This document specifies a routine method for the determination of bulk density, called "mass per hectolitre", of cereals as grain using manual or automatic, mechanical, electric or electronic mass per hectolitre measuring instruments. NOTE Further details of the measuring instruments are specified in ISO 7971-2:2019, 6.4.
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Sisällysluettelo
Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Apparatus
6 Procedure
6.1 General
6.2 Hand-operated instruments
6.3 Automatic instruments
6.4 Expression of results
7 Precision
7.1 Interlaboratory trial
7.2 Repeatability
7.3 Reproducibility
7.4 Comparison of two groups of measurements in one laboratory
7.5 Comparison of two groups of measurements in two laboratories
7.6 Uncertainty
8 Test report
Annex A Description of dimensions and use of KERN11 This is an example of a suitable product available commercially. This information is given for the convenience of users of this document and does not constitute an endorsement by ISO of the product named. Equivalent products may be used if they can be shown to lead to the same results. (informative)
Annex B Description of dimensions and use of Nilema litre22 Example of a suitable product available commercially. This information is given for the convenience of users of this document and does not constitute an endorsement by ISO of the product named. Equivalent products may be used if they can be shown to give the same results. (informative)
Annex C Results of interlaboratory tests (informative)
7.4 Comparison of two groups of measurements in one laboratory
7.5 Comparison of two groups of measurements in two laboratories
7.6 Uncertainty
8 Test report
Annex A Description of dimensions and use of KERN11 This is an example of a suitable product available commercially. This information is given for the convenience of users of this document and does not constitute an endorsement by ISO of the product named. Equivalent products may be used if they can be shown to lead to the same results. (informative)
Annex B Description of dimensions and use of Nilema litre22 Example of a suitable product available commercially. This information is given for the convenience of users of this document and does not constitute an endorsement by ISO of the product named. Equivalent products may be used if they can be shown to give the same results. (informative)
Annex C Results of interlaboratory tests (informative)
ISO 7971-2:2019 Cereals -- Determination of bulk density, called mass per hectolitre -- Part 2: Method of traceability for measuring instruments through reference to the international standard instrument
ISO 7971-2:2019 Cereals -- Determination of bulk density, called mass per hectolitre -- Part 2: Method of traceability for measuring instruments through reference to the international standard instrument