... performance of a quenchant-as a result, for example, of degradation or impurity –over a period of time2,Laboratory measurement3,Tests of different ... polymers, water and salt4,Incoming inspection of quenchantsMode of operationA probe containing a thermocouple is heated to the required temperature ... ,60s,120s,240s,480s,960s,1920s-Show temperature/time and temperature/cooling rate curves-Plot curves with ...