BS EN ISO 7971-2:2019

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Cereals. Determination of bulk density, called mass per hectolitre – Method of traceability for measuring instruments through reference to the international standard instrument

Published By	Publication Date	Number of Pages
BSI	2019	30

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Description

This document specifies a test method for ensuring the traceability of bulk density, called “mass per hectolitre”, measuring instruments through reference to standard measurement instruments. The mass per hectolitre is of commercial importance for grain cereals. Several types of instruments with varying performances exist for measuring it.

This document also specifies the performances required of national standards instruments, secondary standards instruments, and measuring instruments used in laboratories or in collection or storage silos.

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PDF Pages	PDF Title
2	National foreword
4	European foreword
6	Foreword
7	1 Scope 2 Normative references 3 Terms and definitions
8	4 Requirements 4.1 Certified international or national standard instrument 4.2 National standard instrument 4.3 Secondary or internal standard instrument
9	4.4 Routine measuring instrument 5 Principle 6 Apparatus
10	7 Procedure 7.1 Traceability of national standard instruments through reference to the certified international or national standard instrument 7.1.1 General description
11	7.1.2 Preparation of the test samples 7.1.3 Use of the referenced test samples 7.1.4 Interpretation of the results
12	7.1.5 Adjustment of the national standard instrument 7.2 Traceability of the secondary standard instruments through reference to the national standard instrument 7.2.1 General description 7.2.2 Preparation of the test samples
13	7.2.3 Use of the referenced test samples 7.2.4 Interpretation of the results 7.2.5 Adjustment of the secondary standard instrument 7.3 Verification of instruments in operation 7.3.1 General description
14	7.3.2 Preparation of the control test samples 7.3.3 Use of the referenced test samples 7.3.4 Interpretation of the results
15	7.3.5 Adjustment of the instrument 8 Monitoring of instrument performance
16	9 Test reports 9.1 Analysis certificate 9.2 Conformity certificate 10 Identification of traced measuring instruments
17	Annex A (normative) Method for calculation of performance parameters of standard instruments and of measurement instruments
28	Annex B (informative) Example — Owners of certified standard measurement instruments
29	Bibliography

Additional information

Status	Under Review
Pages	30
Publication Date	2019-03-12
ISBN	978 0 580 94878 7
Standard Number	BS EN ISO 7971-2:2019
Title	Cereals. Determination of bulk density, called mass per hectolitre – Method of traceability for measuring instruments through reference to the international standard instrument
Identical National Standard Of	ISO 7971-2:2019, EN ISO 7971-2:2019
Replaces	BS EN ISO 7971-2:2009
Descriptors	Density measurement, Agricultural products, Measurement, Calibration, Measuring instruments, Test specimens, Measurement characteristics, Cereals, Crops, Food crops, Test equipment, Bulk density
Publisher	BSI
Committee	AW/4
ICS Codes	67.060 - Cereals, pulses and derived products

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BS EN ISO 7971-2:2019

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