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Entry  Thu Feb 18 15:39:16 2010, Koji and Steve, Configuration, VAC, valve condition: ALL OFF 
    Reply  Tue Feb 23 16:20:44 2010, steve, Configuration, VAC, outgassing + leak outgleak.jpg
Message ID: 2633     Entry time: Tue Feb 23 16:20:44 2010     In reply to: 2613
Author: steve 
Type: Configuration 
Category: VAC 
Subject: outgassing + leak 


As preparation for the upcoming planned power outage we turned turbos, RGA off and closed valves.

IFO chamber is not pumped now. Small leaks and out gassing will push the pressure up slowly. At 3 mTorr of P1 the PSL output shutter

will be closed by the interlock.

It is OK to use light in the IFO up to this point.

 Our vacuum was not pumped for 4 days. The computers were not up when we started pumping again. The manual reading on P1 was 15 mTorr.

This means that our outgassing plus leakrate is  ~3.8 mTorr /day 

3-5 mTorr / day is normal

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