In this test method, a specimen is burned in a sealed chamber so that smoke density can be calculated by measuring light attenuation. As such, it is critical that the chamber be airtight. The standard states in more than one section that the chamber must be sealed, and it must be capable of maintaining positive pressure during the test. However, it does not prescribe a leakage test prior to the test. This ballot would add a section detailing a leakage test required in ISO 5659-2, a similar test using the same chamber. This leakage test is already routinely performed by many labs running E662.
fire; fire-test response standard; smoke; smoke chamber; smoke density; smoke obscuration; solids; specific optical density ;
Citing ASTM Standards
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