Wu Yanxia 1,2,3) ;Hu Guoqing 2) ;Ma Wugang 2,3) ; and Tan Yechun 2)
1) Institute of Geodesy and Geophysics, Chinese Academy of Sciences, Wuhan 4300772) Institute of Seismology, CEA, Wuhan 4300713) Crustal Movement Laboratory, Wuhan 430071
Abstract：The major incentives of zerodrift of highprecision tiltmeter are analyzed and two kinds of zeroing methods: remotely zeroing and automatically zero of highprecision tiltmeter are introduced. The two circuits for remotely zeroing and automatically zeroing are applied in vertical pendulum tiltmeter to solve the zeroing problems.So the zeroing accuracy reaches 200mV(the range of the instrument is 2000mV).
