CHAPTER 3 MAINTENANCE PROCEDURESOhaus Corporation www.ohaus.com 3-16 Pioneer™ Balances Service Manual3.3.11 Load Cell Reassembly – Precision Balances.Figure 3-39. Sideways MotionStop Plate.Figure 3-40. Two screws secure Magnet Half.5. Position the Sideways MotionStop Plate so the small post inthe Ratio Beam is centered inthe hole in the Stop Plate. Theninsert and tighten the two screwsand washers. (See Figure 3-39.)6. Position the Temperature Sensorwires so they clear the opening on thebottom of the Magnet Half. (SeeFigure 3-40.) Install the Magnet Half infront of the Ratio Coil, so screw holesalign. Insert the two screws andtighten them.7. Carefully remove the tape from theContact Board (see Step 13, page3-11) and re-position the ContactBoard on the Load Cell frame. Beextremely careful not to stress orbreak the fine wires attached to theContact Board.8. Glue the Contact Board to theframe, as in Figure 3-41. Figure 3-41. Contact Board.9. Attach the Position Sensor Board to the Load Cell frame, using three screws. (SeeFigure 3-35.) The left side screw goes in the outside hole. It has no washer. Thetwo right-side screws both have washers. Install screws finger-tight, so the boardcan 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 bottomof the Position Sensor Board, and the two on the top. The twoon the bottom must be re-soldered in the same positions aspictured in Figure 3-42: white on left, red on right. The twowires on the top connect to the Temperature Sensor. Theirorder is not important.Figure 3-42. Solderpoints on PositionSensor Board.
