Non-adiabatic screening tests

Non-adiabatic screening tests such as Carius tube111 and the Accelerating Rate Calorimeter (ARC ), corrected for sample heat losses due to thermal inertia, can also be used for screening. If it is known that the reaction is a vapour pressure system, DSC may be used. 

However, it must be recognised that these maximum rates will be underestimates due to the heat losses from thej sample in the tests. Careful interpretation is needed when using such non-adiabatic screening tests to find the worst case, and this is best done by skilled and experienced analysts. In addition, for gas-generating systems, it may be difficult to contain the peak pressure using a screening test such as the Carius tube. The use of an adiabatic screening test (see 3.5.3 below) may therefore be preferred. - ... 

Non-adiabatic screening tests can be used to narrow down the range of relief scenarios which may be the worst case, but in many cases two or three possibilities may still remain. ... 

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