... GPS longitude, GPS elevation, voltage before lithium cell, voltage after lithium cell, sampling point data.21Length of Data File Name, 8-Bit: ... for clearing data on FD card26 Built-in Geophone: 2Hz Ground Three-Component Geophone, Qty: 127 Under-voltage Indication ... Function DZS-1 3D Data Acquisition Utilizes Explosion And Huge Seismic Wave ...