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It would be about $50 for a microcontroller with display + temperature/barometric sensor + shipping if we wanted to order something as a prototype. Currently everything is in stock.</div>
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The cost would be higher if there were any specific features needed, ethernet vs wifi, local vs remote logging, etc.</div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Hovanes Egiyan <hovanes@jlab.org><br>
<b>Sent:</b> Thursday, June 1, 2023 3:35 PM<br>
<b>To:</b> Brian Eng <beng@jlab.org>; halld-controls@jlab.org <halld-controls@jlab.org><br>
<b>Cc:</b> njarvis@jlab.org <njarvis@jlab.org>; Naomi Jarvis <nsj@cmu.edu><br>
<b>Subject:</b> Re: Hall D controls meeting on Thursday, June 1st, 2023</font>
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Hi Brian, </div>
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thanks for looking into this issue. We will need to think about these. </div>
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Hovanes. </div>
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<div id="x_divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt; color:rgb(0,0,0)"><b>From:</b> Brian Eng <beng@jlab.org><br>
<b>Sent:</b> Thursday, June 1, 2023 2:39 PM<br>
<b>To:</b> halld-controls@jlab.org <halld-controls@jlab.org>; Hovanes Egiyan <hovanes@jlab.org><br>
<b>Cc:</b> njarvis@jlab.org <njarvis@jlab.org>; Naomi Jarvis <nsj@cmu.edu><br>
<b>Subject:</b> Re: Hall D controls meeting on Thursday, June 1st, 2023</font>
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<div class="x_x_elementToProof" style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
Regarding the Hall B ambient pressure PV: B_SYS_WEATHER_SF_L3_Press</div>
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It's currently using a MKS Baratron 1000 torr with 0.5% accuracy (~0.7 kPa) [ ~$1.5k]</div>
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Additional sensors from Dwyer have been ordered that are 30 psia with 1% accuracy (~2 kPa) [~$160] to add more pressure locations around the Hall.</div>
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That signal is going to a cRIO module that has a 24-bit ADC in high-speed mode 2ms conversion with 80 uV RMS and ~0.5% error.</div>
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The cRIO is sampling the sensor at 50 ms and averaging 20 samples to update to EPICS.</div>
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For Hall D: <span style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">There's nothing close to that for the CompactLogix series of PLC modules, the IF8 linked in the agenda is as good as it gets which has a 16-bit ADC (effectively
14bits) and there's no way to disable the filter (only change the rate). End result is around a 1mV/count resolution.</span></div>
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<span style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">The only thing better for A-B PLCs are some of the high resolution ControlLogix series modules. They have 24-bit ADCs. The Solenoid uses this series of PLC, but the
analog input modules it currently uses are just the "regular" 16-bit ADC versions. So it would require getting a new module (1756-IF8I $3619.18) as well as integrating it into the Solenoid PLC system.</span></div>
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<div class="x_x_elementToProof"><font face="Calibri, Arial, Helvetica, sans-serif" size="3"><font style="color:rgb(0,0,0)">As an alternative could assemble something with a microcontroller or Raspberry Pi and a separate ADC module or even just a b<span style="">arometric</span> sensor
(can get ones with +/- 3 Pascal accuracy). </font></font><font face="Calibri, Arial, Helvetica, sans-serif" style="color:rgb(0,0,0)"><span style="">This would be on the order of a few hundred dollars, depending on number of units.</span></font></div>
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<div id="x_x_divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt; color:rgb(0,0,0)"><b>From:</b> Halld-controls <halld-controls-bounces@jlab.org> on behalf of Hovanes Egiyan via Halld-controls <halld-controls@jlab.org><br>
<b>Sent:</b> Thursday, June 1, 2023 8:13 AM<br>
<b>To:</b> halld-controls@jlab.org <halld-controls@jlab.org><br>
<b>Cc:</b> njarvis@jlab.org <njarvis@jlab.org>; Naomi Jarvis <nsj@cmu.edu><br>
<b>Subject:</b> [Halld-controls] Hall D controls meeting on Thursday, June 1st, 2023</font>
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Hi,</div>
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<div class="x_x_x_ContentPasted0">Let's have a Hall D controls meeting today, Thursday, June 1st at 10:00am. I posted preliminary agenda on the wiki page:</div>
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https://halldweb.jlab.org/wiki/index.php/Controls_Meeting_1-Jun-2023
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<div class="x_x_x_ContentPasted0">Feel free to add more discussion topics to the agenda.</div>
<div class="x_x_x_ContentPasted0">You will need to use Zoom for Government app to join the meeting. The meeting information is given below. </div>
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<div class="x_x_x_ContentPasted0">Best,</div>
Hovanes<br>
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<span class="x_x_x_x_contentpasted0" style="margin:0px"><span class="x_x_x_ContentPasted1" style="margin:0px; color:rgb(32,31,30)">Topic: Hall D Controls Meeting</span></span></p>
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<span class="x_x_x_x_contentpasted0" style="margin:0px"><span class="x_x_x_ContentPasted1" style="margin:0px; color:rgb(32,31,30)"> </span></span><span style="margin:0px; color:rgb(36,36,36)"></span></p>
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<span class="x_x_x_x_contentpasted0" style="margin:0px"><span class="x_x_x_ContentPasted1" style="margin:0px; color:rgb(32,31,30)">Join ZoomGov Meeting</span></span><span style="margin:0px; color:rgb(36,36,36)"></span></p>
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<span class="x_x_x_x_contentpasted0" style="margin:0px"><span class="x_x_x_ContentPasted1" style="margin:0px; color:rgb(32,31,30)">https://jlab-org.zoomgov.com/j/1608429534</span></span><span style="margin:0px; color:rgb(36,36,36)"></span></p>
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<span class="x_x_x_x_contentpasted0" style="margin:0px"><span class="x_x_x_ContentPasted1" style="margin:0px; color:rgb(32,31,30)"> </span></span><span style="margin:0px; color:rgb(36,36,36)"></span></p>
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<span class="x_x_x_x_contentpasted0" style="margin:0px"><span class="x_x_x_ContentPasted1" style="margin:0px; color:rgb(32,31,30)">Zoom Meeting ID: 160 842 9534</span></span></p>
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