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Entry  Wed Oct 17 08:04:31 2012, Steve, Update, VAC, Roughing pumps on for oil change 
    Reply  Tue Oct 23 16:18:03 2012, Steve, Update, VAC, Roughing pumps on for oil change oilchange.jpg
Message ID: 7564     Entry time: Wed Oct 17 08:04:31 2012     Reply to this: 7597
Author: Steve 
Type: Update 
Category: VAC 
Subject: Roughing pumps on for oil change 

PR1, PR2 and RP3 turned on for warming up for oil change. Oil changed with 3.2L of  MVT-19 fluid in each. This substitute for HE-175 will be used at the next oil change - it has 1E-6 Torr vapor pressure.

To finish this job tomorrow: 1, check oil creeping upstream  2, change air filter of air purge if pressure drops <350 mTorr  3, measure venting time of pump

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