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 Micro Scale Calorimeter  (PCFC) ASTM D-7309
 Ministry of Defence/  DEFSTAN

No: 2294


Micro Scale Calorimeter (PCFC) ASTM D-7309

Interscience Fire Laboratory provides quality testing from its UKAS approved Gosport laboratory

This technique enables parameters such as Specific Heat Release Rate (W/g), Heat of Combustion (J/g) and Ignition Temperature (°K) to be quickly determined from very small (1-50mg) specimens.

The UL 94 and the LOI are the two tests that have traditionally been used by the plastics industry to define flammability or resistance to ignition by flames. Three ranges of materials flammability are typically identified and can be determined by comparing Heat Release Capacity (HRC) with results from the standard UL94 flammability tests and LOI. These are:

Materials with an HRC above 400 J/g-K will continue to burn after exposure to the UL94 (Bunsen) flame .The materials commonly show LOI values of less than 21%.

Materials with Heat Release Capacities between 200 and 400 J/g-K burn slowly or not at all, when exposed to the small flames as indicated by UL94 V ratings and LOI above 21%.

Materials with Heat Release Capacities below 200 J/g-K do not ignite after brief exposure to small flames (UL94) and have LOI > 35%.
Expertise has been developed with specification committee representation, the use of a wide range of international standards and specialist analytical techniques in a fully equipped laboratory.
The test facilities based at Haslar enable materials to be evaluated quickly for smoke, toxic gas production, flame spread, heat release and many other fire related parameters.

Additional capabilities include:
• Gas analysis including FTIR spectroscopy
• Cable testing to BS, EN, IEC and ISO standards
• Railway testing to EN 45545-2, BS 6853, and LUL requirements
• UK MoD fire test requirements


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