Operating Manual SIGMA 4-15C, page 74 of 95
03/06
7.2
Forbidden Centrifuging Operations
1. Operation of not carefully installed centrifuge.
2. Operation without front or back panels.
3. Operation by non authorized personnel.
4. Operation with rotor not installed properly (refer to chapter 3.3).
5. Operation with incompletely loaded drum rotor, swing-out rotor or angle rotor
with interchangeable buckets.
A rotor must always be loaded completely, empty places are not allowed!
Opposite buckets or carriers may nevertheless be empty. Mixed loading is
allowed, if opposite places are loaded with same buckets and carriers of
same weight.
6. Operation with overloaded rotors.
he load for a rotor is limited by its design and the max. speed (see
rotor/bucket engraving) and must not be exceeded. The rotors are intended
for liquids of max. homogeneous density of 1.2 g/cm
3
if centrifuged at max.
speed. If liquids of higher density are used, the speed must be reduced
accordingly (refer to chapter 9.4 "Mathematical relations").
7. Operation with rotors, buckets and carriers showing corrosion or other
defects.
8. Operation of very corrosive substances which can cause damages to material
and affect the mechanical strength of rotors, buckets and carriers.
9. Operation of rotors and accessories not allowed by the manufacturer. The
use of poor commodity goods is not recommended. At high speeds breaking
glass or bursting vessels can cause dangerous imbalances.
10. Operation in hazardous locations.
11. Operation with vessels of improper size.
12. Centrifugation of improper material.
13. Operation with partially filled plastic tubes in high-speed angle rotors.
14. Lifting or moving of the centrifuge during operation. Leaning against or resting
on the centrifuge is not allowed.
15. Do not place potential dangerous material - eg. glass vessels containing
liquids - near the centrifuge.
Summary of Contents for 4-15C
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