Output shaft, Speed display, Commissioning – IKA EUROSTAR 200 digital User Manual

Page 7: Speed – overload operation

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Output shaft

The clamping chuck and output shaft permit clamp-
ing IKA


recommend stirrer tools (see “Permitted



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 open the stirrer cover, it is possible for stirring
shafts to push out over the top edge of the housing
at standstill, e.g. during change container.

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

Please see section “Safety


The rotation speed is adjusted with the rotary knob
(B, see Fig. 1) on the front of the overhead stirrer.

Speed display

The rotational speed is displayed directly in revolutions
per minute (rpm) on the LED display (C, see Fig. 1).


Assemble the overhead stirrer and all necessary
accessories on a stable, even, non-slip surface.
The EUROSTAR 200 digital 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 stir-

ring 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.


Speed – overload operation

The stirrer can deliver double output for a short
time to even out load peaks which could occurs,
for instance, if solid or semi-pourable agents are
added. If the operation is in the overload range (e.g.
process-related increase in viscosity), the actual speed
is reduced until the stirrer torque corresponds to
the nominal torque of the machine, and the
target speed blinks. The possible speed is continually
adapted to operating conditions, guaranteeing that
speed is as close as possible to the target speed set.
To protect the machine from overloading, the
speed is reduced if the machine has been operated
in overload mode. The target speed set then does
not correspond to the actual speed of the output
shaft. This condition is indicated by blinking of the
target speed (overload operation).

Overload status 1:

The machine is already running in the overload
range, the target speed does not yet correspond
to the actual speed. This condition is maintained
as long as neither the motor current nor the tem-
perature exceeds the permitted limit values.
Display symbol: blinking of the target speed.

When the load goes back to the normal range,
the target speed stop blinking and correspond to
the actual speed.

Overload status 2:

When the machine meet a fluctuating load
which is over double of the nominal torque, the
actual speed of the stirrer shaft will go down
quickly to stop.
Display symbol: Er 4 (see section “Error codes“).

Accessories must be assembled according to the
following assembly instructions (Fig. 2 to Fig. 6).

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