- 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.]