磁场对感应式电导率传感器检定过程中的影响初探

针对电导率、温度传感器检定装置--高精度恒温水槽中,由磁耦合搅拌装置所带来的磁场干扰对电磁感应式电导率传感器所产生的影响问题,进行了一系列实验。以加拿大RBR公司生产的RBR XR-620（感应式）CTD传感器为研究对象,以美国SEABIRD公司生产的SBE 37（电极式）CTD传感器为参比对象进行实验。实验分别在采用磁耦合搅拌方式和机械搅拌方式的两台高精度恒温水槽中进行,结果表明两台CTD传感器在正常工作状态下在不同工作环境中给出不同的测定盐度值（由传感器给出的温度值和电导率值计算得出）。因此,实验结果证明由于磁耦合搅拌方式所带来的磁场干扰会对感应式CTD的测定产生影响。

Influence of Magnetic Field on Calibration Process of Inductive Conductivity Sensors

A series of experiments were carried out to study the effect of the magnetic interference which from the magnetically-coupled stirring to the electromagnetic induction-type conductivity meter in the routine conductivity, temperature and depth (CTD) calibration. RBR XR-620 (electromagnetic induction-type) and SBE 37 (electrode type) were selected as model in the investigation. All the experiments were carried out in two thermostatic baths for contrasting with each other, one of the thermostatic baths using magnetically-coupled stirring apparatus and the other using mechanical stirring apparatus. The results show that the magnetic filed indeed has an inference to the electromagnetic induction-type conductivity meter.