10
–8
Minimate Pro Operator Manual
Figure 10.1 Geophone Sensor Operation.
Geophone sensor specifications give a number known as the Intrinsic Voltage Sensitivity. It is the
coil voltage induced for a given coil versus magnet speed with units of V/in/s. In seismic
applications, the magnet is moved by the blast energy because it is coupled to the particles of the
surrounding terrain. The coil, because of its inertia, does not move and the resulting magnet versus
coil motion induces a voltage which is proportional to particle velocity.
b. Geophone Calibration Requirements
Instantel’s
Geophone must be calibrated annually by
Instantel
or an
Authorized
Instantel
Service Facility
. Contact your dealer for further information.
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