Operating Manual SIGMA 2-5, page 22 of 55
03/06
2.1 General Outlay
The new generation of SIGMA laboratory centrifuges is equipped with newest
state-of-the-art electronics and is driven by brushless, silent and long-life asyn-
chronous motors.
The problem of carbon brush change is no longer existent and as there is no
carbon dust pollution, operation in clean rooms is possible if the appropriate
accessories are used.
2.2 Construction and Constructive Safety Measures
The centrifuge is built into a solid steel housing. The centrifuge lid is also made of
solid steel. From the back, the lid is secured by solid hinges and at the front by
two separate cover locks.
2.3 Drive
The drive motor is a well dimensioned asynchronous motor.
2.4 Operation and Display
The grafical LCD display is hermetically sealed, operation is executed via two
knobs. Any operating status is indicated.
2.5 Electronics
The electronics controlled by a microprocessor allows extensive adaptations of
the centrifuge to the different tasks. The following parameters can be set:
− Speed in steps of 100 rpm
− RCF in steps of 250 x g
− Time in steps of 1 min (max. 30 min)
− Continuous operation
− Short-time operation
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