40m QIL Cryo_Lab CTN SUS_Lab TCS_Lab OMC_Lab CRIME_Lab FEA ENG_Labs OptContFac Mariner WBEEShop
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Entry  Mon Aug 15 10:27:56 2022, Koji, Update, General, Recap of the additional measures for the outage prep PXL_20220812_234438097.jpgPXL_20220812_234655309.jpgPXL_20220812_234748559.jpgrn_image_picker_lib_temp_b5f3e38d-796c-4816-bc0e-b11ba3316cbe.jpgPXL_20220812_235429314.jpg
    Reply  Mon Aug 15 15:43:49 2022, Anchal, Update, General, Complete power shutdown and startup documentation 
       Reply  Mon Aug 15 18:06:07 2022, Anchal, Update, General, c1vac issues, 1 pressure gauge died 
          Reply  Mon Aug 15 20:09:18 2022, Koji, Update, General, c1vac issues, 1 pressure gauge died 
             Reply  Wed Aug 17 10:23:05 2022, Tega, Update, General, c1vac issues, pressure gauge replacement 
Message ID: 17081     Entry time: Mon Aug 15 18:06:07 2022     In reply to: 17080     Reply to this: 17082
Author: Anchal 
Type: Update 
Category: General 
Subject: c1vac issues, 1 pressure gauge died 

[Anchal, Paco, Tega]


Disk full issue:

c1vac was showing /var disk to be full. We moved all gunzipped backup logs to /home/controls/logBackUp. This emptied 36% of space on /var. Ideally, we need not log so much. Some solution needs to be found for reducing these log sizes or monitoring them for smart handling.


Pressure sensor malfunctioning:

We were unable to opel the PSL shuttter, due to the interlock with C1:Vac-P1a_pressure. We found that C1:Vac-P1a_pressure is not being written by serial_MKS937a service on c1vac. The issue was the the sensor itself has become bad and needs to be replaced. We believe that "L 0E-04" in the status (C1:Vac-P1a_status) message indicates a malfunctioning sensor.

Quick fix:

We removed writing of C1:Vac-P1a_pressure and C1:Vac-P1a_status from MKS937a and mvoed them to XGS600 which is using the sensor 1 from main volume. See this commit.

Now we are able to open PSL shutter. The sensor should be replaced ASAP and this commit can be reverted then.

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