Labnet Z206A High Capacity, Compact Research Centrifuge - Manual (Page 22)

Page 22 of 24 INSTRUCTION MANUAL Z 206 A © HERMLE Labortechnik GmbH
3 MAINTENANCE
3.1.2 Glass breakage
With high g-values, the rate of glass tube breakage increases. Glass splinters have to be removed
immediately from rotor, buckets, adapters and the rotor chamber itself. Fine glass splinters will scratch
and therefore damage the protective surface coating of a rotor.
If glass splinters remain in the rotor chamber, fine metal dust will build up due to air circulation. This
very fine, black metal dust will extremely pollute the rotor chamber, the rotor, the buckets and the
samples.
ATTENTION:
Please check the relevant specifications of the tubes centrifuged with the tube manufacturer.
3.1.3 Disinfection of aluminum-rotors
In case of infectious material spilling into the centrifuge, the rotor and rotor chamber have to be
disinfected right after the run. Rotors may be autoclaved at a maximum temperature of 121°C.
The rotor and rotor chamber should be cleaned with a universal, neutral disinfection agent, e.g. on
formalin base. A disinfection spray is most suitable in order to easily reach all difficult to access spots.
ATTENTION:
Before applying any other cleaning or decontamination method other than recommended by the
manufacturer, contact the manufacturer to ensure that it will not damage the unit or
the rotor.
3.1.4 Disinfection of PP-rotors
Autoclaving
The recommended time for autoclaving: 15 – 20 min at 121°C (1 bar)
ATTENTION: The sterilization time of 20 min. must not be exceeded. Sterilization again and again
will cause reduction of the mechanical resistance of the plastic material.
Before the autoclaving the PP-rotor and adapter must thoroughly be cleaned to avoid the burning in of
dirty residues.
You can disregard the consequences of some chemical residues to plastic materials at ambient
temperatures. But at the high temperatures of the autoclaving those residues may corrode and destroy
the plastic. The objects must be thoroughly washed up with distilled water after the cleaning but before
the autoclaving. Residues of any cleaning liquids may cause fissures, whitening and stains.
Gassterilization
Boxes, bottles and rotors may be gassterilized with Ethylenoxyd. According to the duration of the
application you may give long enough an airing to the items after the sterilization and before using them
again.
ATTENTION: Because the temperature may rise during the sterilization, rotors, boxes and bottles
must not be closed respectively must be totally unscrewed.
Chemical sterilization
Bottles, boxes and rotors may be treated with the usual liquid disinfectants.