the main switch (A) to the ON position
• Using the screwdriver supplied, turn the “Safe Temp” setting
screw (B) to the clockwise stop.
• Use the temperature rotary knob (C) to set the target temperatu-
re to the desired “Safe Temperature” and wait until the tempera-
ture is achieved.
• Turn the “Safe Temperature” setting screw (B) slowly anticlo-
ckwise until the heating function switches off and the display
shows Er 25 .
• The “Safe Temp” value (7) is displayed on the screen.
Setting the safety temperature limit as to
be done as described.
The value “Safe Temperature” shown on
the display only serves for visualization.
Functional test: safety circuit switch-off
• Heat the device to a temperature of over 50 °C.
• Set the safety temperature limit as far to the left as possible (50
°C) and set the mains switch (A) to the ON position.
• The display will show: Er 25
WARNING
WARNING

24
Remove the protective film from the mounting plate before use! The “Back” menu key is used to change between menu items.
Start-up
Stirring
Heating
Connecting an ex-
ternal thermometer
(direct temperature
control in the me-
dium)
Weighing
pH measurement
Timer
)Set the main switch (A) to the OFF position
)Insert the power supply cable into the mains socket (K)
)Set the main switch (A) to the ON position
DStandard mode A is selected (see “
Menu (details) ”)
)Set the speed using the rotary knob (D)
DThe set value is shown on the display (J)
)Press the rotary knob (D) to start the stirring function
LDThe symbol (16) appears when the motor is active
)Set the safety temperature limit (see “
Menu (details) ”)
)Set the target temperature using the rotary knob (C)
DThe set value is shown on the display (J)
)Set the temperature control mode (see “
Menu (details) ”)
)Press the rotary knob (C) to start the heating function
The target and current temperature are shown permanently on the display (J):
LDWhen the heating function is switched on, the heating symbol (4) is displayed.
The maximum adjustable heating plate temperature setting is 340 °C
LDWhenever the mounting plate is at a temperature above 50 °C, the display (J) shows and the current tempera-
ture is shown, even if the device is switched off.
)Set the main switch (A) to the OFF position
)Connect the safety contact thermometer compliant with DIN 12878 Class 2 or temperature sensor PT 100 (individual
sensor) or PT 1000 (double sensor) to socket (L)
)Set the main switch (A) to the ON position
LTemperature sensor PT 100 DThe current temperature (5) for the temperature sensor shown on the
display(J) corresponds to the temperature of the medium. The “Exter-
nal temperatureprobe” symbol (11) appears.
L  Temperature sensor PT 1000 DThe current temperature (5) for the temperature sensor shown on the
display(J) corresponds to the temperature of the medium. The “Exter-
nal temperatureprobe” symbol (11) appears. The temperature of the
carrier fluid (3) is also displayed.
)Press the (G) key
)Wait until the system is stable (once the system is stable, a “g” appears after the digit 0).
)Place the weight in the centre of the heating plate and wait until the system is stable again.
LDThe maximum display range is up to 2000g
DThe weighing range is max. 5000g
DIt is only possible to use the weighing mode when the heating or stirring functions are not active.
LDThe weighing module can be calibrated.
DSee section entitled “
Menu (details) ”
)Press the (H) key
)Set the time in hours, minutes and seconds by turning the knob (D) and confirm by pressing it; the timer function startsto
count down the remaining time once the heating or stirring function has started (see “
Menu (details) ”).
L
Once the timer reaches 0, the heating function is switched off, even if the motor has only just been started.
If the heating is activated during the timer sequence, only the heating is switched off, but the motor continues
torun (delay in boiling).
Operation

25
Menu structure
Mode
A ………………………………………………………………….........………….. A
B
…………………………………………………………………….........……….. -
C …………………………………………………………………….........……….. -
Display Torque trend measurement
……………………………………………............. -
pH value
…………………………………………………………………….......... -
Timer
…………………………………………………………………..………….. -
Graph
…………………………………………………………………..………….. -
Factory settings
Menu
Stirring
Torque trend measurement...........………………………………………………… -
Stirring bar decoupling……………………………………………………………..
-
Intermittent Mode Run/Stop …………………………………........ -
Interval Run Time …..…………... 00:00 [mm:ss]
Stop Time
………………. 00:00 [mm:ss]
Speed limit…………………………………………………...........……….............
1700 rpm
Heating Control method
Fast PID (fPID)……………………………………... fPID
Accurate PID (aPID)
…………………………….. -
Two - point (2pt) ………………………………... -
Limits Medium limit……………………………………... -
Carrier limit ……………..............……………….. -
Limit information ………………………………... -
Temperature sensor Calibration 2-point Calibration ..………... -
3-point Calibration ………... -
Reset Calibration …..…..............……………….. -
Weighing Measurement
.............……………………………………... ............................ -
Calibration 2-point Calibration……...………………………... 200...5000 g
3-point Calibration
….................……………….. 200...5000 g
Timer Set
………………………………………………………………………………….. 00:00:00 [hh:mm:ss]
Display
…………………………………………………………………………….. -
pH probe Calibration
2-point Calibration……...………………………... -
3-point Calibration ….................……………….. -
Display........................................................... …..…..............……………….. -
Graph Axis Assignment
Temperature……………………………………..... -
Speed ……………………......................……….. -
Torque ……………………………….................... -
pH ……………………………….......................... -
Axis Scaling Automatic……………………………………........ -
Manual ……………..............…………….......….. -
Programs Program 1
…………………………………………….......................................... -
Program 2
…………………………………………………………………….......... -
Program 3
………………………………………………………………….......….. -
Program 4
………………………………………………………………......…….. -
Program 5
………………………………………………………………......…….. -
Menu (overview)

26
Torque trend measurement
The torque trend measurement is used to deduce the change in
viscosity of the reaction medium.
The devices are not designed to measure absolute viscosity. They
only measure and display the relative change in the viscosity of the
medium from a starting point specified by the user.
Once the speed of the motor and magnetic rod in the medium
have stabilised to the target speed, the viscosity measurement is
started at 100%.
Consequently, an increase in the measured torque trend is indicated
by a value > 100% and a reduction in values < 100%.
The value can always be reset to 100% by pressing the “Back” (F)
membrane key.
Note:
Torque trend measurement only works for a constant set
speed for the duration of the measurement.
As a result, intermittent mode cannot be used in
conjunction with torque trend measurement.
Stirring bar decoupling
If the device detects that a stirring bar has broken away, the stirring
function is interrupted temporarily in order to pick up the bar. The
system then returns to the previously set speed. When the system
detects a bar decoupling, this is indicated with a special symbol
(instead of symbol 16). If another stirring bar decoupling
occurs within the next 3 minutes (as long as the target speed has
not been modified), once the bar is recovered the system only goes
up to a speed of 100rpm. In the case of 4 consecutive stirring
bar decouplings-with less than 3 minutes’ normal speed between
them- the error message ER 41 is displayed. The speed is reduced
to 200rpm and the heating is switched off.
In such cases, the testing conditions will need to be reconsidered.
Stirring
Menu (details)
Safety Time Out
Set …………………..…………………………................ 00:30 [mm:ss]
Speed …………………………..…………………............. 100 rpm
Temperature
…………………..…………………............... -
Safe temp confirmation
……..……………………………………..………… -
Er5............
……..…………………………………………………………......… -
Password
……..………………………………………………………………… 000
Settings Languages
Unit Temperature
Display
Sound
Factory Settings
Communication
Information Stirring
……………………………………….... -
Heating
………………………….............…… -
Safety
……………………..…………......…… -
Software
………………………..….…..…….. -
Firmware Update Information
.……………... -
Key Tone
………………………………..…….. -
Background
Firmware Update Information
ºC
………………..……….…….. ºC
ºF
………………………………… -
English
…………………………………………. English
Deutsch
……………………………………..… -
Français
………………………………………… -
Español
………………………………………… -
Italiano
………………………………………… -
日本語
………………………………………… -
穢剳檺……………………………………….... -
ˎ஘
…………………………………....……… ࣜ-
Portuguese
…………………………………… -
русский язык..………………………………… -
···
Bluetooth …………………..……………..… ... -
-
Black ………...…….... Black
White ………………….. -
Change the menu items by turning the rotary knob (D) and confirm by pushing it.
The current control variable is saved as the reference 100% ΔP
and shown on the digital display. The change in the viscosity is
then shown in %. Depending on whether the viscosity increases
or decreases, the percentage rises or falls above or below 100%
respectively.
Eurostar Control RS232 ……..… ............. -
USB
……..… ................. -
Minimum Speed..........
-

27
Intermittent mode
Intermittent mode consists of regular, cyclical interruption of
the stirring function. The run time and interval can both be set.
When switching on the device, the time for each is displayed if
intermittent mode is activated.
Speed limit
The ”Speed limit” menu allows the user to set the desired maximum
upper speed limit for the stirrer. The initial setting is the maximum
permissible speed of the stirrer. If the user changes this setting, the
Wireless Controller saves the new value for future stirring tasks.
If the “Speed limit” has been changed, then the speed can be ad-
justed only within the new range.
Note:
The user is responsible for ensuring the suitability/function
of the stirring bar decoupling monitoring for the current
conditions: stirring bar, speed, vessel, medium, etc.
Stirring bar decoupling monitoring does not work if the stirring
bar already breaks away before the system has reached the
set target speed!
The higher the torque to be transferred, the more safely the stirring
bar decoupling monitoring works.
In a glass beaker with water, the stirring bar decoupling for a bar
from 40mm (d=8 mm) upwards can be seen from 300 - 1200rpm.
Longer stirring bars, larger bar surface areas, e.g. Trika, or higher
speeds increase the torque to be transferred.
Heating
The user is able to set the device to three different methods
depending on their specific needs. The selected temperature
control method is displayed alongside the symbol (11).
Control method
Accurate PID: For use with very sensitive materials which need to
be handled
carefully.
Advantages:
• very accurate warming
of the liquid
• no exceeding the target
temperature
Disadvantages:
• slow heating operating
Fast PID: combines the advantages of the PID and two-point
methods (very fast
heating and high
accuracy; possible
overheating).
Two-point:
For media which is not too sensitive.
Advantages:
• Heating much more
rapid than PID
Disadvantages:
• Possible overheating of
up to 10K
T
Set
t
T
Set
t
Limits
In order to ensure that neither the medium nor the carrier fluid
overheat, the user can set separate temperature limits.
Medium limit:
The ”Medium limit” menu allows the user to set the desired
maximum temperature limit for the medium.
Carrier limit:
The ”Carrier limit” menu allows the user to set the desired
maximum temperature limit for the carrier fluid.
Limit information:
The ”Limit information” menu shows the set medium limit and
carrier limit.
Operation with the PT 1000 double
sensor is indicated on the digital
display by the symbol. One
temperature sensor is located in the
heat carrier and the other is located
in the reaction medium. The set
value temperature (2) refers to the
temperature of the medium. The
heat carrier temperature is shown on
the display as an additional current
temperature with the symbol .
The actual temperature of the reaction
medium is shown as the actual
temperature (5). The heating plate
temperature (and therefore the heat
carrier temperature) are limited by the
actual safety circuit temperature (7).
The reaction medium temperature is
limited by the set temperature limits (carrier/reaction temperature
limit).
Regulation of the temperature of the medium using PT 1000
double temperature sensor
When using the PT 100, the selected temperature control mode is
shown on the digital display by the symbol.
The set value temperature (2) and
the actual temperature (5) shown on
the display refer to the temperature
of the medium. The heating plate
temperature is limited by the actual
safety circuit temperature (7). The
medium temperature is controlled
by means of a microcontroller. The
medium temperature is measured by
the PT 100 temperature sensor and
is heated up as quickly as possible
without overshooting to the set
temperature. The microcontroller is
capable of adjusting automatically
to the different heating capacities of
various vessels and their contents. As
a result, the heat is distributed in an
optimum fashion with no temperature
drift or ripples.
Regulation of the temperature of the medium using PT 100
temperature sensor

28
Temperature sensor
Calibration:
In order to use tolerances to limit temperature deviations, the
user can calibrate the temperature sensor in conjunction with the
device.
2-point calibration:
Calibration using two temperatures
3-point calibration:
Most accurate way of calibrating the temperature sensor at three
different temperatures
Note:
A calibration carried out by the user is indicated on the display with
the symbol (11) shown in red. The calibration of the PT100 and
PT1000.50 double sensor are carried out separately.
Reset calibration:
The menu allows the user to reset the calibration for the
temperature sensor.
Measurement
The weighing module is a function which allows the user to
perform simple weighing tasks.
To start the weighing process, press the (G) button on the front
membrane or alternatively select “Weighing“ from the menu. Press
the rotary knob (D) to start the weighing function.
Note:
The heating and stirring functions must be deactivated.
It may take several moments for the system to stabilise.
Once the system is stable, a “g” will be shown alongside the
measured value.
Calibration
Place the calibration weight on the mounting plate and wait
until the device indicates that the calibration process has been
completed.
This process needs to be repeated two or three times before clo-
sing calibration mode.
Once the calibration process has been completed successfully, the
weighing module is ready for use.
Regularly re-calibrate the device.
Weighing
Set
The Timer function allows the user to stop the heating process
after a certain time has lapsed. The Timer function can be set for
up to 99 hours, 59 minutes and 59 seconds.
Note:
The time starts to count down when starting both functions
(heating and/or stirring).
Once the heating function is activated, the timer function only
refers to heating. The stirring function continues to operate as
previously, thereby avoiding a delay in boiling in the liquid. The
motor is only switched off when the heating function is not active.
The stirring function is stopped if the heating function is not started
during the timer cycle and the time runs out.
Timer
Calibration
The device has an integrated pH measuring feature for determining
the pH of different liquids.
The pH sensor must be calibrated before being used to attempt a
pH measurement.
The calibration is used to adjust the pH probe and the device
so that they work together correctly. As part of the process,
the neutral and pH gradient are specified for the measurement
chain. To complete the calibration, use pH4, pH5 and pH7 buffer
solutions in accordance with DIN 19266.
Note:
a pH calibration can only be carried out with an inserted
temperature sensor.
• Scroll down to the “pH probe” icon in the menu
• Open the submenu by pressing the rotary knob (D)
• Open the “Calibration” submenu and confirm by pressing the
rotary knob (D)
• Place the pH probe and temperature sensor in the required buffer
solution.
• Once the value is stable, confirm it by pressing the rotary knob
(D).
• Follow the instructions on the display and place the pH probe
and temperature sensor in the next buffer solution.
• Confirm once more the value displayed.
• In the case of a 3-point calibration, a third buffer solution must
be used.
pH measurements can be carried out once the calibration has
been completed successfully.
Note:
The use of the temperature sensor is limited by the maximum per-
missible temperature.
Ensure that the temperature of the liquid does not exceed the
maximum permissible temperature.
Display
The menu allows the user to specify that the “ pH probe ” is shown
on the display. A tick shows that the option is activated.
pH probe
Note:
By entering a value of 00:00:00 (hh:mm:ss), the counter is
activated. The counter shows the time elapsed during the current
experiment.
Display
The menu allows the user to specify that the “Timer” is shown on
the display. A tick shows that the option is activated.
The set mode is shown permanently on the display (10).
Mode A
All the settings are retained when the device is switched off or
disconnected from the mains. When the device is switched on, the
status of the stirring and heating functions is set to (OFF).
Mode B
All the settings are retained when the device is switched off or
disconnected from the mains. When the device is switched on, the
status of the stirring and heating functions is set to whatever it was
before the device was last switched off (ON or OFF).
Mode

29
In this menu the user can specify what information(Torque trend
measurement, pH value, Timer or Graph) will be displayed on the
main screen.
A tick shows that the option is activated.
Axis Assignment
In this menu the user can select 2 options from the 4 options
(Temperature, Speed, Torque or pH) for axis assignment.
A tick
shows that the option is activated.
Axis Scaling
For axis scaling, the user can choose either the automatic method
or the manual method.
Under menu “Programs”, 5 user-defined speed (rpm)-time pro-
files can be created. In addition, the user could define the intermit-
tent mode is activated or not in the programs.
If the intermittent mode is activated, the run time/stop time value
from “Intermittent Mode” setting will be taken.
Note: If user need to activate the intermittent mode in one segment
of a program, he should set the “Run time/Stop time” in menu
option “Interval”, meanwhile activate the “Run/Stop” function in
menu option “Intermittent Mode” (see section “Stirring”).
Once a program has been selected, the following options are avail-
able:
Start: Start the selected program upon request.
When the selected program is started by pressing on menu option
“Start” with
rotary/push knob, the screen allows the user to choose
“Infinite loop“ or “Loop count“. Press “OK” with
rotary/push knob
to confirm “Infinite loop“ and start the program control, or input
numbers and then press “OK” with
rotary/push knob to confirm
“Loop count“ and start the program control.
Edit: Edit the selected program parameters.
Start to edit the selected program parameters by pressing on menu
option “Edit” with rotary/push knob. The user can edit, delete, in-
sert or save one selected program segment in the program.
When user edits the program time for at least one segment, a tick
(
√ ) for respective program will appear.
Delete: Delete the selected program.
If a selected program is deleted by pressing on menu option “Delete”
with rotary/push knob, all the program parameters will be emptied.
The tick (√) disappears.
View: Show details of the selected program.
Display
Graph
Programs
Time out
The “Time out” function is used to define how long an interruption
in communications between the magnetic stirrer and the wireless
controller box can be before there is a reaction in the magnetic
stirrer.
If the set time limit is exceeded, the pre-selected temperature and
speed values become active.
Note: The initial setting for the time limit is 30 seconds. The user
can set a value of up to 60 minutes for this time limit.
In the “Speed“ option, the user can specify a speed that is
appropriate and safe for the stirring task. The safe speed applies
if there is a communication failure between the stirrer and the
Wireless Controller or the communication range is exceeded.
Note: The initial setting of the safe speed is 50 rpm, and is
implemented after expiry of the time limit. The user can set a value
of up to 1700 rpm for this speed limit.
If the intermittent mode is activated, the device immediately
switches to run at the set safe speed, or the set speed if that is less
than the safe speed.
In the “Temperature“ option, the user can specify a temperature
that is appropriate and safe for the heating task.
The safe tem-
perature applies if there is a communication failure between the
stirrer and the Wireless Controller or the communication range is
exceeded.
Note: The setting range for the safe temperature is 0 - 340 °C.
Password
In the “Password“ menu, the user can protect the Wireless Controller
settings using a password (factory setting: 000).
Safe temp confirmation
This option requires the user to accept the hot plate safe temperature
value during the start-up.
Safety
Mode C
In this mode, the device can be used either with or without a
temperature sensor.
When the device is switched on using the main switch, the stirring
and heating functions are started in the last set status and at the
last set values. The set nominal values in operating modes A and B
cannot be modified.
This function will only be active if:
- Sensor temperature is < 50 °C
- Difference target temperature / sensor temperature > 5 K
Er5
The time is taken to recognise that the sensor has not been placed
in the medium when the heating is switched on.
Note: The user can set a value from 1 to 30 min for this time limit
depending on the application.
If time limit is set to 0 min, the Error 5 detection is disabled.
CAUTION

30
Languages:
The “Languages“ option allows the user to select the desired lan-
guage by turning and pressing the rotary/push knob (D). A tick
indicates the language that is set for the system.
Units:
The ”Units“ option allows the user to select the desired unit for
displaying the temperature. The choice is between ”°C” or ”°F”
and is made by turning and pressing the rotary/push knob (D). A
tick indicates the unit that is set for the system.
Display:
The ”Display“ option allows the user to change the background
color between ”Black“ and ”White“, and display ”Firmware Update
Information“. A tick shows that the option is activated.
Sound:
The ”Sound” option allows the user to activate/deactivate the key
tone. A tick shows that the option is activated.
Factory Settings:
Select the ”Factory Settings” option by turning and pressing the
rotary/push knob. The system requests confirmation to restore the
factory settings. Pressing the ”OK” button resets all the system
settings to the original standard values set at dispatch from the
factory (see “Menu structure“).
Communication:
Bluetooth
The ”Bluetooth” option allows the user to activate/deactivate the
”Bluetooth” function. A tick shows that the option is activated.
Settings
The device allows the user to establish a connection to a wireless
controller box.
The device can then be operated via a wireless controller box
within a range of 10m (without obstructions).
Please refer to the separate instruction manual for the wireless
controller box for more details.
Eurostar control
The new safety feature of the RET monitors the behavior of a
connected Eurostar and stops the heating process when the
Eurostar stirring speed falls below a specific minimum speed. The
RET also stops the heating process whenever the Eurostar is in
an error state or the cable connection between the RET and the
Eurostar gets lost.
The Eurostar can be connected with the RET control either via
RS232 or USB. The used interface has to be selected in the menu.
Main Menu ÆSettings ÆCommunication ÆEurostar control
Important information when the USB interface is used for the
communication between the RET and the Eurostar:
The USB cable has always be connected with the RET first and then
with the Eurostar.
For the stirrer speed of the Eurostar has to be a minimum speed
set. When the actual value of the stirrer speed falls below the
minimum limit the heating function of the RET will be stopped and
the RET will be set in an error state.
The new menus are only in English.
Information:
The ”Information” option offers the user an overview of the most
important system settings of the stirrer RET control-visc.
Connections and interfaces
Micro-USB
Bluetooth
Power supply connection PT 100 / PT 1000 plug
RS 232
BNC connector (only for pH probe)
Pt1000-2
5
31
4
2
Pt1000-1
Pt100
5
31
4
2
9-pin connector

31
Serial RS 232 interface and USB
USB interface
The Universal Serial Bus (USB) is a serial bus for connecting the
device to the PC. Equipped with USB devices can be connected to
a PC during operation (hot plugging). Connected devices and their
properties are automatically recognized. Use the USB interface in
conjunction with labworldsoft®for operation in “Remote” mode
and also to update the firmware.
Installation
First, download the latest driver for IKA®devices with USB in-
terface from http://www.ika.com/ika/lws/download/usb-driver.
zip and install the driver by running the setup file. Then connect
the IKA®device through the USB data cable to the PC. The data
communication is via a virtual COM port. Configuration, command
syntax and commands of the virtual COM ports are as described in
RS 232 interface.
Configuration
The RS 232 serial interface can be used to operate the device using
a computer and a suitable user program (labworldsoft).
In order to increase safety when operating the RET using a
PC, a watchdog function can be activated which monitors
the continuous data flow (see section entitled: “Watchdog
function”).
• The functions of the interface circuit between the laboratory
device and the automation system are a selection from the
signals specified in the EIA standard RS232 as per DIN 66020
Part 1. The assignment of the different signals can be seen in
the image.
• Standard RS 232, corresponding to DIN 66259 Part 1 is valid
for the electronic characteristics of the interface circuits and
assignment of signal states.
• Transmission process: asynchronous character transmission in
start-stop operation.
• Transmission type: full duplex
• Character format: character composition according to data
format in DIN 66022 for start-stop operation. 1 start bit,
7character bits, 1 parity bit (even), 1 stop bit.
• Transmission speed: 9,600bit/s
• Data flow control: hardware handshake RTS/CTS
RTS: (PIN 7) LOW (positive voltage)
/ COMPUTER can transmit
RTS: (PIN 7) HIGH (negative voltage)
/ COMPUTER cannot transmit
CTS: (PIN 8) LOW (positive voltage)
/ COMPUTER ready-to-receive
CTS: (PIN 8) HIGH (negative voltage)
/ COMPUTER not ready-to-receive
• Access method: data transmission from the device to the
computer only occurs after a request from the computer.
Command syntax
The following points should be noted for the instruction set:
• Commands are generally sent from the computer (master) to
the lab device (slave).
• The lab device only responds to requests from the computer.
• Commands and parameters, as well as consecutive parameters,
must be separated by at least o n e space (code: hex 0x20).
• Each individual command including parameters and data and
all responses are completed with CR LF (code: hex 0x0D and
0x0A) and can have a maximum length of 10 characters.
• The dot is used for decimal separators in a floating-point value
(code: hex 0x2E).
The details given above generally comply with the recommendations
of NAMUR (NAMUR recommendations for the design of electrical
plug-in connectors for analogue and digital signals in laboratory
MSR devices. Rev. 1.1).
Summary of available NAMUR commands
Abbreviations used:
X,y= numbering parameter (integer)
m = variable value, integer
n = variable value, floating-point number
X = 1 medium temperature(external temperature sensor)
X = 2 hot plate temperature
X = 3 hot plate safety temperature
X = 4 speed
X = 5 viscosity trend
X = 7 heat transfer medium temperature
X = 80 pH value
X = 90 Weight value
X = 54 Error 5 response time in seconds (180 <= n <= 1200)
X = 55 Intermittent mode cycle time in seconds
( 10 <= n <= 600 )
X = 56 Intermittent mode, duration of interruption in seconds
( 5 <= n <= 60 )
NAMUR commands Function Display
(additional)
IN_NAME Title request
IN_PV_X X=1;2;3;4;5;7;80;90 Current value reading
IN_SOFTWARE Software ID number, date, version request
IN_SP_X X=1;2;3;4;7;8;12;
42;54;55;56;
Set target value reading
IN_TYPE Lab device identification request
OUT_NAME name Output of identification name. (Max. 6 characters; default: IKARET)
OUT_SP_12@n Setting WD safety limit temperature with set value echo
OUT_SP_42@n Setting WD safety limit speed with set value echo
OUT_SP_X n X=1;2;4;7;
54;55;56
Setting of target value to n

32
“Watchdog” functions; monitoring of the serial data flow
If, once this function has been activated (see NAMUR commands),
there is no retransmission of the command from the computer
within the set time (“watchdog time”), the heating and stirring
functions are switched off in accordance with the set “watchdog”
function or are changed to the set target values.
The data transmission may be interrupted by, for example, a crash
in the operating system, a power failure in the PC or an issue with
the connection table between the computer and RET control-visc.
“Watchdog” - mode 1
If there is an interruption in data communications (longer than the
set watchdog time), the heating and stirring functions are switched
off and ER2 is displayed.
“Watchdog” - mode 2
If there is an interruption in data communications (longer than the
set watchdog time), the speed target value is changed to the WD
safety speed limit and the temperature target value is changed
to the WD safety temperature limit value. The warning WD is
displayed.
Connection possibilities between the RET control-visc and
external devices
The following adapters and adapter cables are available from IKA®
for connecting the RET control-visc to external devices.
PC 1.1 cable
The PC 1.1 cable is used to connect the 9-pin plug to a computer.
Accessories
• Magnetic stirring bar:
ø 6mm; max. length 15 mm
ø 7mm; max. length 60 mm
ø 10mm; max. length 80 mm
• RS 1 Set of magnetic stirring bars
• RSE Stirring bar remover
• H 1000 Beaker 1l
• H 1500 Beaker 1.5l
• H 3000 Beaker 3l
• H 5000 Beaker 5l
• H 8000 Beaker 8l
• H 135.3 Flask carrier
• H 135.310 Quarter 20ml reaction vessel
• H 135.311 Quarter 30ml reaction vessel
• H 135.312 Quarter 40ml reaction vessel
• H 135.313 Quarter 4ml reaction vessel
• H 135.314 Quarter 8ml reaction vessel
• H 135.315 Quarter 16ml reaction vessel
• H 135.4 Reaction block for 100ml round flask
• H 135.410 Insert for 10ml round flask
• H 135.411 Insert for 25ml round flask
• H 135.412 Insert for 50ml round flask
• H 135.5 Reaction block for 500ml round flask
• H 135.510 Insert for 200ml round flask
• H 135.511 Insert for 250ml round flask
• H 135.512 Insert for 300ml round flask
• H 135.6 Reaction block for 1,000ml round flask
• H 135.610 Insert for 500ml round flask
• H 16 V Support rod
• H 16.3 Extension
• H 38 Holding rod
• H 44 Cross sleeve
• PT 100.50 Temperature sensor
• PT 100.51 Temperature sensor, glass coated
• PT 1000.50 Double temperature sensor
• PT 1000.51 Double temperature sensor, glass coated
• RET control-visc WiCo
for further accessories see www.ika.com.
1
RxD 2
TxD 3
4
GND 5
6
RTS 7
CTS 8
9
PC
1
2
3
4
5
6
7
8
9
1
2 RxD
3 TxD
4
5 GND
6
7 RTS
8 CTS
9
5
4
3
2
1
9
8
7
6
OUT_WD1@m Watchdog mode 1: if event WD1 should occur, the heating and stirring functions are
switched off and ER2 is displayed. Set watchdog time to m (20- 1,500) seconds, with
watchdog time echo. This command launches the watchdog function and must be
transmitted within the set watchdog time.
OUT_WD2@m Watchdog mode 2: if event WD2 should occur, the speed target value is changed to the
WD safety speed limit and the temperature target value is changed to the WD safety
temperature limit value. The warning WD is displayed. The WD2 event can be reset
with OUT_WD2@0 - this also stops the watchdog function. Set watchdog time to m
(20- 1,500) seconds, with watchdog time echo. This command launches the watchdog
function and must be transmitted within the set watchdog time.
RESET Switches off the device function.
START_X X=1;2;4;5;7
X=80; 90
Switching on of device - (remote) function
Activation of the previous watchdog function. If no target value is entered within
60seconds, the (old function) heating is switched off.
Remote
STOP_X X=1;2;4;5;7
X=80; 90
Switching off of device - (remote) function The variables set with OUT_SP_X remain
saved. Includes command RMP_STOP.
Remote

33
Error messages and troubleshooting table
Fault Description Causes Effect Solutions
Er 2 In remote operation (PC)
mode with activated
watchdog function in
mode 1: no communica-
tion between PC and RET
control-visc
• PC does not transmit any data
within the set watchdog time
• Connection to PC interrupted
Heating switched off
Motor switched off
• Change watchdog time
• Transmit data from PC within set
watchdog time (OUT_WDx@m)
• Check cable and plug
Er 3 Device internal tempera-
ture exceeds 80 °C
• Heat accumulation between
heating plate and housing
• Permitted ambient temperature
exceeded
Heating switched off • Switch device off, leave to cool and
switch on again
• Change experiment
• Observe maximum permissible am-
bient temperature
Er 4 Difference between target
and actual speed exceeds
300rpm
• Motor blocked or overloaded Heating switched off
Motor switched off
• Reduce load torque or use smaller
magnetic rods
• Reduce target speed
Er 5 No temperature increase
in sensor at continuous
temperature difference
(selected time in menu)
• Sensor not in medium
• Volume of medium to be mea-
sured too large
• Heat conductivity of medium to
be measured too low
• Heat conductivity of the vessel is
too low
• In the case of indirect heating,
the overall heat conductivity re-
sistance is too large
Heating switched off • Place the sensor in the medium
• Reduce the volume of the media
• Use a carrier fluid with better heat
conductivity properties
• Replace the glass vessel with a
metal pot
• Increase the “Time-out” period
Er 6 Interruption in safety cir-
cuit
• Defective connection cable Heating switched off • Replace cable
Er 13 SAFE TEMP P adjustable
safety circuit defective
• Target/current different of the
adjustable safety circuit for mini-
mum temperature monitoring
Heating switched off • After switching on, change the
SAFE TEMP to a different value; if
this solves the issue, the previous
value can be reset by switching the
device off and on again
Er 14 Short circuit in temperatu-
re sensor 1
• Short circuit in temperature sen-
sor plug
• Short circuit in the cable or tem-
perature sensor
Heating switched off • Check the plug
• Replace the temperature sensor
Er 21 Fault during heating plate
safety test
• Safety relay does not open Heating switched off • Switch device off, leave to cool and
switch on again
Er 22 Fault during heating plate
safety test
• S_CHECK cannot generate
H_S_TEMP
Heating switched off • Switch device off, leave to cool and
switch on again
Er 24 The temperature of the
heating plate exceeds
SAFE TEMP H (Hotplate)
• SAFE TEMP H (Probe) has been
set to lower than the current tem-
perature of the heating plate
• Disconnection of heating plate
control temperature sensor
Heating switched off • Leave the heating plate to cool
• Set the SAFE TEMP H (Hotplate)
higher
Troubleshooting
The device will indicate that there is a fault by displaying an error
message “Er X” (see table) on the screen.
Heating will be switched off permanently (exception: WD - see
table).
The stirring function continues to operate at the pre-set speed if
there is a fault in the heating circuit (exception: WD - see table).
In order to reset the device after a fault, it may need to be discon-
nected from the power supply for several seconds. The period the
device is switched off may also need to be longer if the tempera-
tures need to be counterbalanced (residual heat display may no
longer be active; see “Residual heat display”).
The safety circuit test takes place within 20 seconds of switching
on the device; after the test, the other monitoring functions are
activated.
If a fault cannot be eliminated directly, you must perform a
RESET (see “Settings” menu). If the faults still cannot be elimi-
nated, the appliance must be inspected by a technical service
technician.

34
Maintenance and cleaning
The device should operate without the need for maintenance,
however it is subject to natural wear and tear on parts and their
statistical failure rate.
Cleaning
Remove the device from the mains
before cleaning.
Only use cleaning materials recommended by IKA®.
Dirt Cleaning agent
Dyes Isopropyl alcohol
Building materials Water containing detergent/isopropyl alcohol
Cosmetics Water containing detergent/isopropyl alcohol
Food Water containing detergent
Fuels Water containing detergent
- Ensure no liquid enters the device during cleaning.
- Wear protective gloves when cleaning the device.
- Please consult with IKA®before using any cleaning or decon-
tamination methods not specifically recommended.
Ordering spare parts
When ordering spare parts, please make sure to indicate the fol-
lowing:
- device type
- device manufacturing number; see rating plate
- software version (second value displayed when switching on the
device)
- position number and description of spare part; see www.ika.
com.
Repairs
Please only send devices in for repair that have been
cleaned and are free of materials which might present
health hazards.
For this, use the “certificate of compliance” form which you can
obtain from IKA®or can download a version for printing from the
IKA®website at www.ika.com.
If your appliance requires repair, return it in its original packaging.
Storage packaging is not sucient when sending the device - also
use appropriate transport packaging.
Fault Description Causes Effect Solutions
Er 25 Heating switching ele-
ment monitoring
• Heater control circuit switch (TRI-
AC) short-circuited
• Safety relay has interrupted the
heating circuit
• Heater or the supply line is dis-
connected
• Interruption in heating plate safe-
ty temperature sensor
Heating switched off • Switch device off, leave to cool and
switch on again
Er 26 Difference between inter-
nal heating plate control
and safety temperature
sensor too large
• Irregular temperature distribution
across heating plate due to spo-
radic heat dissipation
• Defective control or safety tem-
perature sensor
Heating switched off • Switch device off, leave to cool and
switch on again
• Ensure regular heat dissipation
when using metal blocks, etc. on
the flat surface of the heating plate
Er 31 Defective monitoring of
the heating control circuit
(TRIAC)
Heating switched off • Contact customer service
Er 41 Bar decoupling • The bar has broken away four
times in a row without an explicit
change in the target value
Target speed reduced
by at least 300rpm
Heating switched off
• Select a lower target speed
• Select a smaller stirring bar
Technical data
Rated voltage
or
or
VAC
VAC
VAC
220...230 ± 10%
115 ± 10%
100 ± 10%
Frequency Hz 50 / 60
Power input W 650
Display TFT
Timer h 99 h 59 min 59 sec
Stirring
Motor: ball bearing mounted, brushless EC motor

35
Number of stirring positions 1
Max. motor power consumption W 22
Max. motor output W 12
Speed range rpm 0; 50 to 1700
Target speed setting resolution rpm 1
Actual speed display resolution rpm 1
Speed variation (without load, 115/230 V, at 1700 rpm, RT 25 °C) % 2
Stirring capacity (H2O) l 20
Heating
Self-heating of the hotplate (RT:22 °C/duration:1 h) °C 35
Heating plate material Stainless steel 1.4301
Heating plate diameter mm 135
Heat output (100/115/230 V) W 600 ± 5%
Heating rate (1 l H2O in H15) K/min 7
Temperature range °C RT ... 340
Temperature medium max. (dep. on vessel) °C 265
Target temperature setting resolution K 0.1
Actual temperature display resolution
- of the medium temperature
- of the carrier fluid temperature
K
K
0.1
1
Adjustable heating plate safety circuit °C 50 - 380 ( ± 5 °C)
Safety circuit setting resolution K 1
Temperature sensor in medium PT 100 or 2x PT 1000, DIN EN 60751 Class A
Temperature sensor deviation
(PT 100 or 2x PT 1000, DIN EN 60751 Class A)
K <= ± [0.15 + 0.002 °(T)]
Deviation in section of temperature measurements K
K
<= ± 0.3 < 100 °C
<= ± 0.5 > 100 °C
Deviation in section of temperature measurements + sensor K
K
<= ± 0.45 at 0 °C
<= ± 0.85 at 100 °C
Deviation in heating plate temperature K ± 3 without vessel; heating plate at 100 °C
Control hysteresis with temperature sensor
(500 ml water, 600 ml glass beaker, 30mm bar, 800 rpm, PT 100.70, 50 °C)
K ± 0.2
Heating plate control hysteresis K ± 3 without vessel; heating plate at 100 °C
Permissible ambient temperature °C + 5 to + 40
Permissible relative humidity % 80
Permissible operating time % 100
Protection class according to DIN EN 60529 IP 42
Weighing range g 10 - 5000
Load capacity weighing function max. g 5000
Weighing accuracy g ± (0.3%+2)
Level of contamination 2
Overvoltage category II
Protection class 1 (protective earth)
Use above sea level m max. 2000
Dimensions (W x D x H) mm 160 x 270 x 85
Weight kg 2.7
Subject to technical changes