System Description
X
TRA Operator’s Manual 20077/021 US 3-9
Centrifuge Assembly
The centrifuge assembly is located at the front of the machine and includes the centrifuge arm,
centrifuge plate, and centrifuge lid. The centrifuge plate rotates at 5,600 rpm during processing and is
not operator adjustable during the autotransfusion protocols. This speed produces rapid separation of
the red cells with minimal trauma. The centrifuge speed can be manually adjusted by the operator
only during PPP and PRP protocols (from 5,600 down to 2,400 rpm).
Figure 3-13 Centrifuge Assembly
The centrifuge assembly (see Figure 3-13) consists of:
1. The (1) centrifuge arm and the position sensor, which senses the correct positioning and locking
of the bowl head.
2. The (2) centrifuge housing, which contains possible leakages of fluids from the bowl.
3. The (3) centrifuge housing light.
4. The fluid loss sensor (not visible in figure), which detects fluid leakages in the centrifuge and
stops the centrifuge and pump in case of a leak.
5. The two RBC (Buffy-Coat) sensors (not visible in figure), high and multipoint, which sense when
the red blood cells have reached a predetermined level within the centrifuge bowl.
6. The centrifuge lid (not visible in figure) that automatically latches and remains locked as a safety
precaution until the centrifuge and pump come to a complete stop.
Note: The X
TRA machine prevents access to the centrifuge (while in operation), through a latched
lid. In the event of a power failure, this latch will open.
CAUTION
If the values regarding volumes, hematocrit, supernatant removal and waste
color line are important for the patient, it will always be necessary to use
other standard measurement instruments of the hospital.
WARNING
Do not open the lid in the event of a power failure if the centrifuge
has not yet come to a stop (which may take between 50 and
90 seconds).
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