Reassembling The Internal Calibration Mechanism; Disassembly Of Precision Balances With Incal Mechanism - OHAUS PA64 Service Manual

CHAPTER 3 MAINTENANCE PROCEDURES
3.3.4 Servicing the Internal Calibration Mechanism
6. Remove the screws and washers
that secure the InCal Motor.
Note: Before reinstalling the InCal
mechanism, be sure all of its
components are clean and free of
debris. If the InCal Motor or its Cam
is defective, it must be replaced.

3.3.5 Reassembling the Internal Calibration Mechanism

1. Insert the InCal Motor's cam in the hole of the InCal Motor Assembly Insert the four
screws that hold the motor to the assembly and tighten them.
2. Mount the InCal Motor Assembly in the Bottom Housing. Carefully place the motor's
ribbon cable in the groove in the Housing, and thread it beside the RS 232 cable
along the outside of the Housing. Insert its plug in the PCB. Then insert and tighten
the screws that hold the assembly to the Housing.
3. Position the Weight Lifter frame as in Figure 3-11, insert and tighten the screws
holding it to the Housing. (To reassemble Precision Load Cells, see Section 3.3.11.)
4. After installing the Load Cell, place Weights in Weight Holders, and test the InCal
mechanism: see Appendix C, Section C.5.1, Incal Weight Mechanism Testing.

3.3.6 Disassembly of Precision Balances with InCal Mechanism

1. Remove the Load Cell, as
described in Section 3.3.3.
2. Turn the Load Cell over,
so the Weight Arm
assembly is visible.
(See Figure 3-13.)
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Figure 3-12. InCal Motor removed from its assembly.
Figure 3-13. Screws securing Weight Arm assembly.
3-6 Pioneer™ Balances Service Manual
Screws
holding
Weight
Arm