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Entry  Mon Sep 19 17:02:57 2022, Paco, Summary, General, Power Outage 220916 -- restored all 
    Reply  Tue Sep 20 07:03:04 2022, Paco, Summary, General, Power Outage 220916 -- restored all 
Message ID: 17145     Entry time: Tue Sep 20 07:03:04 2022     In reply to: 17143
Author: Paco 
Type: Summary 
Category: General 
Subject: Power Outage 220916 -- restored all 

[JC, Tega, Paco ]

I would like to mention that during the Vacuum startup, after the AUX pump was turned on, Tega and I were walking away while the pressure decreases. While we were, valves opened on their own. Nobody was near the VAC Desktop during this. I asked Koji if this may be an automatic startup, but he said the valves shouldn't open unless they are explicitely told to do so. Has anyone encountered this before?

Quote:

Restore lab

[Paco, Tega, JC, Yehonathan]

We followed the instructions here. There were no major issues, apart from the fb1 ntp server sync taking long time after rebooting once.

ETMY damping

[Yehonathan, Paco]

We noticed that ETMY had to much RMS motion when the OpLevs were off. We played with it a bit and noticed two things: Cheby4 filter was on for SUS_POS and the limiter on ULCOIL was on at 0 limit. We turned both off.

We did some damping test and observed that the PIT and YAW motion were overdamped. We tune the gain of the filters in the following way:

SUSSIDE_GAIN 1250->50

SUSPOS_GAIN 200->150

SUSYAW_GAIN 60->30

These action seem to make things better.

 

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