Rotor Chamber; Temperature Sensing And Control; Drive; Controls And Indicators - Beckman Coulter Allegra X-12 Series Instructions For Use Manual

Rotor Chamber

The aluminum rotor chamber is coated with epoxy enamel for corrosion resistance. The chamber
is sealed by a foam gasket.

Temperature Sensing and Control

With the power on, the temperature control system is activated when the door is closed and locked.
A sensor in the rotor chamber continuously monitors chamber temperature. The microprocessor
calculates the required chamber temperature to maintain the selected rotor temperature. Run
temperature in the Allegra X-12R can be set between –10 and +40°C. Temperature in the
Allegra X-12 is factory set at 20°C, and is maintained at between 18 and 22°C to prevent sample
heating.
NOTE
To avoid chamber icing, refrigeration is off when the door is open. The centrifuge door must be closed
and locked for the refrigeration system to begin operating.

Drive

The asynchronous direct-drive motor is brushless for clean, quiet operation. 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 acceleration and deceleration may be
selected to allow fast processing of samples; alternately, delicate gradients may be preserved using
slower acceleration and deceleration.

Controls and Indicators

Power Switch

The power switch, located on the left side of the centrifuge, controls electrical power to the
centrifuge. It is also a circuit breaker that will trip to cut off power in the event of a power overload.
The power switch must be turned on before the chamber door can be opened.

Control Panel

The control panel (see
and access. It is used to enter run parameters via function keys and a keypad, and to display run
parameters, program information, and user messages.
GX-IM-5AB
Figure 1.2) is mounted at an angle on the centrifuge front for easy visibility
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Description
Controls and Indicators
1-3