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11 Appendix
11.1 Formulae – Mathematical Relations
11.1.1
Relative Centrifugal Force (RCF)
The parameters speed, RCF, and the group rotor and radius cannot be specified
independently. They are interrelated via the following formula:
RCF = 11.18 x 10
-6
x r x n
2
If two values are given, the third value is determined by the equation. If then the
speed or the rotation radius is changed, the resulting RCF will be recalculated. If
the RCF is altered, the speed will be adapted accordingly under the consideration
of the radius.
r = radius in cm
n = speed in min
-1
RCF without dimension
11.1.2 Density
If the density of the liquid is higher than 1.2 g/cm
3
, the maximum permissible
speed of the centrifuge is calculated according to the following formula:
n = n
max
x
)
/
2
.
1
(
Rho
Rho = density in g/cm
3
11.1.3 Speed-Gravitational-Field-Diagram
Additional help can be found in the enclosed speed-gravitational-field-diagram
(page 54).
Operating Manual SIGMA 1-6P
page 53 of 67
05/2007
Содержание 1-6P
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