Operation
44
Check carefully whether your tubes
are approved for the respective
RCF value. If not, reduce speed.
Filling the centrifuge tubes
For common borosilicate glass tubes, the maximum
permissible RCF is limited to 4000 x g!
The tube manufacturers normally limit the respective
maximum permissible RCF value to the fixed angle
rotor.
Maximum permissible load difference
The smaller the imbalance of the centri-
fuge
,
the better the separation effect, be-
cause there are no turbulences in the
separated zones caused by vibrations.
Therefore it is important, that the tubes are balanced
properly.
The permissible load difference depends on many
factors (e.g. rotor, loading). For the swinging bucket
rotors LH-4000 and LH-4000W this difference
amounts to at least 30 g in opposite carriers.
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 the liquid column to
the tube bottom is considerably higher and strongly
depended on filling.
Plastic tubes – especially for the highest load (speed,
temperature) – have a limited service life only and
must be replaced. For detailed questions please
contact the manufacturer of the plastic tubes.
Summary of Contents for Cryofuge 5500i GMP
Page 16: ...Description of the Cryofuge 12 Notes ...
Page 20: ...Before the use 16 Notes ...
Page 70: ...Maintenance and care 66 ...
Page 99: ...Appendix 95 ...
Page 107: ...Appendix 103 ...
Page 113: ......