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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: 1486     Entry time: Wed Apr 15 11:25:21 2009     In reply to: 1459
Author: steve 
Type: Configuration 
Category: VAC 
Subject: RGA cal completed 

Quote:

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.

 Vacuum valve configuration is back to VACUUM NORMAL  condition. RGA  calibration  completed.

RGA  scan attached is the backgroud of the rga with std cal leak open, sn 08581

Krypton at amu 84 and Argon at amu 40 are the cal signals.

 

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