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Reports until 16:45, Monday 12 February 2018
LHO VE
kyle.ryan@LIGO.ORG - posted 16:45, Monday 12 February 2018 - last comment - 20:08, Monday 12 February 2018(40506)
CP4 decommissioning status
see WP #7343 

1630 hrs. local -> Lowered CP4's level via CDS PI control set point to 70% down from 75%.  I expect this new pump level value should be reached prior to my leaving tonight.

Will start tomorrow morning with step 2 of WP #7343 (as step 1 was done this weekend).  Delay is the result of competing employee requirement/task in addition to my desire to complete construction of a relay box that will act as a second interlock and isolate the scroll pump as a function of foreline pressure.  As is, the foreline isolates only at the absence of 120VAC as seen by the scroll pump motor windings (i.e. one layer of protection - prefer two layers).  
Comments related to this report
kyle.ryan@LIGO.ORG - 18:41, Monday 12 February 2018 (40510)
1830 hrs. local -> Lowered CP4 level target down to 65% from 70%
kyle.ryan@LIGO.ORG - 20:08, Monday 12 February 2018 (40511)
2010 hrs. local -> looks stable.  Going home now.
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