Kendro Sorvall Legend RT, Инструкция по эксплуатации

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Operation
44
Filling the centrifuge tubes
Check carefully whether your tubes
are approved for the respective RCF
value. Follow tube manufacturers
recommendation.
For common borosilicate glass tubes the maximum
permissible rcf is limited to 4000 xg!
The tube manufacturers normally limit the respective
maximum allowed RCF value to the fixed angle rotor.
Please note that for the same RCF value
the stress for the tubes in a swinging-
bucket rotor is higher!
Because of the higher difference of the
radii (r
max
- r
min
) the pressure of liquid column to the
tube bottom is appreciably higher and strongly de-
pended on filling.
Plastic tubes and bottles – especially for the highest
load (speed, temperature) – have a limited life time
only and must to be replaced as recommended by the
manufacturer.
Maximum permissible load difference
The smaller the imbalance of the centrifuge,
the better the separation effect, because as
imbalance is minimized, so is the resultant
vibration that could affect separation quality.
Therefore it is important, that the tubes are balanced
properly.
The maximum permissible load difference depends on
several factors (e.g. rotor, loading). For a swinging
bucket rotor 7500 6445 this amounts to at least 20 g in
opposite carriers.
The values refer to a weight difference on the bottom of
the tube. If there is a weight difference resulting from
inhomogeneously filled tubes, the centrifuge can oper-
ate with larger weight differences as well, without caus-
ing an imbalance interruption.