BS 6199-1.2:1991

Committees responsible
National foreword
Methods
Introduction
1. Scope
2. Normative references
3. Definitions and symbols
4. Certification
5. General principles
6. Procedures for checking operations
7. Calculation of the overall uncertainty
Annexes
A. Estimation of systematic and random errors
     introduced by the weighing device
B. Study of diverter operation
C. Assessment of flowrate stability within the
     integration interval
D. Assessment of flowrate stability between
     integration intervals
E. Study of flow characteristics
F. Bibliography
Tables
1. Symbols
2. Student's t distribution for various degrees of
     freedom and 95% confidence level
A.1 Values of s delta m as a function of (m + Ro)
A.2 Example of measurement results of a weighing device
     test
B.1 Results of switching time difference tests for the
     diverter
C.1 Results of flow stability test during the
     integration interval
D.1 Values of A (Abbe criterion)
D.2 Results of flow stability tests between integration
Figures
B.1 Graph of the filling process for the measuring tank
B.2 Diagram of measurement of switching time and
     switching time difference of the diverter

Describes methods of testing installations for flowrate measurement by the static weighing method. Covers definitions and symbols, certification, general principles, procedures for checking operations and calculation of the overall uncertainty. Includes several appendices and tables.

This part of ISO 9368 specifies methods of testing installations for flowrate measurement by the static weighing method. Methods of testing by dynamic weighing are given in ISO 9368-2.