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Entry  Thu Nov 29 17:46:43 2018, gautam, Update, General, Some to-dos 
    Reply  Fri Nov 30 15:53:52 2018, Jon, Omnistructure, General, N2 pressure gauge fix N2_transducer_datasheet.pdf
       Reply  Tue Dec 4 18:24:05 2018, gautam, Omnistructure, General, N2 line disconnected IMG_7195.JPG
          Reply  Thu Dec 6 17:33:33 2018, Jon, Omnistructure, General, N2 line disconnected 
Message ID: 14331     Entry time: Tue Dec 4 18:24:05 2018     In reply to: 14325     Reply to this: 14333
Author: gautam 
Type: Omnistructure 
Category: General 
Subject: N2 line disconnected 

[jon, gautam]

In the latest installment in this puzzler: turns out that maybe the trend of the "N2 pressure" channel increasing over the ~3 day timescale it takes a cylinder of N2 to run out is real, and is a feature of the way our two N2 cylinder lines/regulators are setup (for the automatic switching between cylinders when one runs out). In order to test this hypothesis, we'd like to have the line pressure be 0 initially, and then just have 1 cylinder hooked up. When we went into the drill-press area, we heard a hiss, turns out that one of the cylinders is leaking (to be fair, this was labelled, but i thought it isn't great to have a higher N2 concentration in an enclosed space). Since we don't need any actuation ability, I valved off the leaky cylinder, and disconnected the other properly functioning one. Attachment #1 shows the current state.

Attachment 1: IMG_7195.JPG  1.645 MB  | Hide | Hide all
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