Terumo BCT Trima Accel, Руководство по обслуживанию

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Table 2-6: Centrifuge door and basin components
Name Function
1 Centrifuge door
The centrifuge door separates the centrifuge from the patient and the
operator. When the centrifuge door is closed and the centrifuge is
spinning, the door is held in the locked position by an interlock
solenoid located at the top right of the basin/door opening. This
solenoid, driven by the motor driver CCA, engages a plunger to
activate the lock.
There are two sensors that monitor that the door is closed (an optical
sensor and a Hall-effect sensor) and an optical sensor to monitor that
the door is locked. The door automatically unlocks at centrifuge
speeds less than 60 rpm. An optical switch on the frame assembly
behind the front door (monitored by the safety/ultrasonics CCA) tells
the system when the front door opens and closes. A Hall-effect sensor
(monitored by the control CCA) and a magnet mounted on the front
door also monitor the door. The system prevents the operator from
opening the door while the centrifuge is running at more than 60 rpm
or from running the centrifuge when the door is open. An optical
switch (monitored by the control and safety/ultrasonics CCAs) located
on the solenoid lock assembly tells the system whether or not the
solenoid is in the locked position. The solenoid is not spring-loaded
and will not move if power is removed.
2 Centrifuge door lock release
The centrifuge door lock release manually unlocks the centrifuge door
when the centrifuge door key is inserted through the centrifuge door
key opening to depress the solenoid plunger.
3 Upper collar holder
The upper collar holder attaches the upper end of the centrifuge tubing
to the frame above the centrifuge. The operator loads the upper end of
the tubing by inserting the upper tubing with the collar below the
holder, aligning the collar to the holder, and pulling up until the collar
fully seats in the holder. When the door closes, the collar locks in
place.
4 Upper bearing holder
The upper bearing holder holds the centrifuge tubing in place at the
upper end of the centrifuge arm.
5 Leak detector
The leak detector senses fluid in the basin from leaks in the channel or
tubing. The leak detector is mounted on the back wall of the centrifuge
basin. The leak detector consists of a printed wiring board (PWB) with
traces that are configured to act like a variable resistor. During startup
tests and prior to loading a tubing set, the system checks the ability of
the leak detector to operate normally. A small circuit card is mounted
on the frame near the back of the basin. The leak detector plugs into
this circuit card and the output of the circuit card goes to the control
CCA.
System Description
2-20 Trima Accel
®
Automated Blood Collection System • Service Manual