[Dsg-halla_gem] [EXTERNAL] Re: Re: Add an ADC to RPi for gas flows?

[Brad Sawatzky]

Hi Marc,

We want to track the Ar/CO2 ratio.  Jack has this set up on the Hall gas
system, and we would like to do the same on the EEL setup.

-- Brad

On Mon, 07 Mar 2022, Marc Mcmullen wrote:

> Hi Brad,
> 
> Steve is correct. I have a softIOC on the Rpi which I use for testing
> and development. When it is running on the Hall A dev s/n in the EEL
> the PVs do not get out to the WEDM server. This is probably a security
> issue with the firewall.
> 
> Thanks for adding the PV for the gas analyzer, I'll pick up the ADC
> from Jack and discuss this with our group on getting this signal added
> to the GEM SBS readout.
> 
> Are you guys just trying to verify the Ar/CO2 mixture of the gas or
> are you looking for something in the gas composition?
> 
> Regards,
> Marc McMullen
> Sr. Instrumentation Designer
> Detector Support Group
> (757) 269-7738
> ----------------------------------------------------------------------------
> 

> From: Brad Sawatzky <brads at jlab.org>
> Sent: Saturday, March 5, 2022 11:10:04 AM
> To: Stephen Wood <saw at jlab.org>
> Cc: Marc Mcmullen <mcmullen at jlab.org>
> Subject: [EXTERNAL] Re: [Dsg-halla_gem] Re: Add an ADC to RPi for gas flows?
> 
> Makes sense, I was guessing it was something like that.
> 
> -- Brad
> 
> On Sat, 05 Mar 2022, Stephen Wood wrote:
> 
> > Brad:
> >
> > I think this is the way that Marc wanted it done when it was initially
> > set up.   I think it was because he wanted his signals to be visible
> > with WEDM and WEDM couldn't see signals past the accelerator site
> > firewall.  (For GEMs not in the Hall.)   Since I was setting up IOCs
> > on adaqsc, it was a simple matter to add an IOC to house Marc's
> > signals.
> >
> > Steve
> >
> > > On Mar 4, 2022, at 8:08 PM, Brad Sawatzky <brads at jlab.org> wrote:
> > >
> > > Thanks Steve, found it.  Not that it matters much, but why is the
> > > RPi pushing to a softIOC on adaqsc rather than serving the PVs
> > > directly from the RPi?  Is it related to the RPi being on a dev
> > > subnet?
> >
> >
> 
-- 
Brad Sawatzky (he/him), PhD <brads at jlab.org> -<>- Jefferson Lab/ Hall C/C111
Ph: 757-269-5947  -<>-  Fax: 757-269-5235  -<>- Pager: brads-page at jlab.org
The most exciting phrase to hear in science, the one that heralds new
  discoveries, is not "Eureka!" but "That's funny..."   -- Isaac Asimov