Thermo Electron C3i, Руководство пользователя

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1.4. Refrigeration and Heating Systems
The C3i is a ventilated unit. A permanent air circulation reduces the heat level in the bowl.
However the temperature in the bowl can exceed 10 °C above the ambient temperature after hours of
continuous operation.
The CR3i is equipped with a powerful refrigeration system that allows samples to be
processed at low temperature. The refrigerant, R134a, is free of CFC (Chloro-Fluoro-
Carbons) in accordance with the Montreal Protocol directions for preservation of the
ozone layer in the atmosphere.
The actual temperature in the bowl is continuously displayed on the front panel of the centrifuge. Under
certain conditions (high speed, long duration runs) the sample temperature can be higher than the bowl
temperature on the display. In this case, the user may compensate manually after empirical determination
of the temperature differential.
Condensation drain on refrigerated units
The lid should remain closed when the refrigeration system is in use to avoid
condensation.
The centrifuge has a rubber hose that allows condensation to be drained from the
bowl. The drain hose exits at the back of the machine. Near the drain hose you
can find the following label:
To remove condensation, please follow this procedure:
- Switch off the centrifuge and disconnect the power.
- Put a small basin under the hose.
- Unplug the hose.
- Drain the centrifuge bowl.
- Insert the plug back into the hose.
ATTENTION: Do not remove the plug from the drain hose during centrifugation.
1.5. Drive System
A three phase brushless motor drives the rotating equipment. The rotor is contained in a sealed, armor
plated centrifugation chamber.
The brushless motor requires no maintenance . A control system ensures the correct drive speed, which is
continuously monitored.
1.6. Safety Interlock System
The C3i and CR3i centrifuges are equipped with an interlock system that assures two basic safety features:
- The run cannot be started if the lid is not correctly closed.
- The centrifuge lid cannot be opened if the rotor is running.
The centrifuge will not operate until the lid is closed and latched in place.
The lid remains latched until the rotor stops spinning. The lid access lamp indicates when the rotor has
stopped: consequently the handle on the right hand side of the centrifuge can be used to open the lid.
C3i-CR3i Use and Function
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