Haemonetics MCS+, Operator And Maintenance Manual

Page: 33 / 112

System Description 2-19
P/N 39551-00, Rev. F
System
Pressure
Monitor (SPM)
The System Pressure Monitor (SPM) ensures that the functionally closed sterile
barrier of the rotary seal of the bowl has not been compromised by abnormal
pressure.
The SPM alerts the operator if pressure is increasing or decreasing at the bowl
seal. The SPM works like the DPM. When the SPM has detected positive pressure
in excess of 115 mmHg or negative pressure below -85 mmHg, the pumps stop.
Check the tubing on the effluent side of the disposable to determine that there
are no obstructions.
If the Centrifuge is spinning and pressure is detected, the Centrifuge continues to
spin, but the pumps stop. If the Centrifuge had been stopped, as in a Return
mode, only the pumps stop.
W
EIGHER
The Weigher measures, in grams, the weight of the fluid in the bag placed on it.
For the display, the weight is converted to milliliters using 1.026 grams/milliliter
as the conversion factor. The Weigher automatically compensates for the weight
of the bag when DRAW is first pressed in the collection protocols.
Note: For optimal accuracy of the weigher, always be sure to have the weigher
arm fully extended. The bag(s) on the weigher arm should hang freely.
A
IR
D
ETECTORS
Anticoagulant
Line Air
Detector
(ACAD)
As the anticoagulant is drawn from the anticoagulant bag to the needle site, it first
passes through the drip monitor, the Anticoagulant Pump and then through the
Anticoagulant Line Air Detector (ACAD). The ACAD monitors the anticoagulant
line to ensure there are no obstructions to the anticoagulant flow and that there
is always sufficient anticoagulant in the line.
Blood Line Air
Detector
(BLAD)
The Blood Line Air Detector (BLAD) is located to the right of the Blood Pump
and, although active, is monitoring for air only during Return and at the begin-
ning of Draw.
The BLAD detects the presence of air in the blood line from the bowl to the do-
nor/patient valve during Return and initiates volume accounting during Draw.
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