Chapter 1: Introduction
Scale Accuracy
(2/01) 1-3
Scale Accuracy
Models 2158 and 2160 VERTEX floor scales meet or exceed the National Institute of
Standards and Technology (NIST) Handbook 44 requirements for Class III scales.
Standard VERTEX scales meet 5000-division accuracy. Certificates of Conformance No.
91-097 (2158) and No. 94-010 (2160) were issued under the National Type
Evaluation Program (NTEP) of the National Conference on Weights and Measures. The
Model 2162 VERTEX floor scale has not been submitted for approval.
Applied Weight Allowable Error
0 - 500 Divisions
501 - 2,000 Divisions
2,001 - 4,000 Divisions
4,001 - 10,000 Divisions
± 1/2 Division
± 1 Division
± 1.5 Divisions
± 2.5 Divisions
Figure 1-2: NIST Class III Acceptance Tolerances
Applied Weight Allowable Error
0 - 500 Divisions
501 - 2,000 Divisions
2,001 - 10,000 Divisions
± 1/2 Division
± 1 Division
± 1.5 Divisions
Figure 1-3: OIML Acceptance Tolerances (Model 2158 only)
4000d
2000d
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
4000d
2000d
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