When Position Sensor Board Shows Normal Weight, Tighten Its Screws - OHAUS PA64 Service Manual

CHAPTER 3 MAINTENANCE PROCEDURES
3.3.11 Load Cell Reassembly – Precision Balances.
17. Adjust the Position Sensor Board: follow steps 9 through 11 in Section 3.3.9
(summarized here). With the Weighing Pan in its normal position but the Housing
off, power on the balance. The On/Off switch is the middle button on the main PCB.
The Position Sensor Board contains an Optical Sensor which must be positioned in
the Ratio Beam's center of travel for the balance to function properly.
18. Adjust the vertical position of
the Position Sensor Board: if it
is too high or too low, the
display indicates Error 8.X.
Move it until the display
indicates other than 8.X.
Then tighten the screws on
the board. (See Figure 3-47.)
19. When adjustments are
complete, tighten the screws,
carefully checking that the
display does not show an
error 8.X. (If it does, repeat
Step 18.)
20. Install the Load Cell Cover.
21. Perform Off-Center Load Adjustments. (See Chapter 4.)
22. Test the balance. (See Chapter 4.)
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NOTE:
Figure 3-47. When Position Sensor Board shows
normal weight, tighten its screws with an Allen Key.
3-18 Pioneer™ Balances Service Manual