ADV Service Manual P/N 83020790 A
Ohaus Corporation
www.ohaus.com
23
9. Turn the balance OFF and unplug power cord.
10. Remove the Platform and Subflatform if installed.
11. Install the Transducer Shield on the balance and secure with four Screws
12. Refer to paragraph 4.3.2, page 4-11 and re-assemble the balance.
NOTE
:
If the Off-Center Load Adjustment cannot be completed, refer to
thePrecision Test/Adjustment.
4.2.3.3 Off-Center Load Test - Analytical Balances
The Off-Center Load Test is used to determine whether displayed weight values will be affected by moving the
sample to different areas of the Platform.
Place 1/2 of the balance capacity in the center of the Platform. Press the
button to return the reading to
zero. Move the mass halfway (between the center and the edge) to the front of the Platform. Note any differences
in the displayed weight reading. Repeat this test for the back, left, and right positions. Maximum allowable change
in displayed weight readings
is + 5 counts for each of the four positions. If the displayed weight readings change more than 5 counts, proceed
to the following adjustment. To correct an off-center load error, proceed as follows:
Adjustment
1. Refer to paragraph 4.3.1, page 4-10 and open the balance.
2. Remove the two adhesive hole plugs on the transducer shield to gain access to the off center load
adjustment screws.
3. Reinstall the Platform.
NOTE
:
Do not attempt these adjustments on the balance unless the balance is free
from drafts. The Balance is very sensitive and adjustments will be affected.
4. Plug the power cord into the balance and turn the Balance on.
5. Place 1/2 of the Balance capacity on the center of the Platform.
6. Press the >O/T< button to return the displayed weight to 0g. Slide mass front, back, left and
right to Platform edge. Note displayed values. Correct any errors by turning Cornerload Adjusting Screws
shown in Figure 4-5 (adjust the Hex Nut portion and ensure center screw does notturn).