Chapter 2, Machine Part Replacement Reference
2-9
Load Cell Reassembly Notes
1. When routing the P506 wire, run the wire between the front panel and
the pinch valves. Do NOT run the wire between the backplane card
and the pinch valves. This could cause the machine to short out.
2. When attaching the load cell to the top deck, the spring fits over the
securing shaft first, then the washer and then the nut. When tightening
the nuts, tighten until nut is even with the bottom of stud. Turn nut six
more complete revolutions.
3. Recalibrate the weigher assembly following the procedure in Chapter
4, Calibration.
Load Cell Lower Standoff Replacement
Note:
The load cell lower standoff replacement should only be performed
by Haemonetics personnel.
1. Remove the load cell assembly. (See page 2-8.)
2. Using a 1/4" wrench, secure the load cell’s upper standoff and using a
5/64" hex wrench, remove the setscrew located inside the load cell’s
lower standoff. (Save this setscrew as it will be reinstalled in the
replacement standoff.)
3. Securing the upper standoff, unscrew and remove the lower standoff
from the load cell assembly.
Note:
Do not remove the upper standoff from the load cell assembly.
Load Cell Lower Standoff Reassembly Notes
1. When installing the replacement standoff, ensure that the standoff is
between the spring clip.
2. When securing the standoff to the load cell assembly, tighten the
upper standoff to the lower standoff until the entire assembly is hand
tight, and then secure the standoff assembly by tightening the setscrew
in the lower standoff using the 5/64" hex wrench.
3. Ensure that the upper standoff rotates smoothly and easily with a
slight click before reinstalling the load cell assembly.
4. Recalibrate the weigher assembly, following the procedure in Chapter
4, Calibration, after the load cell and weigher arm have been
reinstalled.
Pinch Valves
1. Remove the front panel. (See page 2-2.)
2. Using 11/16" wrench (or equivalent), remove (1) #8-32 nut securing
the ground wire of the valve to be removed to the ground lug.
