BS 7590:1992
Current
The latest, up-to-date edition.
Hardcopy , PDF
English
10-15-1992
Committees responsible
Foreword
Method
1 Scope
2 Informative references
3 Principle
4 Symbols
5 Apparatus
6 Test samples
7 Procedure
8 Calculation of the volume fraction of alpha-phase
Vv, the 95 % confidence interval CI and the
relative error
9 Improving the volume fraction estimate
10 Test report
Annex
A (informative) Worksheet for the determination of
volume fraction by systematic manual point count
Tables
1 Guidelines for grid size selection (total number of
points on a grid) for visually estimated area
fractions
2 Number of fields (n) for a relative error of 33 %
for a given volume fraction and grid size
3 Number of fields (n) for a relative error of 20 %
for a given volume fraction and grid size
4 Number of fields (n) for a relative error of 10 %
for a given volume fraction and grid size
5 Number of fields (n) for a relative error of 5 %
for a given volume fraction and grid size
6 Multipliers for calculation of 95 % confidence
interval
Figures
1 Examples of circular grid configurations
2 Examples of square grid configurations
List of references
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