OHAUS TROOPER, Руководство по обслуживанию

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4-5
CHAPTER 4 TESTING
1. Zero the scale.
2. Place a test weight equal to 1/2 the scale capacity in the center of the weighing platform and
record the reading.
3. Move the test weight to the mid-point between the center and the left edge of the weighing
platform and record the reading.
4. Move the test weight to the mid-point between the center and the rear of the weighing platform
and record the reading.
5. Move the test weight to the mid-point between the center and the right edge of the weighing
platform and record the reading.
6. Move the test weight to the mid-point between the center and the front of the weighing
platform and record the reading.
7. Subtract the center position reading from the reading at each outer position. The difference
at each test position should be within the cornerload tolerance specified in Table 4-1 for
Trooper Scale and Table 4-2 for Trooper Count Scale.
4.3.3 Linearity Test
The Linearity test is used to determine the linearity of the scale throughout its operating range.
NOTE ::::: The scale must pass the Repeatability and Off-Center Load Tests before the Linearity test is
performed. Before performing this test, calibrate the scale according to Appendix A.
1. Place masses totaling 1/3 of the capacity of the scale on the platform and note the weight. Set
this mass aside, it will become the test mass.
2. Place masses totaling 1/3 of the capacity of the balance on the platform and zero the scale.
3. Place the test mass on the platform and record the weight.
4. Place masses totaling 2/3 of the capacity of the scale on the platform and zero the scale.
5. Place the test mass on the platform and record the weight.
6. The difference of the 3 recorded weights should be less than or equal to the tolerance values
listed in tables 4-1 and 4-2.
4.3.2 Off-Center Load Test (Cont.)