Abstract: To meet the the high requirement on reliability of instruments for deep borehole seismic observation. a high reliable seismometer architecture with 6 same tilt suspension transducers is proposed. The reliability of this kind of seismometer is 20 times of a normal one. To take advantage of the 6 component architecture, the state of all the components should be known clearly. A set of methods for examination of consistency of a high reliable 6 component seismometer, includes examination of consistency of up-down waveform, examination of consistency of horizontal waveform, examination of consistency of XYZ output waveform, is given in this paper. The methods are helpful for determination of the state of 6 components, then help to decide which 3 components will be selected to get the best XYZ output waveform, then get the best specification of the high reliable 6 component seismometer.

Key words: High-reliable deep borehole seismometer, Examination of coherence of up-down waveform, Examination of coherence of horizontal waveform, Examination of coherence for XYZ output waveform