[Dsg-htcc] HTCC pressure

[Marc McMullen]

Seems fine, did you guys do anything to fix it? 

Marc McMullen 
Physics Division 
Detector Support Group 
7738 


From: "nick markov" <markov at jlab.org> 
To: "Marc McMullen" <mcmullen at jlab.org> 
Sent: Wednesday, January 4, 2017 4:30:12 PM 
Subject: Re: HTCC pressure 

I forgot to mention, 
easydew monitor was stuck at 1022 for humidity count (may be it is fine, but it does not update while EPICS does). 
Nick. 




On Jan 4, 2017, at 4:26 PM, nick markov < markov at jlab.org > wrote: 

This is a EPICS StripTool from slow control. 
Data is current, from today running. 
Nick. 

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On Jan 4, 2017, at 4:00 PM, Marc McMullen < mcmullen at jlab.org > wrote: 

Nick, 

Where is your plot info from? 



Marc McMullen 
Physics Division 
Detector Support Group 
7738 


From: "nick markov" < markov at jlab.org > 
To: "Marc McMullen" < mcmullen at jlab.org > 
Cc: "Youri Sharabian" < youris at jlab.org >, "Will Phelps" < wphelps at jlab.org > 
Sent: Wednesday, January 4, 2017 3:50:14 PM 
Subject: Re: HTCC pressure 

What somewhat bothers me is that (I’ve attached updated plot) variations change for no clear reasons from time to time: 

<Screen Shot 2017-01-04 at 3.48.16 PM.png> 


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On Jan 4, 2017, at 3:12 PM, Marc McMullen < mcmullen at jlab.org > wrote: 



Hi Nick, 

Your long plot looks like +/- 0.03 IWC, we have seen that much variation before. Brian sent a plot during a storm in an email from 9/14 which shows that much variation. 



Thanks, 
Marc 
On 1/4/2017 2:31 PM, nick markov wrote: 

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Hi Marc, 
Happy New Year! 
we were monitoring differential pressure in the HTCC and found a lot of variations. 
Some of them are rather slow (X scale is in minutes): 

<Mail Attachment.png> 

but we also have a rapid variations as well (scale in seconds): 

<Mail Attachment.png> 
Could you look at this? 
Thank you very much, Nick. 



-- 
Marc McMullen
Detector Support Group
757-269-7738 

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