Describing the PCS2 Device Components
2-9
P/N 85266-30, Manual revision: A
Valves
There are three valves located on the PCS2 top deck which automatically control
the flow of fluids through the disposable set tubing. The valves are color-coded
according to their specific functions.
The PCS2 safety system will control the valves during the self-diagnostic tests.
Once the operator has selected a collection procedure, the appropriate valves
will automatically open, in preparation for loading the disposable set tubing. If
the disposable tubing needs an adjustment during a procedure, it is possible to
open a valve manually by pressing the valve lever located at the top of each valve.
Warning: Any manual adjustment to a valve should be attempted only if the
PCS2 device is POWERED-OFF, in the READY mode, or when the pumps are
stopped. At any other time, the PCS2 safety system will be alerted and will in-
terrupt the procedure. Manipulating a valve could lead to flow problems, and
eventually cause hemolysis.
Donor valve (red)
The donor valve is located the furthest to the left on the PCS2 top deck.
z
During the DRAW mode it remains open so that anticoagulated whole
blood can flow from the donor into the centrifuge bowl.
z
During the RETURN mode it remains open so that components remain-
ing in the disposable tubing and centrifuge bowl can be returned to the
donor.
Plasma valve (yellow)
The plasma valve is located between the donor valve and the saline valve.
z
During the DRAW mode it remains open to direct plasma and air flow-
ing through the effluent tubing into the plasma collection container.
z
During the RETURN mode it remains open, except for a brief period
when the effluent line is cleared during a standard bowl procedure.
It is closed during automatic saline compensation to the donor.
Saline valve (white)
The saline valve is located the furthest to the right on the PCS2 top deck. It will
will be used to direct saline solution through the tubing, with the exception of a
multi-bag plasma collection procedure.
z
During the DRAW mode it will be closed.
z
During the RETURN mode it will be open to permit the passage of fluid
through the effluent tubing.
Note: When the selected PCS2 procedure uses more than one plasma collection
bags, plasma will be distributed equally between the bags, using the plasma valve
to route half of the plasma being collected, and the saline valve to route the other
half. The two valves will not be open at the same time during DRAW, therefore
automatic saline compensation is not a possibility when more than one plasma
bag is used.
