IKA MICROSTAR 1 CONTROL Manual page 10

Power supply unit (with exchangeable adapters)
Schematics of device and power supply.
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Europe UK
(E) (B)
US China
(N) (C)
Australia
(A)
Useful information
/// Stirrer
The stirring device is suitable for continuous operation. The motor current is
limited electronically. The device has an anti-stall and anti-overload system.
If a fault occurs, a safety circuit immediately switches off the motor
permanently. The device starts with the last settings made. If the device
vibrates too much, an error message appears on the display and an acoustic
signal sound (see chapter "Error codes").
Speed
/// Speed – normal operation
Speed - regulated (no variation in speed):
The speed is monitored and regulated by processor controlled. The target
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. During normal operations
the speed value on the display corresponds to the speed of the
output shaft in revolutions per minute (rpm).
/// Speed – overload operation
When solid or semi-viscous substances are added, the stirrer can be run for
a brief period at 130% 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 reduce to a degree sufficient to keep the torque on the stirrer
shaft within the rated torque of the device.
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