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Entry  Wed Sep 16 12:03:07 2020, Jon, Update, VAC, Replacing pressure gauges vac_gauges.png
    Reply  Wed Dec 2 12:27:49 2020, Jon, Update, VAC, Replacing pressure gauges 
       Reply  Thu Dec 3 14:53:58 2020, Jon, Update, VAC, Replacing pressure gauges 
Message ID: 15703     Entry time: Thu Dec 3 14:53:58 2020     In reply to: 15692
Author: Jon 
Type: Update 
Category: VAC 
Subject: Replacing pressure gauges 

Update to the gauge replacement plan (15692), based on Jordan's walk-through today. He confirmed:

  • All of the gauges being replaced are mounted via 2.75" ConFlat flange. The new FRGs have the same footprint, so no adapters are required.
  • The longest Agilent cable (50 ft) will NOT reach the CCMC location. The fifth FRG will have to be installed somewhere closer to the X-end.

Based on this info (and also info from Gautam that the PAN gauge is still working), I've updated the plan as follows. In summary, I now propose we install the fifth FRG in the TP1 foreline (PTP1 location) and leave P2 and P3 where they are, as they are no longer needed elsewhere. Any comments on this plan? I plan to order all the necessary gaskets, blanks, etc. tomorrow.

Volume Sensor Location Status Proposed Action
Main P1a functioning leave
Main P1b local readback only leave
Main CC1 dead replace with FRG
Main CCMC dead remove; cap with 2.75" CF blank
Pumpspool PTP1 dead replace with FRG
Pumpspool P2 functioning leave
Pumpspool CC2 dead replace with FRG
Pumpspool PTP2 functioning leave
Pumpspool P3 functioning leave
Pumpspool CC3 dead replace with FRG
Pumpspool PTP3 functioning leave
Pumpspool PRP functioning leave
RGA P4 functioning leave
RGA CC4 dead replace with FRG
RGA IG1 dead remove; cap with 2.75" CF blank
Annuli PAN functioning leave
Annuli PASE functioning leave
Annuli PASV functioning leave
Annuli PABS functioning leave
Annuli PAEV functioning leave
Annuli PAEE functioning leave
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