Haemonetics PCS 2, Руководство пользователя

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2-8 PCS2 Service Manual
5. Disconnect all electrical connections on the top deck distribution
board including the ground.
6. Remove the (6) Phillips head screws securing the top deck distribution
board to the top deck.
Note: The top deck assembly may be removed as an alternative method.
(See page 2-6.)
Weigher Arm Assembly
Note: Extreme care must be used when doing this.
1. Remove the Phillips screw securing the weigher arm to the load cell
standoff.
2. Remove the arm from the load cell upper standoff.
Weigher Arm Reassembly Notes
The weigher arm is secured to the load cell by a screw mounted to the
hexagonal shaped upper standoff assembly. The upper standoff is
permanently attached to the stainless steel stud, connecting to the lower
square standoff mounted inside the spring clip. This mounting
configuration allows the lower standoff to be rotated in one of four
positions. When securing the weigher arm to the upper standoff, ensure
the weigher arm is adjusted to be perpendicular to the machine cabinet
when the lower standoff is in one of its four positions. This may prove to
be difficult without securing the load cell upper standoff with a 1/4 inch
open wrench under the top deck while tightening the weigher arm screw.
If tightened properly the arm and lower standoff will rotate as an integral
piece. Purple Loctite must be used on the screw that attaches the weigher
arm to the upper standoff.
Load Cell
Note: The load cell is a sensitive device and should be handled with care.
1. Remove the front and rear panels. (See page 2-2.)
2. Disconnect P506 from the backplane card and thread the cable around
the side of the card cage.
3. Remove the weigher arm assembly (See above.)
4. Remove the centrifuge assembly (See page 2-12.) or slide the card
cage back (See page 2-4.) approximately six inches to allow clearance
to the weigher load cell.
5. Using a 7/32" wrench (or equivalent), remove the (2) M3 nuts,
washers, and compression springs securing the load cell to the top
deck.
Plasma
Weigher
Assembly