Scale Calibration (For Models With a Scale) 4 - 9
The verification tests outlined in Table 4-4 and Table 4-5 can be run in successive order. Use the appropriate table
based on US (lb), or metric scales (kg), using applicable tolerance for single or dual interval scale models.
Decreasing Load Test This test verifies accurate weight measurement with decreasing weights removed
incrementally from the scale's platter, without returning weight to zero.
Return to Zero Test This test verifies that the scale returns to zero when all weights are removed.
Shift Test This test verifies accurate weight measurement in all quadrants.
Table 4-4 Verification Tests for US (lb) Scales
Verification Test for US Scale
Applied Load lb
Indication = Applied Load
Within Applicable
Tolerances
All Tolerances Are
+/-
All Tolerances Are
+/-
Acceptance Single
Int
Acceptance Dual
Int
Increasing Load Test
0.00 0.00 0.0 lb 0.0 lb
0.10 0.10 .005 lb .0025 lb
5.00 5.00 .005 lb .005 lb
10.00 10.00 .01 lb .005 lb
20.00 20.00 .01 lb .01 lb
30.00 30.00 .015 lb .015 lb
Over Capacity Test
Over Capacity 30.20 EEEE N/A N/A
Decreasing Load Test
30.00 30.00 .015 lb .015 lb
20.00 20.00 .01 lb .01 lb
10.00 10.00 .01 lb .005 lb
5.00 5.00 .005 lb .005 lb
0.10 0.10 .005 lb .0025 lb
Return to Zero Test
0.00 0.00 0.0 lb 0.0 lb
Shift Test (see
Figure 4-5)
10.00 Position 1 10.00 .01 lb .005 lb
Table 4-3 Tests to Verify Scale Accuracy (Continued)
Test Description
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