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It is great to know about the system readiness. Yes, we need to start 220 deg run.</div>
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The test is crucial for the GEp run approval.</div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> 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> Friday, September 29, 2023 12:49 PM<br>
<b>To:</b> dsg-halla_ecal@jlab.org <dsg-halla_ecal@jlab.org><br>
<b>Cc:</b> Ed Folts <folts@jlab.org><br>
<b>Subject:</b> [Dsg-halla_ecal] ECAL heater controls and monitoring update</font>
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Hi Bogdan and Don,</div>
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I was able to install a 16 channel thermocouple module in the cRIO during the maintenance day. I am monitoring 15 of the 16 channels of the crystals which includes the front and back of each supermodule, the left and right side, and the space between the top-middle
supermodules and the middle-bottom supermodules.</div>
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I have named the sensors by position to eliminate any channel numbering confusion (see attached monitoring screen photo).<br>
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I developed a labVIEW display for these temperatures as well as a log file recorded on the cRIO SD card (remotely accessible).</div>
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Next maintenance day I plan to debug the 16<span><sup>th</sup> sensor and confirm the measurement locations of all 16 sensors.<br>
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<span><b>***NOTE: these 16 thermocouples are not part of the controls system, and have no effect on how the heaters run. They only provide measurement data for the surface of the crystals.***</b><br>
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As far as the controls system, I ran the low temperature test and all channels are functioning. See the attached plot from 09/21. I suggest we meet with Ed next week to go over your plan to go to operational temperature (220 degrees C on the front crystals).
I will set up a meeting next week after I debug and verify the crystal temperature sensors, assuming there is a maintenance day and I am available.
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Regards,</div>
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Marc<br>
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