... measurement in other fields.CDJ middle & high frequency geophones, 4,10,15,28,30,40,60,80 or 100Hz, are widely ... -Z2CCDJ-P2CCDJ-S2C VerticalHorizontal3-CVerticalHorizontal3-CNature Frequency Fn (Hz)1±10%2±10%Sensitivity in Open Circuit G (v/cm/s)2 ... /s)1.83±10%2±10%Damp in Open Circuit Bt0.32±10% Damp in Shunt Bt0.43±10%0.7±10%Coil Resistance Rc ...