The principle and software of the auto zero point adjustment circuit in VS tiltmeter are described.
The working status of vertical pendulum tiltmeter in Yanshou Seismostation of Harbin is introduced, and several earthquake strain steps recorded by the instrument are presented.
This article analyzes two years' observational data of CZB-2 tiltmeter of Huainan station, gives out the instrument' s earthquake reflecting ability;
The drift of CZB-1 tiltmeter at Lanzhou Observatory is analyzed and studied in this paper. According to the drift tendency of daily mean values curve, the drift phenomena could be eliminated.
