Digital seismic logger "Ermak-5". Five years of development

Abstract

The published data on several well-known seismic recorders used in modern seismological moni-toring systems are considered, and their qualitative comparative analysis is carried out. Infor-mation about the presence of Russian devices of this class in the State Register of measuring in-struments is given. The key technical characteristics of the "Ermak" recorder and confirming the results of laboratory and field experiments are given. At the same time, special attention is paid to the correspondence of the amplitude-frequency characteristics of the recorder to the reference analogs. A brief description of the flexible power management system for the recorder modules, which is designed to reduce power consumption, is given. The minimum value of the power con-sumption is about 300 mW when recording through six channels, which makes it possible to ef-fectively use the device for long-term measurements using autonomous power supplies. The in-ternal clock of the recorder is synchronized using GPS/GLONASS systems (hundreds of nano-seconds) and NTP-services (tens of microseconds). The efficiency of operation is ensured by the presence of a LCD-screen at the logger, on which, in addition to time and parametric information, waveforms are displayed in various display modes. There is also a list of facilities where "Ermak" was tested or is currently being operated.