aLIGO LHO Logbook

LHO VE

chandra.romel@LIGO.ORG - posted 17:52, Wednesday 20 April 2016 - last comment - 02:43, Thursday 21 April 2016(26701)

CP6 below 100% full

After 15 hrs, CP6 finally registers a real value on the liquid level read back. Currently at 98.5%. I opened the Dewar valve and set the LLCV to 55% (normally runs between 60-65%). I'll be here for a while working on CAD drawings so I'll monitor it.

Comments related to this report

chandra.romel@LIGO.ORG - 18:14, Wednesday 20 April 2016 (26702)

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Magnehelic reads a hair over 40 in. H20 (maybe 40.4?) when liquid level reads back 97.8%. Ratios match what we expect!

chandra.romel@LIGO.ORG - 18:16, Wednesday 20 April 2016 (26704)

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Raised LLCV to 57%.

chandra.romel@LIGO.ORG - 21:32, Wednesday 20 April 2016 (26707)

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Raised level to 60% valve open (liquid level reads 85.7%).

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chandra.romel@LIGO.ORG - 23:42, Wednesday 20 April 2016 (26710)

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I was going to manually fill CP6 a bit before I left, but the bypass valve is frozen shut. Liquid level is 80.5% in the red, but LLCV is set to its normal value of 60%. Should be good and ready for some Beckhoff PID action in the morning.

kyle.ryan@LIGO.ORG - 02:43, Thursday 21 April 2016 (26711)

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75% @ 0240 hrs. local