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Interlaboratory Evaluation of Smoke Density Chamber. Final Report.

pdf icon Interlaboratory Evaluation of Smoke Density Chamber. Final Report. (20013 K)
Lee, T. G.

NBS TN 708; NBS Technical Note 708; 80 p. December 1971.

Available from:

National Technical Information Service
Order number: COM-72-500062


building materials; fire tests; optical density; smoke; smoke density chambers; statistical analysis; ASTM E662; interlaboratory evaluation


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.]