Automated Functions
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TRA Operator’s Manual 20077/021 US 7-7
• Fewer than three BQW cycles have been performed during the current Wash phase and the
volume already processed exceeds 100 ml. (If 100 ml of wash solution has not yet been pumped
to the bowl, then the start of the first BQW cycle will wait until it has.)
The interval between two subsequent BQW cycles is always 200 ml except when air is detected
between two BQW cycles. In this event, the subsequent BQW cycle takes place 200 ml after the
volume recorded when the alarm was sounded.
The BQW state can be set for each protocol from Protocol/Mode tab of the Menu Screen by following
these steps:
1. Touch the Menu button from the Ready Screen.
2. From the left side of the Menu Screen, touch the Protocol/Mode tab.
3. From the Protocol/Mode tab, ensure that an intraoperative or postoperative
protocol is selected from the protocol drop-down menu. Then, touch one of the states of the
BQW button to toggle the activation of the status of the BQW automation: Off, 2x, or 4x. The
section of the button representing the active state appears inset and green.
4. Touch the Save Modifications button to make all changes in the Protocol/Mode tab take
effect. If the screen is exited by touching the Close button, or is interrupted by an alarm, then the
modifications are not saved.
Refer also to “Set the Active Protocol” on page 5-35.
The BQW function may be deactivated in the following ways:
• Manually accessing the Protocol/Mode tab of the Menu Screen.
• Switching to a protocol where this automation is not allowed or is preset to its OFF status (such
as when a PPP or PRP protocol is selected).
Activating or deactivating the BQW during Wash does not alter the volume in the wash solution
counter or the tallied totals stored with the case data.
Better Empty
The Better Empty function is designed to solve problems of incomplete bowl emptying by
automatically activating a further special Empty phase. In case the volume of RBC collected in the RBC
bag is lower than expected for the current bowl size, the bowl is “stirred” by means of a double
alternating acceleration of the centrifuge and an additional Empty phase.
The Better Empty function is activated and deactivated from the Configuration Mode Screen. When it
is active, it is automatically applied to each Empty phase when the system detects that the bowl was
not completely emptied.
When applied, the Better Empty function performs the following sequence after the normal Empty
phase:
1. Stop the pump.
2. Spin the centrifuge clockwise for a short time.
3. Stop the centrifuge; spin the centrifuge counterclockwise for a short time.
4. Start the pump using the Empty phase ramped acceleration and complete an Empty phase again.
The Better Empty function is executed just once per cycle.
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