Guralp Systems CMG-6TD User Manual

Page 28

Installing the 6TD

5. Carefully insert the instrument into the hole, protected by a tough

plastic bag to keep water out. Use a bag strong enough to bear the

weight of the sensor and breakout box, so that it can be recovered
easily.

6. Press the sensor down firmly into the soil, without tapping or hitting it.

7. Check the bubble level on top of the instrument package.

Adjust the instrument's position if necessary so that the bubble lies
entirely within the black circle.

8. Pack soil or sand around the instrument to hold it steady. Make sure

the soil or sand is firmly compacted and not at all loose.

9. Re-check the bubble level. If you cannot adjust the soil packing at this

stage and the sensor is not level, you will need to clear the hole and

restart from step 3.

10. Place the breakout box and any excess cable on top of the sensor, inside

the plastic bag.

11. Group the cables coming from the bag for a distance of about 1 m, and

keep them together with insulating tape.