Here is a check list for setting up/working with the ground STS2s (or T240)

   Before touching a STS2 the THREE test masses should be locked using the special non-magnetic screw driver, the T240s do not have locks and are more rugged
 
   After you are done mucking with it

   Make sure that it is aligned using the swizzle stick

   Make sure that the instrument is levelled (bubble level on the sensor)

   Make sure that the feet are locked  (unlocked feet are not stable)

   For STS2s unlock the masses using the special screw driver

   Restore the thermal insulation (exactly what we need is not clear, but we know that at least an enclosure is important)

   Zero the mass positions (this happens at the electronics racks) and read mass positions to make sure that it was successful

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  Eventually it is nice to take a transfer function from the ground instrument to a set of ISI platform instrument to check the alignment