P/N 53063-30, Manual revision: B
5-5
Cell Saving using Automatic Operation
Washing the cells
When the CS5+ system detects that the bowl contains the appropriate quan-
tity of red blood cells, the device will automatically enter the WASH state
and provide the following information:
Figure 5-4, Example of a double WASH state screen display
Pressing the Yes key will double the program wash volume for this wash cy-
cle only. This prompt will be available for the entire wash sequence until the
minimum wash volume is reached.
When the double wash volume WASH state is complete, the machine will
revert back to the original programmed wash volume.
The minimum wash volume parameter can be modified by the operator as
described in the section
Describing additional auto mode functions
.
During the automatic WASH state, the CS5+ system will optimize the pro-
cess by operating at pump rates within the following ranges:
!
Latham 225 ml bowl: 200 to 500 ml/min.
!
Latham 125 ml bowl: 200 to 300 ml/min.
!
70mL Bowl: 100 ml/min and after 5/6 of the wash volume 75 ml/min.
If an RBC spill occurs into the waste bag during automatic operation when
using a Latham bowl, the pump rate will decrease then automatically in-
crease when the system detects that RBCs are no longer being spilled.
For all bowl types, the system will automatically extend the wash (up to two
times) in preset increments according to bowl size, until the effluent line is
clear.
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