Guralp-systems CMG-1T Manuel d'utilisateur télécharger pdf (Page 14)

CMG-1T Ocean Bottom Seismometer Operator’s

Guide

Section 2, Page 2 September 1999,

Issue C

The adjustments required for operation consist of levelling the boom of the

vertical sensor and tilting the bases of the horizontal sensors to centre the

movements in their equilibrium positions. These adjustments are made by small

DC motors operating through gear trains to tilt the bases of the horizontal

sensors and to apply a small extra force to the vertical sensor’s boom.

For transportation the masses have to be locked securely in their frames, taking

the strain off the support hinges. The locking is performed by a small motor

driven clamp in response to a control command.

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Guralp-systems CMG-1T Manuel d'utilisateur Page 14