Centurion Scientific PrO-Hospital Ambient Інструкція з експлуатації - Сторінка 15
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Друкувати сторінкуNomograph. For Rcf evaluation.
NOTE centrifuges can be programmed in Rcf(G)
Example
To find the relative centrifugal force
at a radial distance of 10 cm from
the center of rotation when
operating the centrifuge at a speed
of 3000 r.p.m., place a straightedge
on the chart connecting the 10cm
point on the Rotating Radius Scale
(A) with the 3000 r.p.m. point on
the Speed Scale (B).
Read the point at which the
straightedge intersects the Relative
Centrifugal Force Scale (C) – in this
case, 1000 x gravity.
Similarly, if the desired "r.c.f." is
known, the necessary speed for a
given rotating radius may be
determined by connecting the two
known points and reading the
intersection of the straightedge with
the Speed Scale.
Equation for Calculating R.C.F.
R.C.F. = .00001118 x r x N 2
R.C.F. = relative centrifugal force (gravities)
r = radius from center of rotation to bottom of tube (cm)
N = rotating speed (rev. per minute)
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