Description
1-4
DOOR
The solid-sheet aluminum door is secured to the housing by solid shafts.
A dual electromechanical door lock system prevents operator contact with
spinning rotors and prevents run initiation unless the door is shut and
latched. The door is locked when a run is in progress and can be opened
only when the rotor is stopped. (A light-emitting diode [LED] on the
[
OPEN DOOR
] key lights up when the door can be opened.) In the event of a
power failure, the door lock can be manually tripped for sample recovery
(see Section 4,
TROUBLESHOOTING
).
ROTOR CHAMBER
The rotor chamber is shown in Figure 1-2. The drive shaft, mounting plate,
rubber boot surrounding the drive shaft, thermistor, and rotor detector are
visible in the chamber bottom. A gasket system around the chamber
opening assures sealing. (Instrument gaskets have not been designed as
bioseals for aerosol containment.)
Figure 1-2. Interior View of the Rotor Chamber
DRIVE
The asynchronous three-phase direct-drive motor is brushless for clean,
quiet operation. A tie-down screw is used to attach the rotor to the drive
shaft. The resilient suspension ensures that loads will not be disturbed by
vibration, and prevents damage to the drive shaft if an imbalance occurs
during centrifugation. Maximum braking may be selected to reduce decel-
eration time, allowing fast processing of samples; alternately, delicate
gradients may be preserved using slower deceleration.
Drive Shaft
Gasket
Rotor
Detector
Thermistor
(refrigerated
models only)
Tapered Sleeve
Boot
