Heraeus CRYOFUGE 6000i, Руководство по эксплуатации

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Loading the Rotor
22
Filling the vessels
Centrifuge vessels of up to approx. 30 mm diameter can be filled according to visual estimations (approx. 5
- 10 mm under the rim, depending on size).
With a larger quantity of the same vessels, small differences in weight between the individual vessels statis-
tically even themselves out.
Permitted imbalance
In order to avoid imbalances, it is recommended to load opposite facing positions with adapters, multiple
carriers, tubes, bottles etc of the same kind as well as filled to the same level.
Imbalance causes running noises and has negative effects on the drive system (premature wear of the
motor bearing).
The permitted difference in total weight (or loading) of opposite facing buckets should not exceed 10 grams.
Blood bags should be weighed out to a maximum tolerance of 5 grams. The better the counterbalance, the
better the running performance of the centrifuge: improvement in the separating quality, because the whirl-
ing up by oscillations of areas already separated can be avoided.
To establish the bucket weight, any laboratory scales, or even better, counterbalancing scales are suitable.
Maximum load
At high speeds, enormous centrifugal forces occur, which stress the arms and other rotor parts. Therefore,
each rotor only has a limited strength and lifecycle.
HERAEUS rotors are designed so that they have a high reserve of strength even with maximum loads and
speeds. However, the maximum values must not be exceeded, as otherwise the lifecycle of the rotor and
buckets is considerably shortened.
The user is responsible that overloading of the rotor does not occur, by observing the maximum swing
bucket weights.
The maximum load is reached when the filled liquid has a density of 1.2 g•cm
-3
when using plastic buckets.
In cases of higher densities or when using steel buckets, partial filling must be applied. The weight must not
exceed the value that is reached with a complete filling of a liquid with the density of 1.2 g•cm
-3
.
Alternatively, the maximum permitted speed n
max
is to be reduced according to the following formula:
ORDG WKH RI ZHLJKW WRWDO LQFUHDVHG
Q IRU ORDG WKH RI ZHLJKW WRWDO SHUP
Q Q
PD[
PD[ SHUP
™ =
CAUTION!
For density values over 2.0 g•cm
-3
, you should always contact KENDRO in Osterode!
You can reach the service department under the telephone number +49 5522 316 0.