Reports until 09:58, Monday 13 April 2015
H1 SEI (ISC)
hugh.radkins@LIGO.ORG - posted 09:58, Monday 13 April 2015 (17838)
WHAM ISI Isolation Target Positions adjusted, again

Investigating the trip on WHAM6 CPS, Friday night.  Mirky for now.  See the output drives fairly high (solid 100s touching 1000 on OUTF mons) with saturaions totalized over the weekend.  Cleared these and saw a few more shortly.

Took ISI and HEPI down to review free hanging position.  HEPI Deltas (Free Hang-Servo position) pretty small except Rz w/ ~24urads.  The ISI too had a larger than we left it Friday shift in Rz.  Of course, HEPI Rz can not affect ISI Rz.  The ISI Rz shifted about 9urads from Friday.  Recall, on Friday we had 70urad shift on Rx.  Maybe further temperature and pressure shifts are settling out.  The Reference Target Positions were reset to match the free hanging location.  The loops close fine and the OUTF drives are as expected, markedly smaller.

If alignment in HAM6 is an issue, use HEPI first for horizontal changes to keep the ISI drive reduced.