Status display for seismometer-group recorder operations

摘要

Seismometer group recorders amplify and make reproducible recordings of one or more seismometers employed in geophysical prospecting. There is no recording of the various groups at the controller instrument truck, as is common in the prior art. The operator needs assurance prior to collecting data through such recorders that the selectively activated group recorders (always considerably less than the total number placed in the field) are ready for the recording. This disclosure describes means for accomplishing such a status display which identifies those group recorders which have been turned on by the radio transmission system or equivalent, verifying that as to each recorder there is available recording medium, proper switching on of the power source, etc.