Guralp Systems CMG-6TD User Manual

Page 22

Installing the 6TD

5. The top panel of the 6TD includes a spirit level.

Level the sensor using each of the adjustable feet of the instrument in

turn, until the bubble in the spirit level lies entirely within the inner
circle. (The instrument can operate with up to 2 ° of tilt, but with

reduced performance.)

The feet are mounted on screw threads. To adjust the height of a foot,

turn the brass locking nut anticlockwise to loosen it, and rotate the foot
so that it screws either in or out. When you are happy with the height,

tighten the brass locking nut clockwise to secure the foot.

When locked, the nut should be at the bottom of its travel for optimal

noise performance.

6. Connect a 12 V fused power supply to the breakout box.

7. Connect the data cable to a PC. Run Scream!, and check that data are

being produced. Optionally, also check the mass position outputs
(streams ending M8, M9 and MA). These streams are digitized at a slower

rate, and may take up to 15 minutes to appear.