Hettich ROTOFIX 46 Mode D'emploi page 68

Software operation
7.1.2 Centrifugation of substances or mixtures of substances with a density higher than
1.2 kg/dm
7.2 Programming
7.2.1 Write protection for programs
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RCF = Relative Centrifugal Force
RPM = speed
r = centrifuging radius in mm = distance from the centre of the axis of
rotation to the bottom of the centrifuge tube.
3
The density of the substances or mixtures of substances must not exceed
1.2 kg/dm³ during centrifugation at maximum speed. The speed must be
reduced for substances or substance mixtures with a higher density. The
permissible speed can be calculated using the following formula:
For example: Maximum speed 4000 RPM, density 1.6 kg/dm³
If, in exceptional cases, the maximum load indicated on the bucket is
exceeded, the speed must also be reduced. The permissible speed can
be calculated using the following formula:
For example: Maximum speed 4000 RPM, maximum load 300 g, actual
load 350 g
Please contact the manufacturer if you are not sure.
The programs can be protected to prevent unintentional changes.
When the rotor is at a standstill, write protection can be enabled or disabled
as follows:
1. Press and hold the
'SOUND/BELL' is displayed after 8 seconds.
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2. Press the
'LOCK' is displayed.
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Rev.: 09 / 11.2023
[SELECT] button.
[SELECT] button.
AB4600en