Door; Rotor Chamber; Drive; Figure 1-2. Interior View Of The Rotor Chamber - Beckman Coulter Allegra 21 Series Instruction Manual

Description

DOOR

ROTOR CHAMBER

DRIVE

1-4
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
[ ] key lights up when the door can be opened.) In the event of a
OPEN DOOR
power failure, the door lock can be manually tripped for sample recovery
(see Section 4,
TROUBLESHOOTING
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.)
Thermistor
(refrigerated
models only)
Rotor
Detector
Gasket

Figure 1-2. Interior View of the Rotor Chamber

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
Tapered Sleeve
Boot