Off-Center Load Adjustment For Precision Models - OHAUS PA64 Service Manual

CHAPTER 4 TESTING

4.4.3 Off-Center Load Adjustment for Precision Models

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 4-3 and
4-4. Use a nut driver.
8. Adjust as shown until the
tolerance is +/-5 counts.
9. Use small adjustments, no
more than ¼ turn at
time.Repeat Off-Center Load
Test.
10. Turn the balance OFF.
11. Remove the Platform.
12. Re-assemble the balance.
(See Section 3.3.11.)
13. Turn Auto-Zero back to On,
in Menu Setup.
Ohaus Corporation www.ohaus.com
NOTE:
+
–
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.
–
Figure 4-3. Off-Center Load Adjustments on
Pioneer Precision Balance.
Figure 4-4. Off-Center Load Adjustment screw
holes on Precision models.
4-4 Pioneer™ Balances Service Manual
–
+
–
Adjustment
Screw Holes