Exothermic apparatus, hazard

In addition to the extra hardware required for these experimental runs, the ARC was operated differently than under standard hazard evaluation conditions. Instead of heating, searching and waiting, the samples were heated to a specified temperature and were then maintained isothermally at that temperature for extended periods of time. Pressure and temperature data were then monitored and stored in the microcomputer at a rate of 1 Hz. It should be noted that the apparatus reverts back to normal operation (i.e., tracking an exotherm), if a heat rise rate greater than 0.02 °C/min is detected. 

---