TEMPERATURE-MEASUREMENT AND CONTROL - CRITICAL PARAMETERS IN THERMAL-ANALYSIS TECHNIQUES

Several factors in temperature measurement that can affect the precisi on of melting points and phase-change phenomena are discussed. In many cases, critical errors may arise in the measurement and control of te mperatures due to incorrect placement and/or interpretation of the out put of temperature sensors in the various system types that are in cur rent use. Advantages can be obtained by using one temperature sensor o nly for temperature measurement and temperature control in a low mass infrared gold image furnace for the analytical studies in both the con stant rate and stepwise isothermal thermoanalytical heating and coolin g modes. Illustrations of the use of this instrumentation for measurem ents in both modes are given.