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<div>Hi Nathan, </div>
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<div dir="ltr">We got some complaints from RICH group that some of their temperature sensors weren’t updating. </div>
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<div dir="ltr">I looked at it and saw that the values were indeed updating, so I changed those PVs’ MDEL field from 0.01 to 0 so the values are more likely to update on the GUI indicators. </div>
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<div dir="ltr">Is there anything I should update in regards to documentation that this change was made?</div>
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<div dir="ltr">Thanks,</div>
<div dir="ltr">Tyler</div>
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<div id="divRplyFwdMsg" dir="ltr" data-ogsc="" style=""><font face="Calibri, sans-serif" color="#000000" style="font-size: 11pt;" data-ogsc=""><b>From:</b> Dsg-rich <dsg-rich-bounces@jlab.org> on behalf of Tyler Lemon <tlemon@jlab.org><br>
<b>Sent:</b> Wednesday, April 1, 2020 5:05:48 PM<br>
<b>To:</b> Valery Kubarovsky <vpk@jlab.org>; dsg-rich <dsg-rich@jlab.org><br>
<b>Subject:</b> Re: [Dsg-rich] Electronics panel temp and humidity</font>
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Hi Valery,</div>
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Since I'm still not really sure what you are saying is wrong besides the two-decimal place value not changing on the CSS screen, I just went a head and reduced the MDEL field for the EP temperatures to 0 so any change, no matter how small, is displayed in EPICS.
Please note that this is different than the MyaArchiver deadband, that has not changed.</div>
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The MDEL field was implemented by Nathan some time ago to limit network traffic for those PVs. We already lowered them once a few months ago but now they are set to zero.</div>
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Attached is a screenshot of a live view of MyaPlot showing that the temperature sensors are indeed updating in EPICS. Note that there are some PVs, like Temperature 10, 11, 13, and 14 who are still not changing more than 0.01 deg C. These indicators will still
look like they are frozen on the CSS screen since their change is below the indicator's precision.<br>
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Tyler<br>
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<div id="x_divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size: 11pt;" data-ogsc=""><b>From:</b> Valery Kubarovsky <vpk@jlab.org><br>
<b>Sent:</b> Wednesday, April 1, 2020 4:38 PM<br>
<b>To:</b> Tyler Lemon <tlemon@jlab.org><br>
<b>Cc:</b> Valery Kubarovsky <vpk@jlab.org><br>
<b>Subject:</b> Re: Electronics panel temp and humidity</font>
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<p class="x_x_MsoNormal">Tyler,</p>
<p class="x_x_MsoNormal">I believe that the sensors cannot stay constant with the accuracy 0.001C.</p>
<p class="x_x_MsoNormal">And I remember that the picture in EP and N@ readings was the same. I saw actually in your GUI</p>
<p class="x_x_MsoNormal">How temperatures are changing a bit.</p>
<p class="x_x_MsoNormal">Thanks,</p>
<p class="x_x_MsoNormal">Valery</p>
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<p class="x_x_MsoNormal"><b><span style="font-size: 12pt; color: black;">From: </span>
</b><span style="font-size: 12pt; color: black;">Tyler Lemon <tlemon@jlab.org><br>
<b>Date: </b>Wednesday, April 1, 2020 at 4:35 PM<br>
<b>To: </b>Valery Kubarovsky <vpk@jlab.org>, "Contalbrigo, Marco" <mcontalb@fe.infn.it>, "Marco, Mirazita" <marco.mirazita@lnf.infn.it>, dsg-rich <dsg-rich@jlab.org><br>
<b>Subject: </b>Re: Electronics panel temp and humidity</span></p>
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<p class="x_x_MsoNormal">Yes, the sensors in the N2 volume and EP are the same hardware and they have always behaved differently in terms of their reading because they are in different regions of the RICH.</p>
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<p class="x_x_MsoNormal">I’ve checked each temperature and humidity PV for the EP and can see them changing.</p>
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<p class="x_x_MsoNormal">I also verified that the N2 flow PV is changing and at the expected value.</p>
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<p class="x_x_MsoNormal">Can you give more details on what you see that is wrong?</p>
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<p class="x_x_MsoNormal"><b><span style="color: black;">From:</span></b><span style="color: black;"> Valery Kubarovsky <vpk@jlab.org><br>
<b>Sent:</b> Wednesday, April 1, 2020 4:28:16 PM<br>
<b>To:</b> Tyler Lemon <tlemon@jlab.org>; Contalbrigo, Marco <mcontalb@fe.infn.it>; Marco, Mirazita <marco.mirazita@lnf.infn.it>; dsg-rich <dsg-rich@jlab.org><br>
<b>Subject:</b> Re: Electronics panel temp and humidity</span> </p>
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<p class="x_x_MsoNormal" style="background-color: white;"><span style="font-size: 14pt; color: black;">Tyler,</span></p>
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<p class="x_x_MsoNormal" style="background-color: white;"><span style="font-size: 14pt; color: black;">It was different yesterday. Something wrong. The sensors are the same in EP and N2 volumes but they behave differently, right?</span></p>
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<p class="x_x_MsoNormal" style="background-color: white;"><span style="font-size: 14pt; color: black;">Thanks,</span></p>
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<p class="x_x_MsoNormal" style="background-color: white;"><span style="font-size: 14pt; color: black;">Valery</span></p>
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<p class="x_x_MsoNormal"><b><span style="color: black;">From:</span></b><span style="color: black;"> Tyler Lemon <tlemon@jlab.org><br>
<b>Sent:</b> Wednesday, April 1, 2020 16:25<br>
<b>To:</b> Valery Kubarovsky <vpk@jlab.org>; Contalbrigo, Marco <mcontalb@fe.infn.it>; Marco, Mirazita <marco.mirazita@lnf.infn.it>; dsg-rich <dsg-rich@jlab.org><br>
<b>Subject:</b> Re: Electronics panel temp and humidity</span> </p>
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<p class="x_x_MsoNormal"><span style="font-size: 12pt; color: black;">Valery,</span></p>
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<p class="x_x_MsoNormal"><span style="font-size: 12pt; color: black;"> </span></p>
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<p class="x_x_MsoNormal"><span style="font-size: 12pt; color: black;">I can see value for the humidity sensors and temperature sensors in the EP change when I use "caget" from the command line.</span></p>
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<p class="x_x_MsoNormal"><span style="font-size: 12pt; color: black;"> </span></p>
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<p class="x_x_MsoNormal"><span style="font-size: 12pt; color: black;">The temperature sensors are changing very very little (~ 0.001 C) so you can't see that on the EP GUI because all of the indicators only go down to 0.01 precision.</span></p>
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<p class="x_x_MsoNormal"><span style="font-size: 12pt; color: black;"> </span></p>
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<p class="x_x_MsoNormal"><span style="font-size: 12pt; color: black;">There are some humidity sensors returning 0, but that has been that way for all of RICH's life when any electronics are on (LV is on now, according to RICH overview screen on EPICS). This
is because electronics make it hotter, and the higher temperature, the lower the relative humidity in the environment.</span></p>
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<p class="x_x_MsoNormal"><span style="font-size: 12pt; color: black;"> </span></p>
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<p class="x_x_MsoNormal"><span style="font-size: 12pt; color: black;">Tyler</span></p>
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<p class="x_x_MsoNormal"><span style="font-size: 12pt; color: black;"> </span></p>
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<p class="x_x_MsoNormal"><b><span style="color: black;">From:</span></b><span style="color: black;"> Valery Kubarovsky <vpk@jlab.org><br>
<b>Sent:</b> Wednesday, April 1, 2020 4:09 PM<br>
<b>To:</b> Tyler Lemon <tlemon@jlab.org>; Contalbrigo, Marco <mcontalb@fe.infn.it>; Marco, Mirazita <marco.mirazita@lnf.infn.it>; dsg-rich <dsg-rich@jlab.org><br>
<b>Subject:</b> Re: Electronics panel temp and humidity</span> </p>
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<p class="x_x_MsoNormal" style="background-color: white;"><span style="font-size: 14pt; color: black;">But N2 sensors are updating normally. I can see it.</span></p>
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<p class="x_x_MsoNormal" style="background-color: white;"><span style="font-size: 14pt; color: black;">I can see it from your GUI.</span></p>
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<p class="x_x_MsoNormal" style="background-color: white;"><span style="font-size: 14pt; color: black;">I don't see any changes in EP volume.</span></p>
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<p class="x_x_MsoNormal"><b><span style="color: black;">From:</span></b><span style="color: black;"> Tyler Lemon <tlemon@jlab.org><br>
<b>Sent:</b> Wednesday, April 1, 2020 16:06<br>
<b>To:</b> Valery Kubarovsky <vpk@jlab.org>; Contalbrigo, Marco <mcontalb@fe.infn.it>; Marco, Mirazita <marco.mirazita@lnf.infn.it>; dsg-rich <dsg-rich@jlab.org><br>
<b>Subject:</b> Re: Electronics panel temp and humidity</span> </p>
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<p class="x_x_MsoNormal"><span style="font-size: 12pt; color: black;">Hi Valery,</span></p>
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<p class="x_x_MsoNormal"><span style="font-size: 12pt; color: black;"> </span></p>
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<p class="x_x_MsoNormal"><span style="font-size: 12pt; color: black;">I can see that the EP temperatures and humidity are indeed updating on EPICS but a very small amount (~ 0.001). These changes aren't seen on the GUI for the sensors because those indicators
only go down to 0.01 deg C precision. </span></p>
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<p class="x_x_MsoNormal"><span style="font-size: 12pt; color: black;"> </span></p>
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<p class="x_x_MsoNormal"><span style="font-size: 12pt; color: black;">The N2 flow measurement is good as well, changes there are ~0.01 slm.</span></p>
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<p class="x_x_MsoNormal"><span style="font-size: 12pt; color: black;"> </span></p>
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<p class="x_x_MsoNormal"><span style="font-size: 12pt; color: black;">I also verified I could see these values changing in a live plot on MyaPlot.</span></p>
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<p class="x_x_MsoNormal"><span style="font-size: 12pt; color: black;"> </span></p>
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<p class="x_x_MsoNormal"><span style="font-size: 12pt; color: black;">Tyler</span></p>
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<p class="x_x_MsoNormal"><b><span style="color: black;">From:</span></b><span style="color: black;"> Valery Kubarovsky <vpk@jlab.org><br>
<b>Sent:</b> Wednesday, April 1, 2020 3:54 PM<br>
<b>To:</b> Tyler Lemon <tlemon@jlab.org><br>
<b>Cc:</b> Marco Contalbrigo <mcontalb@fe.infn.it>; Marco Mirazita <marco.mirazita@lnf.infn.it><br>
<b>Subject:</b> Electronics panel temp and humidity</span> </p>
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<p class="x_x_MsoNormal" style="background-color: white;"><span style="font-size: 14pt; color: black;">Hi Tyler,</span></p>
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<p class="x_x_MsoNormal" style="background-color: white;"><span style="font-size: 14pt; color: black;">It looks for me that electronics panel temperature and humidity sensors are frozen.</span></p>
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<p class="x_x_MsoNormal" style="background-color: white;"><span style="font-size: 14pt; color: black;">Could you please take a look?</span></p>
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<p class="x_x_MsoNormal" style="background-color: white;"><span style="font-size: 14pt; color: black;">Hopefully, the nitrogen sensors are OK.</span></p>
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<p class="x_x_MsoNormal" style="background-color: white;"><span style="font-size: 14pt; color: black;">Thanks,</span></p>
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<p class="x_x_MsoNormal" style="background-color: white;"><span style="font-size: 14pt; color: black;">Valery</span></p>
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<p class="x_x_MsoNormal" style="background-color: white;"><span style="font-size: 14pt; color: black;"> </span></p>
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