1. Apparatus for testing the polarity of a geophone having a top and a bottom comprising:
- means for measuring the response of a geophone to an applied electrical stimulus and a mechanical impulse to the top or the bottom of the geophone;
- means, coupled to said means for measuring and to a means for controlling the display of a waveform representation of geophone response data, for timing the measurement and display of geophone response data;
- means, coupled to said means for measuring, for storing geophone response data for the extruded or delayed display thereof;
- a waveform display coupled to said means for storing;
- means for adjusting a left to right spread; and
- means for adjusting an amplitude operably connected to said waveform display, so that it can be determined whether the displayed waveform has a first break that is negative going or is positive going.
2. A method for testing the polarity of a geophone comprising the steps of:
- connecting a geophone having a top and a bottom to a geophone tester having a waveform display capable of storing and of extended display of geophone response data; applying a selected electrical stimulus to the geophone;
- applying a mechanical impulse to the top or to the bottom of the geophone;
- displaying a waveform of the response of the geophone to the selected stimulus and impulse; and
- determining whether the displayed waveform has a first break that is negative going or is positive going.
3. The method of claim 2, further comprising the step of comparing the waveform to a representation of a properly operating geophone response waveform.
