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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: 16236     Entry time: Thu Jul 1 16:55:21 2021     In reply to: 16231
Author: Anchal 
Type: Summary 
Category: Optical Levers 
Subject: Fixed Centeringoptical levers PRM 

This was a mistake. When arms are locked, PRM is misaligned by setting -800 offset in PIT dof of PRM. The oplev is set to function in normal state not this misalgined configuration. I undid my changes today by switching off the offset, realigning the oplev to center and then restoring the single arm locked state. The PRM OpLevs loops are off now.


 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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