Glossary

Heat-Wait-Search (HWS)

Heat-Wait-Search is a measurement mode used in calorimeter devices according to accelerating rate calorimetry (Accelerating Rate Calorimetry (ARC)The method describing isothermal and adiabatic test procedures used to detect thermally exothermic decomposition reactions.ARC^®).

HWS is the term for a sequence that heats the sample to a distinct temperature (heat), allows thermal stabilization of the system (wait) and finally detects (search) if there is an increase in the sample temperature detected which is caused by the ExothermicA sample transition or a reaction is exothermic if heat is generated.exothermic Decomposition reactionA decomposition reaction is a thermally induced reaction of a chemical compound forming solid and/or gaseous products. decomposition reaction of the sample. In case an exothermic self-heating is detected, the calorimeter device changes its mode from HWS to AdiabaticAdiabatic describes a system or measurement mode without any heat exchange with the surroundings. This mode can be realized using a calorimeter device according to the method of accelerating rate calorimetry (ARC). The main purpose of such a device is to study scenarios and thermal runaway reactions. A short description of the adiabatic mode is “no heat in – no heat out”.adiabatic.