This part of ISO 5660 specifies a method for assessing the heat release rate and dynamic smoke production rate of specimens exposed in the horizontal orientation to controlled levels of irradiance with an external igniter. The heat release rate is determined by measurement of the oxygen consumption derived from the oxygen concentration and the flow rate in the combustion product stream. The time to ignition (sustained flaming) is also measured in this test.

The dynamic smoke production rate is calculated from measurement of the attenuation of a laser light beam by the combustion product stream. Smoke obscuration is recorded for the entire test, regardless of whether the specimen is flaming or not.

Cross References:
ISO 14697
ISO 554
ISO 13943:2017
TR 3814:1989
ASTM E1354-99
TS 14934-1
DIN 50055:1989
ASTM E662
ISO 5725-2:1994
ISO 5725-1:1994
ISO 5725:1986
BS 6809:1987
ISO 5657:1997
ISO 291:1997
BS 7904:1998


Incorporates the following:
Amendment, August 2019