Cone Calorimeter ASTM E1354, ISO

This is a much more complex test than those described previously, and is thought to come closer to real fire conditions. The method is based on what is known as oxygen depletion (or consumption) calorimetry. The development of the method has been 

It has been found empirically that the amount of heat produced during combustion of most types of material is equal to 13.1 MJ for each kg of oxygen consumed from air. The rate of heat release can thus be determined from the rate at which oxygen is consumed. This allows heat release to be followed under typical combustion conditions, rather than in some artificial set-up. 

Time to ignition Peak heat release rate Time to peak heat release Total heat release Peak smoke production rate Time to peak smoke production Total smoke production Fire growth rate index (FIGRA) 

FIGRA is now believed to be one of the most relevant parameters and is related to the size and growth rate of a fire. FIGRA is calculated from the peak heat release rate divided by the time to peak. Similarly, SMOGRA is the peak smoke production rate divided by the time to peak. 

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