The field tests compiled here are designed to detect the presence of the subtle as well as the obvious equipment troubles. Auxiliary test equipment used includes a low distortion sine wave oscillator, oscilloscope, geophone shaketable, and a timing standard as well as the usual voltmeter, ammeters, and ohmmeters which are often built in the equipment. Field test procedures on geophones, cables, seismic amplifier, seismic oscilloscope cameras, magnetic seismic recorders are included. The time lapse between each test is considered, but some flexibility in this respect is recognized, depending on the specific equipment used and the operating conditions.

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