OHAUS Valor 1000W, Service Manual

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CHAPTER 4 TESTING
Ohaus Corporation www.ohaus.com 4-6 Valor
™ 1000W Series Service Manual
4.4.5 Adjusting Off Center Load
If the Off Center Load (OCL) is excessive, perform adjustment as follows:
A
B
C
D
Weighing Pan’s center,
with points A – D indicated
2
3
1 4
Top view of Load Cell
Side view of Load Cell
Pan
Fixed end
2
1 4
3
Figure 4-2. Scale drawing of Valor 1000W Load Cell and Weighing Pan.
1. Place the test weight in the center of the Weighing Pan.
2. Tare the balance.
3. Move the weight to point A and record the reading.
4. Move the weight to point B and record the reading.
5. Move the weight to point C and record the reading.
6. Move the weight to point D and record the reading.
7. If the reading at point A is negative, file at points 1 and 4 AT AN ANGLE.
8. If the reading at point B is negative, file at points 1 and 2 STRAIGHT ACROSS.
9. If the reading at point C is negative, file at points 2 and 3 AT AN ANGLE.
10. If the reading at point D is negative, file at points 3 and 4 STRAIGHT ACROSS.
Note: It is not recommended that you try to adjust more than
–5 counts if the beam has
been filed already. If the beam has not been filed previously, you can adjust
–10 counts.
Remember, when filing you are weakening the beam. File a little at a time.