Reports until 16:50, Saturday 24 June 2023
H1 PSL
austin.jennings@LIGO.ORG - posted 16:50, Saturday 24 June 2023 - last comment - 20:46, Saturday 24 June 2023(70791)
PSL ISS 2nd Loop Servo Adjustment

Following the recent lockloss, I have followed Ryan S. instructions to try and get the slow offset servo (H1:PSL-ISS_SECONDLOOP_REFERENCE_SERVO_OUT16) to 0. I tried to do this by adjusting the H1:PSL-ISS_THIRDLOOP_OUTPUT_OFFSET. I first tried offsetting the servo value, the servo was at -322, so I set the output to +322, which made the servo value worse. I then tried going in the positive direction which seemed to have made it better. After doing some back and forth moving the output, I was finally able to get the servo to ~-0.3 by setting the output to 949 - screenshot attached. I then cleared the history on the servo overview. Just in case we need to revert later, the original value for the output was +1272.

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austin.jennings@LIGO.ORG - 20:46, Saturday 24 June 2023 (70796)

Value changed showed as a SDF diff for the OBSERVE snaps. Screenshotting and accepting.

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