See 33648 for previous work.  Basics--There is an STS2 seismometer piggy backed with the BRS.  It however, exibited some noise and I found it mis-centered last week.  Despite many centering attempts last week I could not get it to center the masses in an expected timely nature.  After this work, there appeared a glitching behaviour.  On Thursday, I checked and found the masses with the same voltage reading and all the other bad things persisted.  I hit the mass center button and walked away.  After this, the X Y Z signals suggested that the masses were now better positioned but the glitching behaviour remained.

This morning when we arrived, the mass positions where much closer to okay than they ever had been:  0.1 -2.2 and 5.5V for U V W. Jim checked the feet for tightness and found them secure.  First thing was to power cycle the system to see if I could clear the glitches.  After the power cycle, the mass positions weren't any better but not too much worse.  Three mass centerings left the positions in an okay place: -.3 -.5 & -1.6V. Steckeisen recommends <2.0volts is acceptable.

Sadly though, it still appears to have positive going glitches and early looks at the spectrum suggest the glitches are still there.  Also, since we spent a few hours in the BRS box, we may now be in a thermal instability that we must wait out. We could end up out of position after the temperature stabilizes but this can be corrected with another mass centering when possible; but, the glitches are another thing.  Might have to attempt another power cycle if they continue.

I'll post data later after  things settle.