Seismic water temperature observation instruments (abbreviated as thermometer) plays a key role in short and imminent earthquake prediction. However, for a long time, there has been a lack of field detection method with quantitative traceability, which is, mobile calibration method. In this paper, two kinds of mobile calibration methods of thermometers, namely in situ comparison method and constant temperature chamber comparison method, are proposed, and the influence of these methods on the continuity of observation data is preliminarily verified by field experiments. The results show that under the conditions of the experimental well, the standard deviations of the observation data of the measured instrument before and after mobile calibration are close, with the maximum difference of -0.0002℃, the maximum difference of the variation amplitude of the indication value of -0.0053℃, and the calculated results of interference degree (ID) of all<50%. The influence of mobile calibration method on instrument data continuity is in the acceptable range. Although the method has some limitations in the scope of application, it is still a potential scheme to realize the traceability of station operating thermometers.

seismic water temperature observation instrument  /  field detection  /  mobile calibration  /  data continuity  /  traceability