chandra.romel@LIGO.ORG - posted 15:49, Thursday 08 March 2018 - last comment - 17:27, Thursday 08 March 2018(40910)
CP4 Dewar economizer valve adjusted
Adjusted CP4 Dewar pressure relief valve (aka economizer valve) by turning screw 2 turns clockwise to increase head pressure. It was at 12 psig with tank 62.1% full. This may help increase GN2 flow. However, the PSI document specifies a head pressure of 5 psig for regen exercise.
It will take a day or so for the head pressure to stabilize to new setting.
Backed off and made it one turn instead on economizer valve.