Description Of The Centrifuge; Overview; Construction And Constructive Safety Measures; Drive - Sartorius Stedim Biotech CENTRISART A-14 Betriebsanleitung

3. Description of the Centrifuge

3.1 Overview

3.2 Construction and
Constructive Safety Measures

3.3 Drive

3.4 Operation and Display

3.5 Electronics

3.6 Safety Devices

3.6.1 Lid Lock, Cover Closing
Device
3. Description of the Centrifuge
The new generation of Sartorius Stedim Biotech GmbH laboratory centrifuges is
equipped with newest state-of-the-art electronics and is driven by brushless, silent
and long-life asynchronous motors.
The lack of carbon brushes makes changing them obsolete and avoids carbon dust.
Thus operation in clean rooms is possible provided that appropriate accessories are
used.
The centrifuge is built into a solid diecast housing. The centrifuge lid is also made
of solid diecast. From the back, the lid is secured by a solid hinge and at the front by
the motorized cover lock. These elements form a solid safety case around the rotor
chamber.
The drive motor is an asynchronous motor.
The foil keypad includes the hermetically sealed graphical LCD display.
The keys of the keypad have a distinct pressure point.
Operating states are clearly indicated.
The microprocessor-controlled electronics allows extensive adaptations of the centri-
fuge to different tasks. The following parameters can be set:
– Speed in steps of 100 rpm
– RCF in steps of 100 + g
– Time (99 min, 59 sec) in steps of 1 sec
– Short-time operation
– Continuous operation
– Soft start | soft stop
Apart from the passive safety devices ensured by the instrument's mechanical design
there are the following active precautions for your safety:
The centrifuge can only be started when the power switch has been switched to "ON"
and the lid has been correctly closed. After closing the lid the motorized lid lock is
automatically locked. The lid opens automatically after the centrifuge run, once the
rotor has come to a halt. In the event of a power supply failure, the lid can be opened
via the emergency lid release.
Attention:
The lid must not be released and opened unless the rotor is at standstill
(see 10.3.3 Emergency Lid Release).
Description of the Centrifuge 13