6-16HS
2 Layout and mode of operation
Version 06/2012, Rev. 1.0 • sb-kue
13
Translation of the original operating manual
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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 information concerning the speed of rotors and accessories refers to
liquids with a density that is lower than 1.2 g/cm
3
. If the density is above
this value, the maximum permissible speed of the centrifuge is reduced
based on the following formula:
n = n
max
x
)
/
2
,
1
(
Rho
Rho = density in g/cm
3
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