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4
Rotor Loading
Cycle Counter
Actual Load
Calculate the maximum speed with this formula and set the centrifuge at the calculated maximum
speed:
n
=
per
n
per
n
max
Cycle Counter
The lifetime of rotors and buckets is dependent on the amount of mechanical load. Do not exceed the
number of cycles recommended for rotors and buckets.
The maximum number of cycles is given in the rotor table in the rotor specification section.
The maximum number of cycles for buckets is marked on the buckets themselves.
Service life examples
Usage profile
frequent use
30 runs / day
220 days / year
average use
10 runs / day
220 days / year
Usage profile
frequent use
30 runs / day
220 days / year
average use
10 runs / day
220 days / year
4-4
75006476 LH-4000W
maximum speed
880
900
maximum load
n
-------------------------------------
max
actual load
= permissible speed
= maximum speed
WARNING Replace the rotor when the specified number of cycles is reached. Due to the
mechanical load a rotor can break and thus damage the centrifuge. Replace the buckets
when the specified number of cycles is reached.
Maximum service life at 30,000 cycles
4.5 years
13.6 years
Maximum service life at 20,000 cycles
3 years
9 years
4954
4899
Thermo Scientific
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