- Author
- Lee, T. G.
- Title
- Interlaboratory Evaluation of Smoke Density Chamber. Final Report.
- Coporate
- National Bureau of Standards, Gaithersburg, MD
- Report
- NBS TN 708; NBS Technical Note 708, December 1971, 80 p.
- Distribution
- Available from Government Printing Office Available from National Technical Information Service
- Keywords
- building materials | fire tests | optical density | smoke | smoke density chambers | statistical analysis | ASTM E662 | interlaboratory evaluation
- Abstract
- Results are reported of an interlaboratory (round-robin) evaluation of the smoke density chamber method for measuring the smoke generated by solid materials in fire. A statistical analysis of the results from 10 material-condition combinations and 18 laboratories is presented. For the materials tested, the median coefficient of variation of reproducibility was 7.2% under non-flaming exposure conditions and 13% under flaming exposure conditions. A discussion of errors and recommendations for improved procedures based on user experience is given. A tentative test method description is included as an appendix. [ASTM E662 now incorporates the essence of this work and interested parties should review both documents.]