Sideways Motion Stop Plate - OHAUS PA64 Service Manual

CHAPTER 3 MAINTENANCE PROCEDURES
3.3.11 Load Cell Reassembly – Precision Balances.
Figure 3-39. Sideways Motion
Stop Plate.
5. Position the Sideways Motion
Stop Plate so the small post in
the Ratio Beam is centered in
the hole in the Stop Plate. Then
insert and tighten the two screws
and washers. (See Figure 3-39.)
7. Carefully remove the tape from the
Contact Board (see Step 13, page
3-11) and re-position the Contact
Board on the Load Cell frame. Be
extremely careful not to stress or
break the fine wires attached to the
Contact Board.
8. Glue the Contact Board to the
frame, as in Figure 3-41.
9. Attach the Position Sensor Board to the Load Cell frame, using three screws. (See
Figure 3-35.) The left side screw goes in the outside hole. It has no washer. The
two right-side screws both have washers. Install screws finger-tight, so the board
can be moved for adjustment, in Step 17 below.
10. Solder the 3-wire Ribbon Cable to the Contact Board. (See Figure 3-41.)
11. Solder the two small wires to the solder points on the bottom
of the Position Sensor Board, and the two on the top. The two
on the bottom must be re-soldered in the same positions as
pictured in Figure 3-42: white on left, red on right. The two
wires on the top connect to the Temperature Sensor. Their
order is not important.
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Figure 3-40. Two screws secure Magnet Half.
6. Position the Temperature Sensor
wires so they clear the opening on the
bottom of the Magnet Half. (See
Figure 3-40.) Install the Magnet Half in
front of the Ratio Coil, so screw holes
align. Insert the two screws and
tighten them.
Figure 3-41. Contact Board.
3-16 Pioneer™ Balances Service Manual
Figure 3-42. Solder
points on Position
Sensor Board.