[Dsg-ltcc] Fwd: Re: LTCC gas system

[Maurizio Ungaro]

Hi,

Any idea where are the leaks coming from - and can we fix that.
0.5 liters / minute is very significant. 

Thanks,
Mauri


> On Dec 2, 2016, at 10:21 AM, Marc McMullen <mcmullen at jlab.org> wrote:
> 
> Hi Dave,
> It appears that 0.5Lpm was not enough flow to maintain pressure on 2 and 6. We have increased the flow and will monitor it, and dial it back when necessary. 
> Sectors 2 and 6 look to be significant leaks
> 
> Sector 1 flow is almost always on, but will maintain pressure. So definitely a leak there but smaller.
> 
> Sector 3 appears to leak a little.
> 
> Sectors 4 and 5 looks insignificant.
> 
> 
> Marc
> 
> On 12/2/2016 7:48 AM, David Anderson wrote:
>> George, When you or Marc get time I need some assistance with this gas panel. We have lost almost all pressure on 6 and 2. Thanks! ----- Original Message ----- From: David Anderson To: George Jacobs , Marc Mcmullen Cc: Douglas Tilles , Bob Miller Sent: Thu, 01 Dec 2016 08:58:43 -0500 (EST) Subject: LTCC gas system George and Marc, I have been asked to begin leak checking the entire LTCC gas circuit. The chambers had a thorough leak check and min 24 hour pressure drop test before they were hoisted and installed. Another complete leak check of the chambers is not going to be possible due to very limited access to the bottom windows. However we can pressurize the system and perform pressure drop tests to begin with. I have no knowledge of the gas panel progress or operation so I am requested your assistance with this. Has any leak checking of the gas circuit itself been performed? Thanks, David
> 
> -- 
> Marc McMullen
> Detector Support Group
> 757-269-7738
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