Specifications

Chapter 3: General Considerations
Industry Standards
(12/99) 3-13
The accuracy of a scale can also be described as a percentage of applied load
accuracy. In Figure 3-7 the dashed line indicates a performance of 0.1% of applied
load accuracy, compared with Handbook-44 Class III acceptance tolerances. A 0.1%
(or ±0.05%) applied load accuracy roughly corresponds with the NIST Handbook 44
chart through 5,000 divisions. Notice, however, that the line indicating 0.1% applied
load accuracy falls outside the acceptance tolerance between 3,000 and 4,000
divisions and above 5,000 divisions. Because the 0.1% applied load accuracy method
fails to meet tolerance standards at those points, it should be used only as an
approximation of the acceptance tolerances. NIST Handbook 44 or local Weights and
Measures guidelines should always be used as the actual acceptance tolerances.
Class III
4000d2000d
500d 10,000d
-2.5
-2.0
-1.5
-1.0
-0.5
+2.5
+2.0
+1.5
+1.0
+0.5
0
Number
of
Divisions
0.1 percent or +/-0.05 percent of Applied Load Method
Figure 3-7: Handbook-44 Acceptance Tolerance Table (Percent Applied Load Method)