ITF found in Science mode.
It unlocked at 21:13:59 UTC and the problem seems to be due to missing data for all the ISYS signals, see plot1.
It relocked at second attempt, Science mode at 22:50 UTC.
Guard tours (times in UTC)
Air Conditioning
In the second plot you can see a trend of some relevant signals affected by the problem on the air conditioning machine occurred Friday night.
Follow-up of recovery after the HVAC failure:
Room temperature in the laser lab (and hosted benches) still experiencing the tail of a long transient. BPC horizontal corrections slowly drifting to compensate for the beam drifting on the sensors (not worrying, to be monitored). PMC seems to experience a little misalignment (Laser Amplifier power slightly increasing while PMC transmission is getting slightly worse), although from the reflected power the behavior is not vey clear. To monitor a possible increase of glitches related to the PSTAB if the misalignment of the PMC gets worse.
Overall input power for the interferometer decresed by 2%, to be re-checked after the steady state of the temperature is achieved.
For the moment, no urgent actions are needed from ISYS point of view, situation still under monitoring.
