OHAUS Valor 1000, Service Manual

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CHAPTER 4 TESTING
Valor 1000 Series Service Manual 19 Ohaus Corporation www.ohaus.com
4 TESTING
Before and after servicing a Valor 1000 scale, an operational test and various performance tests
should be made to confirm that the scale meets specifications. Turn the scale on and allow it to
warm up for at least one hour before performing these tests.
NOTE:
Make sure the test area is free from drafts and that the scale rests on a level and
vibration-free surface.
4.1 Test Masses Required
The masses required to test the Ohaus Valor 1000 scales must meet the requirements
of ASTM Class 4 or OIML F2 Tolerance. The mass values are listed in Table 4-1.
TABLE 4-1. TEST MASS VALUES
Model Weight (g)
V12P3X 500, 1000, 2000, 3000
V12P6X 1500, 3000, 4500, 6000
V12P15X 3000, 4000, 9000, 11000, 15000
V12P30X 6000, 8000, 15000, 22000, 30000
V12P2X 500, 1000, 2000
V12P5X 1000, 1500, 2500, 4000, 5000
V12P10X 2500, 5000, 7500, 10000
V12P20X 5000, 10000, 15000, 20000
4.2 Performance Tests
Accurate performance of the Valor 1000 scales is determined by a series of four performance
tests. The displayed readings are compared with the tolerances listed for each test in Table 1-
1, Table 1-2 and Table 1-3. Tolerance values are expressed in counts. A one-count
difference is shown in the last digit on the scale display.
NOTE:
The following performance tests are used to evaluate scale operation before and after repairs.
The scale must meet the requirements specified in each test as well as the other specifications
listed in Table 1-1, Table 1-2 and Table 1-3. Before proceeding with the following tests, the
scale should be calibrated. (See Appendix A.)