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    User name brads

    Log entry time 10:43:07 on October28,2008

    Entry number 245111

    This entry is a followup to: 244954

    keyword=Increased flow and pressure trip point for BB Cerenkov

    Increased flow and pressure trip point for BB Cerenkov. Flow increased so we can complete the nominal fill in a couple of hours.

    The pressure regulator turned off the flow early even though the purge valve was open. There are no obstructions at the the valve (no freezing, etc). I guess we're getting close to full and the C4F8O gas column in the gas lines is heavy enough to exceed the 0.30" H2O trip point. The snapshot shows the time (and pressure) the valve turned off.



    FIGURE 1