CHAPTER 4 TESTING
Valor 1000 Series Service Manual
23
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7. Place the test mass on the Scale and record the weight.
8. The difference in the weights of the test mass should be within
±2 d
, as specified in
the Table 1-1, Table 1-2 and Table 1-3. If not, calibrate (see Appendix A) and
repeat the test.
9. If the Scale remains out of tolerance, the Load Cell may need to be replaced.
4.2.4 Off-Center Load Test
The Off-Center Load Test is used to determine whether displayed weight values are affected by
moving the sample to different areas of the Pan.
1. Place 1/3
of the scale’s capacity in the center of the Pan.
2. Note the reading.
3. Move the mass halfway (between the center and the edge) to the front of the Pan.
Note any differences in the displayed weight reading.
4. Repeat the test for the back, left, and right position of the Pan.
Maximum allowable change in displayed weight readings for each of the four positions can
be in
±2 d.
5. If this maximum is exceeded, follow procedures in Section 4.2.5, Adjusting Off
Center Load.
4.2.5 Adjusting Off Center Load
If the Off Center Load (OCL) is excessive, perform adjustment as follows:
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