METHOD OF ACQUIRING CALIBRATION STRAIGHT LINE FOR FINDING SPECIFIC HEAT AT DESIRED TEMPERATURE, AND SPECIFIC HEAT MEASURING INSTRUMENT

摘要

PROBLEM TO BE SOLVED: To provide a method of acquiring a calibration straight line and a specific heat measuring instrument in the specific heat measurement, which reduce the number of reference samples required when measuring specific heat, and find the accurate specific heat in an optional temperature.;SOLUTION: This method/instrument finds a thermal time constant and density of the first sample of which the specific heat at the first temperature is known, and a thermal time constant and density of the second sample of which the specific heat at the first temperature is known. The first calibration straight line L₁ indicating a relation between density×specific heat at the first temperature and the thermal time constant, from values thereof is found, and the first intercept value indicating a value of density×specific heat when the heated time constant is set to zero, is computed in the first calibration straight line L₁. Then, the calibration straight line L₂ at the desired temperature is found on the basis of density and a heated time constant of the third sample of which the specific heat at the desired temperature is known, and of the first intercept value. The calibration straight line L₂ at the desired temperature may be found using a correction value executed with prescribed temperature compensation, instead of the first intercept value, as needed.;COPYRIGHT: (C)2006,JPO&NCIPI