Interlaboratory Evaluation of Smoke Density Chamber. Final Report.
Interlaboratory Evaluation of Smoke Density Chamber.
Lee, T. G.
NBS TN 708; NBS Technical Note 708; 80 p. December
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;
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.]