Adopts ISO 12745:2008 to provide guidelines to test for bias over a wide range of mass measurement techniques, to estimate the precision for each technique and to calculate the precision for wet mass when estimated by applying one of those techniques.
Table of contents
Header
About this publication
Preface
1 Scope
2 Normative references
3 Terms and definitions
4 General remarks
4.1 Draft surveys
4.2 Belt scales
4.3 Weighbridges
4.4 Hopper scales
4.5 Gantry scales
4.6 Platform scales
5 Certified weights
6 Methods of operation
6.1 General
6.2 Draft surveys
6.2.1 Draft surveys at loading and discharge
6.2.2 Draft survey versus weighbridge
6.3 Belt scales
6.4 Weighbridges
6.5 Hopper scales
6.6 Gantry scales
6.7 Platform scales
Annex A
Annex B
B.1 Terms and symbols
B.2 Measure for central tendency
B.3 Measures for variability
B.4 Measures for precision
B.5 Central limit theorem
B.6 Student’s t-test
B.7 Bias detection limits
B.8 Probable bias ranges
B.9 Correlation-regression
Annex C
Annex D
D.1 Scope
D.2 General information
D.3 Frequency of testing
D.4 Precision test procedures
D.4.1 General
D.4.2 Determining the precision of weighbridges by replicate tests
D.4.3 Determining the precision of weighbridges by replicate tests
D.5 Calibration (bias and linearity test) procedures
D.5.1 General
D.5.2 Calibration procedure using a single certified test weight
D.5.3 Calibration procedure using a set of certified test weights
