再谈热电偶冷端温度补偿

对热电偶的测量原理、冷端补偿做了详细的论述。经过推论说明在热电偶回路中接入第三种金属导线时，只要两端的温度相同对热电偶所产生的热电势数值并不影响热电偶的测量结果。基于这个原理经过合理的接线既能消除安装过程中所出现的新的冷端产生的误差，又能达到同步跟踪补偿冷端温度，保证温度指示准确无误，减少投资提高效率。

Discuss compensation of cold site temperature of hot electric dipole

The measure principle of hot electric dipole and compensation of cold site are detailedly discussed.Through infering,we can explain that it doesn't effect hot electric dipole's measure result if only two site temperature is identrical when connected with the third metal wire in hot electric dipole return circuit.On the basis of principle through rational connecting wire,we can eliminate the new cold error appearing in the installation and synchronous track and compensation of cold site temperature,gurantee temperature index accurate and reduce invest ment and raise efficiency.