Speed – overload operation, Output shaft, Speed display – IKA EUROSTAR 20 high speed control User Manual

Page 6: Commissioning, Drive, Motor protection, Speed – normal operation

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Accessories must be assembled according to the following assembly
instructions (Fig. 2 to Fig. 7).

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

Speed – overload operation

In order to overcome peaks in the load such as arise when a solid
or viscous medium is added, the stirrer can be run for a brief pe-
riod at twice its rated power. When running in the overload range
(for instance if the viscosity has increased at a particular stage of the
process) the speed will be reduced to a degree sufficient to keep the
torque on the stirrer shaft within the rated torque of the device.
The speed is continually adjusted whilst the stirrer is running to cor-
respond to the operating conditions and so that it matches the set
speed as closely as possible.

Overload status 1:
The device is already running within the overload range, whereby
the actual speed does not match the set speed. This condition is
maintained as long as neither the motor current nor the temperature
exceeds their permissible limit value. This is indicated by the torque
value flashing in the display.
Once the load reduces to a value within the normal range again, the
torque value ceases to flash.

Overload status 2:
If the device is subjected to a fluctuating load which causes the
torque to be more than double the normal torque, the actual speed
of the stirrer shaft is quickly reduced to zero.
Message in the display: Error 4 (see “Error codes” section).

Output shaft

The output shaft has cone seat specially for precision shaft. Stirring elements can be screw-connected on the precision shaft (see Fig. 4).

Please see section “Safety instructions“!


Speed display

The speed is set using the rotary knob (B, see Fig.1) on the front of the Wireless Controller (WiCo).
The speed is displayed directly in revolutions per minute (rpm) in the display (C, see Fig.1) of the WiCo.


Assemble the overhead stirrer and all necessary accessories on a sta-
ble, even, non-slip surface. The EUROSTAR overhead stirrer must be
secured to a stable stand (e.g. R 2722 or R 2723) with a cross-sleeve
(e.g. R 270). 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.


The rotary knob (B, see Fig. 1) of the Wireless Controller (WiCo) allows the speed of the stirrer to be adjusted over the entire speed range.

OS 1.0 power supply unit (for Wireless Controller (WiCo))


USA, China


Europe, Switzerland

Motor protection

The stirring instrument is suitable for continuous operation. The motor
current is limited electronically. The instrument has an anti-stall and
anti-overload system.

If a fault occurs, a safety circuit immediately switches off the motor
permanently through a relay in the power board. A fault occurs if the
safe functioning of the instrument is compromised.

Speed – normal operation

Speed - regulated (no variation in speed)
The speed is monitored and regulated by processor controlled. The tar-
get speed is constantly compared with the actual rotation speed value
of the output shaft and variations corrected. This guarantees a constant
speed even if the viscosity of the substance being stirred changes.

Fluctuations in mains voltage within the permitted tolerance range
have no effect on the quality of regulation and constancy of speed.
The speed is set using the front knob (B, see Fig. 1). During normal
operations the speed value on the display (C, see Fig. 1) corresponds
to the speed of the output shaft in revolutions per minute (rpm).