Sigma 4-15C, Руководство по эксплуатации

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Operating Manual SIGMA 4-15C, page 77 of 95
03/06
8.2 Care and Cleaning of Accessories
For care of accessories special safety measures must be considered as these
are measures ensuring operational safety at the same time.
Buckets, trunnions and also synthetic buckets are produced exactly in order to
withstand the permanent high stress with high gravitational fields.
Chemical reactions as well as stress-corrosion (combination of oscillating pres-
sure and chemical reaction) can affect or destroy the metals. Hardly detectable
cracks on the surface expand and weaken the material without visible signs.
When detecting a visible damage of the surface, a crack, a mark or any other
change, also corrosion, the part (rotor, bucket etc.) must be replaced immedia-
tely.
In order to avoid corrosion, rotor incl. tie-down screw and cover seal, buckets and
carriers must be cleaned and greased regularly with the supplied slushing oil
(SIGMA part no.: 70104 for 20 ml slushing oil). Before using detergents or
decontamination agents which had not been recommended by us, the user has
to contact us to make sure that such procedure would not damage the centrifuge.
The rotor tie-down screw must be greased using the supplied grease (SIGMA
part no.: 70284).
Cleaning of accessories should be done outside of the centrifuge once a week or
preferably after every use. The rubber cushions should be removed from buckets
and carriers. After this the parts should be dried with a soft cloth or, alternatively,
in a drying chamber at approx. 50
°
C. If there is the risk of toxic, radioactive
or pathogene contamination, special safety measures must be kept.
Especially aluminium parts are extremely corrosive. A neutral cleaning detergent
with a pH-value between 6 and 8 should be used for such parts. Alkaline agents
exceeding pH 8 must be avoided. Especially aluminium parts must be greased
regularly with slushing oil. This procedure essentially increases life time and
reduces corrosion.
Careful maintenance increases life time and avoids premature failure of the rotor.
Corrosion or resultant damages which are caused by insufficient care do not
constitute a warranty claim.
8.3 Rotor Pins
The trunnion pins of the rotor should always be greased as only this ensures
evenly swinging of buckets and thus quiet run of the centrifuge (part no. 70284
Grease).