Reports until 19:49, Monday 22 April 2019
H1 SQZ (SQZ)
corey.gray@LIGO.ORG - posted 19:49, Monday 22 April 2019 (48678)
Squeezer Unlocked During PEM Injections

(Sheila, Corey)

While I was in the Mechanical Room doing FAMIS tasks and while PEM Injections were ongoing, the Squeezer Unlocked at 0:37utc (5:37pm)....it had been locked since 23:18utc.  I didn't notice this until about 1:06utc & then asked Sheila to take a look.  At 1:09 she requested SQZ_READY_IFO to close the Beam Diverter to preserve the lock...but it had been locked 30min...so she said this step might not have been necessary.

Then requested SQUEEZING, and we were back to squeezing at 1:10utc.

Summary:  Taking the SQZ_MANAGER to SQUEEZING got us back.

Sheila mentioned that the squeezer unlocked due to the TTFFS, and also because OMC_TRANS_RF3_DEMOD_RFMON dropped down to -40 (it should be at -20).  Sheila said she would like to try a fix to address this tomorrow after she thinks about it. 

Sadly, I did not get to grab info from the Log, because we had a lockloss, sorry.