Interlock closed valve V1, V4, V5 and VM1 when the nitrogen supply run out. The IFO pressure rose to P1 1 mTorr
In order to recover Vacuum Normal valve configuration I did the following:
Replaced both nitrogen cylinders. Confirmed pneumatic nitrogen pressure 70 PSI. Opened valves V4 and V5
At P2 < 1 mTorr, Maglev rotation 560 Hz , V1 was opened.
VM1 was opened when CC1 pressure dropped below < 1e-5 torr
Please take a look at the N2 cylinders pressure on Friday to insure that there is enough for the week end.
The daily consumption is 600-700 PSI