john.worden@LIGO.ORG - posted 16:26, Tuesday 21 April 2015 - last comment - 20:37, Tuesday 21 April 2015(17988)
Anticipating possible CP2 low alarm tonight
Entry by Kyle
LLCV % open for CP2 increased by 20% of its traditional output ~ 10 days ago for some reason -> today's delivery resulted in slow response (shouldn't be related) -> xfer line likely will warm up tonight before PID settles -> delivery rate wasn't abnormally short -> uncertain why response is different -> will investigate
This entry by John
This is likely due to the extra draw on the CP2 dewar after connecting all the 3IFO storage containers to N2 purge. The dewar pressure is probably falling but we should be able to reduce the storage purge.
If not we can use the self pressurizing circuit of the dewar to increase the boiloff.