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Entry  Wed Apr 8 09:36:20 2009, steve, Configuration, VAC, valve condition changed to BG to calibrate the RGA 
    Reply  Wed Apr 15 11:25:21 2009, steve, Configuration, VAC, RGA cal completed rga-090415-bg-d7-cald2.png
Message ID: 1459     Entry time: Wed Apr 8 09:36:20 2009     Reply to this: 1486
Author: steve 
Type: Configuration 
Category: VAC 
Subject: valve condition changed to BG to calibrate the RGA 

Vacuum normal valve condition was changed to accommodate SRS-RGA calibration.

 

The annulus valves were closed to free TP3 to pump on the RGA
VM1 was closed to isolate the RGA from the IFO.
 
 
VM3 opened to TP3.
 
This condition is called back ground (BG) mode. It is where we can calibrate and see the RGA background without the IFO.
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