BS 6401:1983
Current
The latest, up-to-date edition.
Hardcopy , PDF
English
31-10-1983
Foreword
Committees responsible
Method
1 Scope
2 Definitions
3 Suitability of a material for testing
4 Specimen construction and preparation
5 Apparatus and ancillary equipment
6 Test environment
7 Setting-up and calibration procedures
8 Test procedure
9 Expression of results
10 Test report
Appendices
A Commentary
B Bibliography
Tables
1 Correction factors with neutral density filter
(ND-2) removed
2 Frequency of checks and calibrations
3 Conversion of percentage transmission to specific
optical density
4 Coefficients of variation and relative precisions of
maximum specific optical density with application of
pilot flame
5 Coefficients of variation and relative precisions of
maximum specific optical density without application
of pilot flame
Figures
1 General arrangement of test chamber
2 Plan view of test chamber
3 Chamber pressure relief and manometer
4 Framework for support of furnace and specimen holder
5 Spacing gauge for furnace and specimen alignment
6 Furnace details
7 Radiometer details
8 Specimen holder
9 Burner
10 Photometric system
11 Diagonal survey of irradiance at specimen during
operation at nominal 2.5 W/cm2
12 Maximum specific optical density (Dmax) for spruce
as a function of specimen thickness under non-
flaming conditions
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