Guralp Systems CMG-3TB - Manual (Page 33)

Operator's guide
5. Attach the lifting loop to the sensor using four M5×16 screws
(provided).
6. Join the loop to the bottom of the strain relief mechanism using
the linking cable provided.
7. Hoist up the sensor package and strain relief mechanism until
both are hanging by the lifting cable, with the strain relief
mechanism extended. Tighten the cable clamps on the strain
relief unit, allowing a little slack in the signal cable.
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