Cleaning And Disinfection Of The Unit; Cleaning And Disinfection Of The Rotor; Disinfection Of Pp-Rotors - Hermle Z 207 A Operating Manual

3.1.2 Cleaning and Disinfection of the Unit

1. Open the lid, before turning off the unit. Disconnect from the power supply.
2. Open the rotor nut, by turning the rotor key counter-clockwise.
3. Remove the rotor.
4. For cleaning and disinfection of the unit and the rotor chamber, use the above mentioned
cleaner.
5. Clean all accessible areas of the device and its accessories, including the power cord, with a
damp cloth.
6. Wash the rubber seals and rotor chamber thoroughly, with water.
7. Rub the dry rubber seals with glycerol or talc, to prevent these from becoming brittle. Other
components of the unit, e.g. the lid lock, motor shaft and rotor, should not be greased.
8. Dry the motor shaft with a soft, dry and lint-free cloth.
9. Examine the unit and accessories for damage.
Remove adherent dust, at least every 6 months, from the ventilation slots in the centrifuge, by using
a soft brush.
*Before doing so, please switch off the unit and disconnect from the power supply.

3.1.3 Cleaning and Disinfection of the Rotor

1. Clean and disinfect: the rotors and adapters, with the cleaner previously mentioned above.
2. Use a bottle brush to clean and disinfect the rotor bores.
3. Rinse the rotor and adapter, with clear water. Particularly, the drillings of the angle rotors.
4. When drying the rotor and adapter, set on a towel. Place the angle rotor, with bores down, to
dry.
5. Dry the rotor cone with a soft, dry and lint-free cloth, check for damage. Do not grease the rotor
cone.
6. Put the dry rotor back on the motor shaft.
7. Fix the rotor by turning the rotor nut clockwise.

3.1.4 Disinfection of PP-Rotors

Autoclaving
During autoclaving, it´s quite possible that plastic parts, i.g. rotor, can become deformed!
The recommended time for autoclaving: 15 – 20 min at 121°C/250°F, (1 bar)
ATTENTION: The sterilization time of 20 min. must not be exceeded. Continuous sterilization
will cause reduction in the mechanical resistance, of the plastic material.
Before autoclaving the PP-rotor and adapter, thoroughly clean to avoid the burning of dirty residue.
Please disregard any consequences of chemical residues to plastic materials, at ambient
temperatures. At high temperatures, autoclaving residue may corrode and destroy the plastic. The
objects must be thoroughly washed with distilled water, after the cleaning, but before the
autoclaving. Residues of any cleaning liquids, may cause fissures, whitening and stains.
© Hermle Labortechnik GmbH
Z207A_V1.17
_eng
MAINTENANCE
21