Sartorius Centrisart G-16 - Speed, Radius, and Relative Centrifugal Force; Density

2 Layout and mode of operation
14
Version 09/2015, Rev. 1.3 of 02/03/2017
Translation of the original operating manual, WZG6001-e150401
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2.2.2.1 Speed, radius, and relative centrifugal force
The acceleration g, which the samples are subject to, can be increased by increasing
the radius in the rotor chamber and by increasing the speed. These three
parameters are interdependent and linked with each other via the following
formula:
Relative centrifugal force RCF = 11.18 x 10-6 x r x n
2
r = radius in cm
n = speed in rpm
RCF without any dimension
If two values are entered, the third value is determined by way of the stated
formula. If, afterwards, the speed or the radius is changed, the resulting relative
centrifugal force will be recalculated automatically by the control unit. If the RCF is
changed, the speed will be adapted while the specified radius is maintained.
The speed-gravitational-field-diagram provides an overview of the relationship
between speed, radius, and RCF (see chapter 11.2 - "Speed-gravitational-field-
diagram").
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2.2.2.2 Density
The laboratory centrifuge is suitable for the separation of constituents of different
densities in mixtures with a maximum density of 1.2 g/cm
3
. All information
concerning the speed of rotors and accessories refers to liquids with a density
corresponding to this specification. If the density is above this value, the maximum
permissible speed of the centrifuge must be reduced based on the following
formula:
n = n
max
x
)/2,1( Rho
Rho = density in g/cm
3
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