CHAPTER 4 TESTING
Pioneer
™ Balances Service Manual
4-5
Ohaus Corporation www.ohaus.com
4.4.4 Off-Center Load Adjustment for Analytical Models
NOTE:
Do not attempt these adjustments unless the balance is free from drafts.
The balance is very sensitive and adjustments will be affected.
1. Set Auto-Zero to Off, in Menu Setup.
2. Open the balance. (See
Section 3.1.)
3. Reinstall the Pan.
4. Plug the power cord into the
balance and turn it on.
5. Place a mass that weighs the
balance’s full capacity on the
center of the Pan.
6. Press
O/T
(the center button)
to tare the balance and return
the displayed weight to 0g.
Move the mass to the front,
back, left and right edges of
the Pan. Note the displayed
values.
7. Correct any errors by turning
Corner-load Adjusting screws
as shown in Figures 4-5 and
4-6. Use a 6mm nut driver.
8. Adjust as shown until the
tolerance is +/-5 counts.
+
–
+
–
+
–
+
–
Figure 4-5. Off-Center Load Adjustments on
Pioneer Analytical Balance.
9. Use small adjustments, no
more than ¼ turn at time.
10. Repeat the Off-Center Load
Test.
11. Turn the balance OFF.
12. Remove the Platform.
13. Re-assemble the balance.
(See Section 3.3.17.)
14. Turn Auto-Zero back to On,
in Menu Setup.
Figure 4-6. Off-Center Load Adjustment screw
holes on Analytical models.
Adjustment
Screw Holes
Turn in direction shown by arrows. For errors
front to back turn both adjustments the same
direction. For side to side errors turn in
opposite directions.
Summary of Contents for Pioneer PA64
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