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Entry  Wed Jun 30 15:31:35 2021, Anchal, Summary, Optical Levers, Centered optical levers on ITMY, BS, PRM and ETMY 
    Reply  Thu Jul 1 16:55:21 2021, Anchal, Summary, Optical Levers, Fixed Centeringoptical levers PRM 
Message ID: 16231     Entry time: Wed Jun 30 15:31:35 2021     Reply to this: 16236
Author: Anchal 
Type: Summary 
Category: Optical Levers 
Subject: Centered optical levers on ITMY, BS, PRM and ETMY 

When both arms were locked, we found that ITMY optical lever was very off-center. This seems to have happened after the c1susaux rebooting we did in June 17th. I opened the ITMY table and realigned the OPLev beam to the center when the arm was locked. I repeated this process for BS, PRM and ETMY. I did PRM because I've known that we have been keeping its OpLev off. The reason was clear once I opened the table. The oplev reflection beam was hitting the PD box instead of the PD. After correcting, I was able to swithc on PRM opLev loops and saw normal functioning.

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