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Reports until 14:17, Saturday 09 January 2016
LHO VE
kyle.ryan@LIGO.ORG - posted 14:17, Saturday 09 January 2016 (24808)
Manual over fill of CP3
~1315 - 1355 hrs. local 

LN2 observed at GN2 exhaust after only 4 minutes -> Considering the exact procedure was followed as was during the previous manual over fill (2 days ago) and that then it had taken 29 1/2 minutes for LN2 to be observed at the GN2 exhaust, this demonstrates that opening the LLCV bypass valve 1/2 turn ccw is insufficient -> As such, from now on we should use 1+ full turn ccw (exhaust check valve bypass assumed to always be opened before LLCV bypass is opened) -> Today's data supports the choice of using 15% open for the LLCV, which was based upon the historical average needed to maintain the proper pump level- meaning that the pump level decays only slowly over the course of days if reliant only on the filling that occurs via the 15% open LLCV 

Next scheduled manual over fill of CP3 will be Monday, Jan. 11th before 4:00 pm
Displaying report 1-1 of 1.