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丹江口水利枢纽从１９５９年起开始埋设内部观测仪器共２２００多支，多年来在提高内部观测精度方面做了一些探索，积累了一些经验。首先是进行仪器鉴定，通过对仪器鉴定，对仪器进行分类，了解仪器工作是否正常，测值是否可靠，以减少不可靠的测值造成计算错误。另外采用改型的精度较高的ＳＢＱ—４型水工比例电桥，并把它们作为内部仪器的接收设备，以提高观测成果质量。再者选用芯线铜丝镀锡电缆，以使测值稳定。以上的措施，有利于提高内部观测的精度
Danjiangkou Water Conservancy has embarked on over 2,200 internal observation instruments since 1959. Over the years, it has made some exploration and accumulated some experiences in improving the internal observation precision. The first is to identify the instrument, through the identification of the instrument, the instrument classification, to understand the instrument work is normal, the measured value is reliable, in order to reduce the unreliable measurement results in calculation error. In addition, the modified SBQ-4 hydraulic proportional bridge with higher accuracy is adopted as the receiving device of the internal instrument so as to improve the quality of the observation results. Furthermore, select the core wire copper tin-plated cable, so that the measured value is stable. The above measures are conducive to improving the accuracy of internal observations