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Reports until 17:11, Tuesday 04 February 2014
H1 SEI
hugh.radkins@LIGO.ORG - posted 17:11, Tuesday 04 February 2014 - last comment - 18:18, Tuesday 04 February 2014(9820)
WBSC2 BS HEPI V2 Parker Valve Replaced, now in Run Mode

About 1435pst, the BS V2 HEPI Actuator was put back into run mode with a new, no leak, Parker Valve.  I see no jostle on the pressure trends so the other HEPIs are likely very minimally effected.

Valve L071 was replaced by L170.

When I look at the trends I see that the BS position sensor loops have been off quite a bit over the past many days.  Remember the RX & RY will not move to their targets if greater than 500 nrads; so, please check if your alignment seems iffy. 

See the attached, notice that for most of this 30 day plot the trends are very flat, this is the position loops holding location.  Notice though that over about the last ten days, RX & RY spend more time than the other dofs at a different location aand not trending perfectly flat, evidence that the HEPI 'free' position is too far from the target and it won't load the target for those dofs.

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Comments related to this report
hugh.radkins@LIGO.ORG - 18:18, Tuesday 04 February 2014 (9823)

Wrong log to comment, lost my intended.

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