PZ40型数字地电仪

MODEL PZ40 DIGITAL EARTH-RESISTIVITY EQUIPMENT

摘要:

地电方法测量的物理量实际上是一个直流电压(供电电流也是通过标准电阻转换成电压的)为了提高观测精度,实现地电测量的自动化,67年原兰州地球物理所邢台队试用过直流数字电压表;72年以后兰州地震大队和宁夏地震队先后使用过PZ5型、PZ8型、PZ13型等直流数字电压表,这些仪器在地电测量中往往因为抑制不住外来的干扰而使仪器的精度大大降低甚至不能正常工作。73年昆明地震大队、74年兰州地震大队先后都试制成数字式的地电仪。

Abstract:

Model PZ40 digital earth-resistivity equipment is a new automatic eq-uipment for the measurement of the earth-resistivity.
The present article emphatically elucidates the main techniques for improving accuracy and restraining interfere,and introduces the gen-eral usage of the equipment,its main technical indications,its princi-ples of work and its effects for use,etc.