Reinstalling Internal Calibration Components; Load Cell Removal/Installation - Analytical Balances - OHAUS PA64 Service Manual

3.3.14 Reinstalling Internal Calibration Components

When reinstalling the Internal Calibration Components, follow these steps:
1. Insert the InCal Motor's Cam in the hole of the InCal Motor Assembly (see Figure
3-51), insert the four screws that hold the motor to the frame and tighten them.
2. Mount the InCal Motor Assembly in the Bottom Housing. (See Figure 3-50.)
3. Before inserting the screws, carefully place the motor's ribbon cable in the groove in
the Housing, and thread it beside the RS232 cable along the outside of the Housing.
Insert its plug in the PCB.
4. Insert and tighten the screws that hold the assembly to the Housing.
5. Position the Weight Lifter as in Figure 3-50, insert and tighten the screws holding it to
the Housing.
6. Install the Load Cell in the Housing, carefully place the InCal Weights in the Weight
Holders, position the Weight covers above them, insert and tighten the screws.
7. Test the InCal mechanism: see Appendix C, Section C.5.1, Incal Weight Mechanism
Testing.
3.3.15 Load Cell Removal/Installation – Analytical Balances
8. Disassemble the Housing and open
the balance. (See Section 3.2.1.)
9. Carefully unplug the cable that
connects the Main PCB to the
Position Sensor Board. (See
Figure 3-53.)
9. Remove the three screws holding
the Load Cell in place – in the
middle of the Bottom Housing.
(See Figure 3-54.)
10. Carefully lift the Load Cell out of the
base.
11. To re-install the Load Cell, follow
Steps 1 through 4 in reverse.
It is now possible to disassemble the Load Cell
for cleaning, alignment, or replacing parts.
Pioneer Balances Service Manual
CHAPTER 3 MAINTENANCE PROCEDURES
Figure 3-53. Cable connects to
the Position Sensor Board.
Figure 3-54. On Analytical balances, the 3
screws securing Load Cell are on bottom.
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