Abstract: 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 ZRJO03 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 ther moelectric couples have been used with compensation lead in many department of Zhongyuan oilfield.

Key words: cheap metal, short thermoelectric couple, thermoelectricity domino effect, compensation lead, periodic process of examination and determination