Standard: ASTM E662 - Standard Test Method for Specific Optical Density of Smoke Generated by Solid Materials

Certification Required: N/A

Scope: Per ASTM E662: "This fire-test-response standard covers determination of the specific optical density of smoke generated by solid materials and assemblies mounted in the vertical position in thicknesses up to and including 1 in. (25.4mm)."

Applicable Products: Solid materials

Test Procedure: The test apparatus is allowed to reach steady-state conditions. The exhaust vent and blower are closed and the specimen is pushed into the furnace. The chamber door is closed and the timer is started. The light transmittance and time are recorded. The increase in chamber pressure is observed with a manometer and a regulator is used to maintain the pressure. Any observations relating to the burning and smoke generating properties of the test material are recorded. The test is continued for 3 minutes after the minimum light transmittance value is reached or after an exposure of 20 minutes depending on what occurs first. The burner is then extinguished and the chamber is exhausted until the maximum transmittance is reached. This transmittance is recorded as the "clear beam" reading.

End Result: This test results in the observed behavior of the specimen during exposure, a tabulation of time vs. transmittance, the average and range of the optical density.

Special Notes: N/A

Intertek Testing Locations: Middleton, WI


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