介绍了 PARR 1 2 81型热量计结构、操作方法及性能 ,重点阐述了对该热量计的性能检验方法及结果 ,检验结果表明该热量计的绝对精度小于 40 J/ K,相对精度小于 0 .2 % ,符合国家计量检定规程要求。该仪器的准确度也符合要求 ,说明热量计的性能良好 The structure, operating method and performance of the PARR 1 2 81 calorimeter are introduced. The performance testing methods and results of the calorimeter are emphatically described. The test results show that the absolute accuracy of the calorimeter is less than 40 J / K and the relative accuracy is less than zero. 2%, in line with the national measurement test requirements. The accuracy of the instrument also meets the requirements, indicating that the calorimeter’s performance is good