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Hi Patricia,</div>
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The short answer is yes. This test is covered under a task list. This is the way we have been running these tests from the beginning although the task list has evolved as changes were required. We have to run the system overnight or we can't get the data we
need to confirm it actually works well. When we did this months ago on a similar but 120VAC version of the system (the new system is 48VDC), we ran it without automated controls and just came in to monitor the temperatures and adjust the current manually.
That worked, but it is tedious. Now that we have controls, we expect the system to behave better and to take less time to regulate to the correct temperature than our previous "manual" adjustment and so far it appears to be working very well. But since the
controls haven't been fully vetted, I think we should treat it like it is a manual control and come in regularly to check on it. I understand your concern. I don't think I am being cavalier here because this appears to carry very low risk. I was planning on
a check in frequency of every 3 hours. If you want to increase that I can accommodate. I suppose I could just stay all night as well if that is required, but I would like to run it non-stop for several days to get some hard data. If you request, I can also
just turn it off overnight, but we will then have to decide how to proceed with making procurements without a system tested up to expected running temperatures. </div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);" class="elementToProof">
Please let me know if Jimmy and I should alter our plans.</div>
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There is also an added complication that I may have to report for jury duty later this week.</div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);" class="elementToProof">
-Don</div>
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Donald Jones</div>
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Hall A/C Staff Scientist</div>
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Jefferson Lab</div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
Newport News, VA</div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Patrizia Rossi <rossi@jlab.org><br>
<b>Sent:</b> Monday, August 14, 2023 4:02 PM<br>
<b>To:</b> Donald Jones <jonesdc@jlab.org>; dsg-halla_ecal@jlab.org <dsg-halla_ecal@jlab.org>; Marc Mcmullen <mcmullen@jlab.org>; Ed Folts <folts@jlab.org>; Mark Jones <jones@jlab.org><br>
<b>Subject:</b> Re: ECal test stand</font>
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<p class="x_MsoNormal"><span style="font-size:12.0pt">Hi Don,</span></p>
<p class="x_MsoNormal"><span style="font-size:12.0pt"> </span></p>
<p class="x_MsoNormal"><span style="font-size:12.0pt">Do you have the right and approved documentation in place to run the test that you are suggesting?</span></p>
<p class="x_MsoNormal"><span style="font-size:12.0pt">I am a little bit scared about your statement
</span></p>
<p class="x_MsoNormal"><span style="font-size:12.0pt; color:red">“</span><span style="font-size:12.0pt; color:red">we haven't used this control+power supply sufficiently, so we will need to come in physically to make sure everything is behaving as expected…..”</span></p>
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<p class="x_MsoNormal"><span class="x_rynqvb"><span lang="EN" style="font-size:12.0pt">The last thing that we need is to get into an accident because the work has not be planned as it should have been</span></span></p>
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<p class="x_MsoNormal"><span style="font-size:12.0pt; color:black">patrizia</span></p>
<p class="x_MsoNormal"><span style="font-size:12.0pt"> </span></p>
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<p class="x_MsoNormal"><span style="color:black">-------------------------------------------</span></p>
<p class="x_MsoNormal"><span style="color:black"># Patrizia Rossi<br>
# Jefferson Lab <br>
# 12000 Jefferson Avenue<br>
# Suite 5<br>
# Newport News VA 23606 (USA)<br>
# e-mail: </span><a href="mailto:rossi@jlab.org">rossi@jlab.org</a><span style="color:black"><br>
# phone: +1 (757) 269 7740<br>
# fax: + 1 (757) 269 5800</span></p>
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<p class="x_MsoNormal" style="margin-bottom:12.0pt"><b><span style="font-size:12.0pt; color:black">From:
</span></b><span style="font-size:12.0pt; color:black">Dsg-halla_ecal <dsg-halla_ecal-bounces@jlab.org> on behalf of Donald Jones via Dsg-halla_ecal <dsg-halla_ecal@jlab.org><br>
<b>Date: </b>Monday, August 14, 2023 at 3:54 PM<br>
<b>To: </b>dsg-halla_ecal@jlab.org <dsg-halla_ecal@jlab.org>, Marc Mcmullen <mcmullen@jlab.org><br>
<b>Subject: </b>Re: [Dsg-halla_ecal] ECal test stand</span></p>
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<p class="x_MsoNormal"><span style="font-size:12.0pt; color:black">Hi Marc,</span></p>
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<p class="x_MsoNormal"><span style="font-size:12.0pt; color:black">Jimmy and I adjusted the settings higher. Everything seems to be behaving as expected. We need to get data on the fully heated system ASAP so that we can place an order for heaters and power
supplies this fiscal year (as in this week). As we discussed this morning, since the system is new and may not behave exactly as we expect, we will need to monitor it more closely. After watching it today, I realized it will not reach temperatures we need
during our regular 8 to 10 hour workday, so Jimmy and I agreed to run the system overnight by alternating coming in to check on it every few hours throughout the evening and night. We can tweak setpoints as necessary or even shut it down if there is an issue.
We carefully monitored each material used in the enclosure for temperature rating and have already run the heaters and enclosure to much hotter temperatures than what we are aiming for here, so I am not worried about unexpected material flammability. However,
we haven't used this control+power supply sufficiently, so we will need to come in physically to make sure everything is behaving as expected. Checking every few hours should be sufficient to catch an unexpected runaway effect. We should physically check the
power supplies to make sure they aren't overheating and that the system as a whole is behaving safely and meeting expectations. If there is a way for us to monitor it remotely like you do, that would be handy too.</span></p>
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<p class="x_MsoNormal"><span style="font-size:12.0pt; color:black">-Don</span></p>
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<p class="x_MsoNormal"><span style="font-size:12.0pt; color:black"> </span></p>
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<p class="x_MsoNormal"><span style="font-size:12.0pt; color:black">Donald Jones</span></p>
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<p class="x_MsoNormal"><span style="font-size:12.0pt; color:black">Hall A/C Staff Scientist</span></p>
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<p class="x_MsoNormal"><span style="font-size:12.0pt; color:black">Jefferson Lab</span></p>
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<p class="x_MsoNormal"><span style="font-size:12.0pt; color:black">Newport News, VA</span></p>
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<p class="x_MsoNormal"><b><span style="color:black">From:</span></b><span style="color:black"> Dsg-halla_ecal <dsg-halla_ecal-bounces@jlab.org> on behalf of Marc Mcmullen via Dsg-halla_ecal <dsg-halla_ecal@jlab.org><br>
<b>Sent:</b> Monday, August 14, 2023 1:54 PM<br>
<b>To:</b> dsg-halla_ecal@jlab.org <dsg-halla_ecal@jlab.org>; Marc Mcmullen <mcmullen@jlab.org><br>
<b>Subject:</b> Re: [Dsg-halla_ecal] ECal test stand</span> </p>
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<p class="x_MsoNormal"><span style="font-size:12.0pt; color:black">Hi Don,</span></p>
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<p class="x_MsoNormal"><span style="font-size:12.0pt; color:black"> </span></p>
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<p class="x_MsoNormal"><span style="font-size:12.0pt; color:black">I have a meeting to attend, but here is a plot of the current temperatures if you wanted to make an adjustment at the test stand.</span></p>
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<p class="x_MsoNormal"><span style="font-size:12.0pt; color:black"> </span></p>
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<p class="x_MsoNormal"><span style="font-size:12.0pt; color:black">Marc</span></p>
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<p class="x_MsoNormal"><b><span style="color:black">From:</span></b><span style="color:black"> Dsg-halla_ecal <dsg-halla_ecal-bounces@jlab.org> on behalf of Marc Mcmullen via Dsg-halla_ecal <dsg-halla_ecal@jlab.org><br>
<b>Sent:</b> Monday, August 14, 2023 10:08 AM<br>
<b>To:</b> dsg-halla_ecal@jlab.org <dsg-halla_ecal@jlab.org><br>
<b>Subject:</b> [Dsg-halla_ecal] ECal test stand</span> </p>
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<p class="x_MsoNormal"><span style="font-size:12.0pt; color:black">Hi Don,</span></p>
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<p class="x_MsoNormal"><span style="font-size:12.0pt; color:black"> </span></p>
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<p class="x_MsoNormal"><span style="font-size:12.0pt; color:black">Are you available to go to the test stand this morning. If so we should test the system at operational temperatures (enough to get the crystal fronts to 220C).</span></p>
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<p class="x_MsoNormal"><span style="font-size:12.0pt; color:black">I will be on vacation starting Tuesday afternoon. During my absence contact Brian Eng or Tyler Lemon if there is an issue with the controls.</span></p>
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<p class="x_MsoNormal"><span style="font-size:12.0pt; color:black">During the testing phase, the system should not be run without someone monitoring it. The test station has the controls running on the local monitor.</span></p>
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<p class="x_MsoNormal"><span style="font-size:12.0pt; color:black"> </span></p>
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<p class="x_MsoNormal"><span style="font-size:12.0pt; color:black">Marc</span></p>
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