Describing the PCS2 Device Components
2-7
P/N 85266-30, Manual revision: A
D
ESCRIBING
THE
PCS2
CABINET
COMPONENTS
Optical
line Sensor
Located on the right side of the PCS2 top deck is the optical line sensor which
monitors the blood components passing through the effluent tubing.
Caution
The line sensor will not provide accurate readings if the optical lens it
is obstructed in any way; thus the lens must be cleared of any extraneous sub-
stances to ensure proper functioning of the system.
Weigher
The
weigher
is the term used by Haemonetics to describe the PCS2 component
which measures in grams the contents of the plasma collection container(s)
placed on the
weigher arm
. When the Draw key is pressed to initiate a proce-
dure, the weigher will automatically tare, or deduct the weight of the empty
plasma collection container. Thus, the weight of the container will not be
included in the weight displayed for the PCS2 procedure statistics.
To ensure optimal accuracy from the weigher during a collection procedure:
z
The weigher arm must be fully extended, positioned at a 90 degree an-
gle to the PCS2 top deck, prior to the system self-tests.
z
The plasma collection container must hang freely without any contact
with the PCS2 cabinet.
Caution:
The operator must be careful to not touch the weigher once the weight
of the plasma container has been tared. This could affect the programmed target
plasma quantity and could result in an excessive collection of plasma during a
Draw cycle. If the weigher senses a decrease in the weight during a Return cycle,
an error message will be displayed.
To ensure that the weigher arm is within the appropriate calibration range, the
operator has the option to verify the weight displayed during the READY mode,
prior to the first Draw cycle, as follows:
Î
Remove the plasma container from the weigher arm.
Î
Ensure that the weigher arm is fully extended at a 90 degree angle to the
top deck.
Î
Hang a certified weight (
not exceeding 1300 grams)
from the empty
weigher arm.
Î
Note the value displayed (
and convert to grams if displayed in ml
).
Î
Replace the plasma container on the correctly positioned weigher arm.
The measurement of the weight displayed in grams should be within 1% of the
certified weight.
