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36
Setting rotor position 1
Only authorized skilled personnel may set rotor position 1.
If the rotor was changed and if this has another rotor code than the previously used rotor, a rotor detection
procedure must be carried out first before rotor position 1 is set (see chapter "Rotor recognition").
Every time the rotor is installed, rotor position 1 must be reset afterwards. Rotor position 1 is the position where place
1 of the rotor must be located for loading and unloading. Rotor position 1 can be set as follows when the rotor is at a
standstill:
Look through the window in the lid to make sure that the rotor is at a standstill.
Turn the key to the "TEACH" setting. For example, Teach Open =Close might be displayed.
Keep the
key pressed until the hatch is completely open. Teach =Open Close is displayed.
Press the
key. The saved rotor position 1 is displayed, e.g. Teach Pos 1 : 1812 <Start=ok>.
PROG
Turn the rotor slowly in an anti-clockwise direction until you hear an acoustic signal. Then continue turning until
position 1 of the rotor is in the desired loading and unloading position.. Hold the rotor in this position.
Press the
button to save the setting.
START
As a confirmation, store Pos 1 ... is briefly displayed, and then e.g. Goto 1/24 2826
If "no zero pulse !" is briefly displayed, the rotor was turned to the loading/unloading position before the
acoustic signal sounded. In this case, repeat the rotor position 1 setting.
If Close the Lid ! is displayed briefly, the lid is open. In this case, close the lid.
To test the positioning, set the desired rotor place with the rotary knob , and then press the
rotor continues to turn until the set rotor place is in the loading/unloading position.
Press the
key to exit the menu. Teach =Open Close is displayed.
STOP / OPEN
Keep the
key pressed until the hatch is completely closed. Teach Open =Close is displayed.
RPM
Turn the key back to the "LOCK 2" position.
37
Relative centrifugal force (RCF)
The relative centrifugal force (RCF) is given as a multiple of the acceleration of gravity (g). It is a unit-free value and
serves to compare the separation and sedimentation performance.
These values are calculated using the formula below:
RCF
RCF = relative centrifugal force
RPM = rotational speed (revolutions per minute)
r = centrifugal radius in mm = distance from the centre of the turning axis to the bottom of the centrifuge
The relative centrifugal force (RCF) stands in relation to the revolutions per minute and the centrifugal
radius.
76/83
2
RPM
r
1,118
1000
container. For more on the centrifugal radius see the chapter
"Anhang/Appendix,Rotoren und Zubehör/Rotors and accessories".
RCF
RPM
r
1,118
0 2826 s.
key. The
START
1000
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