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Hi Marco,<br>
<br>
Looking at the air pressure strip chart, all I see is what I would
expect to see. Except for when you shut the valves. That is the air
compressor in it's normal cycle. <br>
<br>
Looking at the air flow cycling, this may indicate the pressure
regulators on the air panel are turned all the way up. These should
be adjusted to 40-50 psi to minimize the effect of the tank supply
pressure variations on flow.<br>
<br>
George<br>
<br>
<div class="moz-cite-prefix">On 1/16/2018 9:21 AM, Marco Mirazita
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:d570599ca6f809ebf2825b7b6b78305f@webmail.lnf.infn.it">Hi
George,
<br>
when the flow drops to zero in the graphs, it's because I closed
the lines to the RICH for a while.
<br>
After that, the flow was more stable, but the air pressure still
has large fluctuations, larger than what I see on the manometer on
the tank.
<br>
Marco
<br>
<br>
<br>
<br>
Il 2018-01-16 09:12 George Jacobs ha scritto:
<br>
<blockquote type="cite">This may not be an air compressor issue.
Flow would not go from 500
<br>
to 0 instantly, there would be a gradual decline. It is more
likely
<br>
this could be a cRio or crate issue with the flow and pressure
<br>
interlock signals.
<br>
<br>
George
<br>
<br>
On 1/15/2018 4:59 PM, Marco Mirazita wrote:
<br>
<br>
<blockquote type="cite">Here:
<br>
<a class="moz-txt-link-freetext" href="https://logbooks.jlab.org/entry/3514198">https://logbooks.jlab.org/entry/3514198</a> [1]
<br>
<br>
Il 2018-01-15 16:35 Valery Kubarovsky ha scritto:
<br>
Marco,
<br>
Could you please post the oscillation of the air pressure
today
<br>
morning in more detail?
<br>
Thanks,
<br>
Valery
<br>
<br>
-------------------------
<br>
<br>
FROM: "Marco Mirazita" <a class="moz-txt-link-rfc2396E" href="mailto:Marco.Mirazita@lnf.infn.it"><Marco.Mirazita@lnf.infn.it></a>
<br>
TO: "Valery Kubarovsky" <a class="moz-txt-link-rfc2396E" href="mailto:vpk@jlab.org"><vpk@jlab.org></a>
<br>
CC: "dsg-rich" <a class="moz-txt-link-rfc2396E" href="mailto:dsg-rich@jlab.org"><dsg-rich@jlab.org></a>
<br>
SENT: Monday, January 15, 2018 3:38:45 PM
<br>
SUBJECT: Re: [Dsg-rich] RICH air cooling
<br>
<br>
Please have a look at this logbook entry
<br>
<a class="moz-txt-link-freetext" href="https://logbooks.jlab.org/entry/3513977">https://logbooks.jlab.org/entry/3513977</a> [2]
<br>
Marco
<br>
<br>
Il 2018-01-15 14:41 Valery Kubarovsky ha scritto:
<br>
Could you please post the time history for pressure and air
flow?
<br>
Thanks,
<br>
Valery
<br>
<br>
On Jan 15, 2018, at 14:38, Marco Mirazita
<br>
</blockquote>
<a class="moz-txt-link-rfc2396E" href="mailto:Marco.Mirazita@lnf.infn.it"><Marco.Mirazita@lnf.infn.it></a>
<br>
<br>
<blockquote type="cite">
<blockquote type="cite">wrote:
<br>
<br>
I don't know exactly what happened. This morning I reduced
the
<br>
</blockquote>
</blockquote>
air
<br>
<br>
<blockquote type="cite">
<blockquote type="cite">flow of the line A from 550 to 500 and
after a while the air flow
<br>
</blockquote>
</blockquote>
and
<br>
<br>
<blockquote type="cite">the pressure started to go up and down.
<br>
Marco
<br>
<br>
Il 2018-01-15 14:31 Valery Kubarovsky ha scritto:
<br>
Hi Marco,
<br>
Did you investigate what happened?
<br>
I saw the drop in the air pressure in the tank. Was compressor
<br>
</blockquote>
on
<br>
<br>
<blockquote type="cite">when
<br>
you were in the Hall?
<br>
Valery
<br>
On Jan 15, 2018, at 14:26, Marco Mirazita
<br>
<a class="moz-txt-link-rfc2396E" href="mailto:Marco.Mirazita@lnf.infn.it"><Marco.Mirazita@lnf.infn.it></a> wrote:
<br>
Hi all,
<br>
in the last couple of days we experienced some instability in
<br>
</blockquote>
the
<br>
<br>
<blockquote type="cite">RICH air cooling system, resulting in
the interlock shutting
<br>
</blockquote>
down
<br>
<br>
<blockquote type="cite">the electronics power supply.
<br>
The interlock limits have now been changed to avoid that.
<br>
Since the hall is now open till tomorrow at noon, it would be
a
<br>
</blockquote>
good
<br>
<br>
<blockquote type="cite">opportunity to check the system.
<br>
Marco
<br>
_______________________________________________
<br>
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<br>
<a class="moz-txt-link-abbreviated" href="mailto:Dsg-rich@jlab.org">Dsg-rich@jlab.org</a>
<br>
<a class="moz-txt-link-freetext" href="https://mailman.jlab.org/mailman/listinfo/dsg-rich">https://mailman.jlab.org/mailman/listinfo/dsg-rich</a> [3]
<br>
_______________________________________________
<br>
Dsg-rich mailing list
<br>
<a class="moz-txt-link-abbreviated" href="mailto:Dsg-rich@jlab.org">Dsg-rich@jlab.org</a>
<br>
<a class="moz-txt-link-freetext" href="https://mailman.jlab.org/mailman/listinfo/dsg-rich">https://mailman.jlab.org/mailman/listinfo/dsg-rich</a> [3]
<br>
</blockquote>
_______________________________________________
<br>
Dsg-rich mailing list
<br>
<a class="moz-txt-link-abbreviated" href="mailto:Dsg-rich@jlab.org">Dsg-rich@jlab.org</a>
<br>
<a class="moz-txt-link-freetext" href="https://mailman.jlab.org/mailman/listinfo/dsg-rich">https://mailman.jlab.org/mailman/listinfo/dsg-rich</a> [3]
<br>
<br>
--
<br>
George Jacobs
<br>
Jefferson Lab (TJNAF)
<br>
STE 12
<br>
12000 Jefferson Ave.
<br>
Newport News, VA 23606
<br>
<br>
(office) 757-269-7115
<br>
<br>
(cell) 757-876-0480
<br>
<br>
(email) <a class="moz-txt-link-abbreviated" href="mailto:jacobsg@jlab.org">jacobsg@jlab.org</a>
<br>
<br>
(website) <a class="moz-txt-link-freetext" href="https://userweb.jlab.org/~jacobsg">https://userweb.jlab.org/~jacobsg</a> [4]
<br>
<br>
<br>
Links:
<br>
------
<br>
[1] <a class="moz-txt-link-freetext" href="https://logbooks.jlab.org/entry/3514198">https://logbooks.jlab.org/entry/3514198</a>
<br>
[2] <a class="moz-txt-link-freetext" href="https://logbooks.jlab.org/entry/3513977">https://logbooks.jlab.org/entry/3513977</a>
<br>
[3] <a class="moz-txt-link-freetext" href="https://mailman.jlab.org/mailman/listinfo/dsg-rich">https://mailman.jlab.org/mailman/listinfo/dsg-rich</a>
<br>
[4] <a class="moz-txt-link-freetext" href="https://userweb.jlab.org/~jacobsg">https://userweb.jlab.org/~jacobsg</a>
<br>
</blockquote>
</blockquote>
<br>
<pre class="moz-signature" cols="72">--
George Jacobs
Jefferson Lab (TJNAF)
STE 12
12000 Jefferson Ave.
Newport News, VA 23606
(office) 757-269-7115
(cell) 757-876-0480
(email) <a class="moz-txt-link-abbreviated" href="mailto:jacobsg@jlab.org">jacobsg@jlab.org</a>
(website) <a class="moz-txt-link-freetext" href="https://userweb.jlab.org/~jacobsg">https://userweb.jlab.org/~jacobsg</a></pre>
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