Laboratory centrifuge Sigma 1-7
6 Using the centrifuge
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Version 08/2018, Rev. 1.7 of 28/04/2022
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Translation of the original operating manual, part no. 0703402
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6.2.2
Installation of rotors and accessories
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6.2.2.1
Installation of a rotor
• Open the centrifuge lid by pressing the lid key.
• Loosen the rotor tie-down screw by turning it anti-clockwise, but do not
remove it.
• Lower the rotor with its central bore straight down onto the motor shaft.
• Tighten the rotor tie-down screw clockwise with the supplied rotor
wrench with 3 Nm. In doing so, hold the rotor at its outer rim.
• Follow the safety instructions and hazard warnings (see chapter 3 -
WARNING
Once a day or after 20 cycles, the rotor tie-down screw must be loosened
by some turns, and the rotor must be lifted and fastened again. This
ensures a proper connection between the rotor and the motor shaft.
NOTE
Rotors can be used without a cover. This leads, however, to higher levels
of noise and temperatures when running.
Removal of a rotor
• Loosen the rotor tie-down screw by turning it anti-clockwise and remove
the rotor.
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