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Hi,</div>
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I thought I would forward this email to you all. Rick Adrover says the power supplies are good. They are UL-recognized. Marc, I have received 4 more. Do you want to check them before we install them?</div>
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-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>
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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> Rick Adrover <adrover@jlab.org><br>
<b>Sent:</b> Wednesday, June 21, 2023 1:06 PM<br>
<b>To:</b> Donald Jones <jonesdc@jlab.org><br>
<b>Cc:</b> Adrienne Manley <manley@jlab.org><br>
<b>Subject:</b> Re: power supply approval</font>
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Don,</div>
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This component is good to use. <br>
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It is not UL listed, it is UL recognized. (That is the symbol with the backwards R). UL makes a distinction between listed and recognized. A 'recognized' component is used as a constituent part in building a larger piece of equipment. A 'listed' piece of
equipment is certified for a purpose or use as an entire unit.<br>
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I verified that the component is recognized on UL's site, just to make sure there are not problems.</div>
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Rick<br>
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<div id="x_divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> Donald Jones <jonesdc@jlab.org><br>
<b>Sent:</b> Wednesday, June 21, 2023 12:37 PM<br>
<b>To:</b> Rick Adrover <adrover@jlab.org><br>
<b>Cc:</b> Adrienne Manley <manley@jlab.org><br>
<b>Subject:</b> power supply approval</font>
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Hi Rick,</div>
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The way my thinking and our testing is developing, it is looking likely that the backbone of our heating system for the ECal detector will be 12.5 amp 0-48VDC dimmable LED drivers made by Meanwell HLG-600H-48B. Here is a picture of one of the units.
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<img class="x_x_ContentPasted1 x_x_w-1294 x_x_h-1706" id="x_x_imageSelected0" width="462" height="610" size="3429967" style="max-width:100%; width:462.583px; height:610px" data-outlook-trace="F:3|T:3" src="cid:b517aa41-2b30-4d07-9272-0ddb01742215"></div>
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<span class="x_x_ContentPasted2" style="display:inline!important; background-color:rgb(255,255,255)">Can you take a look to make sure these are approved by one of the appropriate Labs like UL? I see safety standards are listed on page2 of the documentation
and UL is listed for some, but I don't know which UL standards are critical. </span>Documentation is available here: <a href="https://www.trcelectronics.com/ecomm/pdf/hlg600h.pdf" id="LPlnk651891" style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt">https://www.trcelectronics.com/ecomm/pdf/hlg600h.pdf</a></div>
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We would be using around 45 to 50 of these.</div>
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-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>
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Newport News, VA</div>
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