Thermo Electron C3i, Руководство пользователя

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C3i-CR3i Use and Function
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If a power failure occurs, access to the samples in the centrifuge is possible via a manual lid opening
procedure (see appropriate paragraph). For this operation a special tool (supplied with the centrifuge) is
required.
Bypass the interlock system only under emergency conditions as the rotor could still be rotating.
1.7. Imbalance Detection System
The C3i centrifuge is equipped with a load imbalance detector.
In case of excessive imbalance, the load imbalance indicator LED is illuminated and the brake is applied
immediately. The rotor will be decelerated to rest in few seconds.
As soon as the motor stops, open the centrifuge and redistribute the samples to produce an equal weight on
diametrically opposite sides.
If the message persists, despite your efforts to balance the load, call your Thermo Service representative.
Note : Imbalance tolerance depends upon the rotor in use. The centrifuge will tolerate 10 gr. of imbalance
with the 4 x 280 mL rotor equipped with standard buckets. Carefully balance the sample load to avoid
actuating the imbalance detection system.
1.8. Relative Centrifugal Force
Relative Centrifugal Force (RCF), at the circumference of a rotor and bucket combination, is directly
proportional to the speed (r.p.m.) and radius of the rotor. Therefore, a greater r.p.m. and/or a larger radius
produces a greater RCF and improved faster separation of substances. The centrifuge control system carries
out and displays the results of all calculations related to speed, radius and RCF.
Note : The value introduced for the radius can be adjusted to allow for position within the tube such as at a
boundary. Maximum radii are quoted in the specifications tables. Use of improper radius will adjust the
speed setting, automatically applying the wrong RCF.