OHAUS Valor 1000, Service Manual

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CHAPTER 4 TESTING
Valor 1000 Series Service Manual 22 Ohaus Corporation www.ohaus.com
9. Add the ten Delta x Delta values and divide by 9 Calculate the Standard Deviation by
applying the square root of the result from step 8.
Standard Deviation =___________
Note:
If the balance does not meet specifications, move it to a suitable location, ensure
that it is level, and try again.
4.2.3 Linearity Test
This test is used to determine the linearity of the unit throughout its operating range.
The masses used to perform this test can be utility masses
NOTE:
The scale must pass the Precision and Repeatability Tests, and be calibrated before
the Linearity Test may be performed.
TABLE 4-3. LINEARITY TEST MASSES
Capacity (g) 3000 x .5g 6000 x 1g 15000 x 2g 30000 x 5g
Reference Wt. 1000 1500 4000 8000
Load 1 500 1500 3000 6000
Load 2 1500 3000 9000 15000
Load 3 2000 4500 11000 22000
Capacity (g)
2000 x .2g 5000 x .5g 10000 x 5g 20000 x 10g
Reference Wt. 500 1200 2500 5000
Load 1 500 1200 2500 5000
Load 2 1000 2500 5000 10000
Load 3 1500 3800 7500 15000
NOTE:
All masses are nominal values. Use the same reference mass throughout the procedure.
1. Place the test mass on the Scale, record the weight and remove.
2. Place Load 1 on the Scale and press Tare
3. Place the test mass on the Scale, record the weight and remove.
4. Place Load 2 on the Scale and press Tare
5. Place the test mass on the Scale, record the weight and remove.
6. Place Load 3 on the Scale and press Tare