论补偿导线对热电偶检测结果的影响

主要论述了长型热电偶（大于750mm)和短型热电偶（小于或等于750mm）在周期检定过程的不同之处。如果两都用常规的接线方法进行检定，结果会发现短型热电偶比长型热电偶的修正值偏大，从而导致短型热电偶合格率降低。为了在计量测试中保证检测质量，提高检定准确度，采用ZRJ-03型智能热工仪表装置对短型和长型热电偶进行了反复测试、对比试验，发现短型热电偶在检测和工业计量测试中必须加接相应的补偿导线，这样才能保证检测和测试数据真实可靠。补偿导线用于短型热电偶的检定和测试工作已经在于原油田很多单位得到了应用。

Effect of Compensation Lead on the Results of Thermoelectic Couple Examination and Determination

The differences of long and short thermoelectric couples in periodic process of examination and determination were discussed. If both of them were tested by using common linking methods, the revised values of short thermoelectric couple were higher than those of the long thermoelectric couple, it caused that the qualified proportion of short thermoelectric couple was decreased. The long and short thermoelectric couples were measured repeatedly by using ZRJ-03 device. The testing results showed that short thermoelectric couple must be linked with corresponding compensation lead in process of verification and industrial measurement to make the data true. The short thermoelectric couples have been used with compensation lead in many department of Zhongyuan oilfield.