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Entry  Tue Jun 29 17:10:49 2010, steve, rana, Update, VAC, slow pumpdown started 
    Reply  Tue Jun 29 23:49:18 2010, steve, rana, Update, VAC, slow pumpdown started Untitled.png
       Reply  Wed Jun 30 00:45:26 2010, rana, Update, VAC, slow pumpdown stopped for the night 
       Reply  Wed Jun 30 15:24:04 2010, steve,kiwamu, Update, VAC, slow pumpdown copmlete slowpd.jpgbutterfly.JPG
Message ID: 3148     Entry time: Wed Jun 30 15:24:04 2010     In reply to: 3140
Author: steve,kiwamu 
Type: Update 
Category: VAC 
Subject: slow pumpdown copmlete 

Quote:

Untitled.png

The pumpdown started at 4 PM (2300 UTC). At 10 PM, we (Jenne, Jan, and I) opened up the RV1 valve to full open. That's the second inflection point in the plot.

 Atm 2 is showing the butterfly valve that closes down down the orifice at higher pressure to slow down the pumping speed.

 See elog entry #2573

 

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