<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=us-ascii">
</head>
<body dir="auto">
<div>Vito:</div>
<div><br>
</div>
<div>If I am not mistaken all of our hoods and wet benches are interlocked in some fashion. However, I think that each may be interlocked in a slightly different fashion. Here is a summary of various things that we use … but we definitely DO NOT interlock DI
spray guns or goosenecks that might be needed or used in an acid spill/exposure situation. </div>
<div><br>
</div>
<div>For hot pots, we typically tie the interlock into the pneumatic low-level detector. If the hot pot thinks the level is too low, it won't heat. </div>
<div><br>
</div>
<div>For hot plates, we typically just shut off AC power with a high-current interlock. </div>
<div><br>
</div>
<div>For spin coaters, putting the interlock in the chuck vacuum sense circuit is often effective. No vacuum on the chuck means no spin …</div>
<div><br>
</div>
<div>We often interlock the SRD associated with a bench. I can't remember for certain, but I think that we disable the start switch which doesn't defeat a periodically timed cycle of an inactive SRD. </div>
<div><br>
</div>
<div>In some cases, turning off the light in the good helps discourage use. </div>
<div><br>
</div>
<div>I expect that others will have different approaches, but this should be a start. </div>
<div><br>
</div>
<div>Thanks,</div>
<div><br>
John
<div><br>
</div>
<div>Sent from my iPhone</div>
</div>
<div><br>
On Sep 16, 2015, at 10:52 AM, "Vito Logiudice" <<a href="mailto:vito.logiudice@uwaterloo.ca">vito.logiudice@uwaterloo.ca</a>> wrote:<br>
<br>
</div>
<blockquote type="cite">
<div>
<div>Dear Colleagues,</div>
<div><br>
</div>
<div>Our efforts to physically interlock our tools via our lab management platform (Badger in our case) is progressing well. In most cases we are interlocking computer monitors, keyboards or computer mice with good results. </div>
<div><br>
</div>
<div>My team and I have discussed how to best interlock our numerous fume hoods but were unable to settle on any one approach. For safety reasons we certainly do not want to make the hoods entirely unavailable when not enabled by Badger; ie., we want to encourage
their use when lab users handle chemicals. However we do believe it would be beneficial to physically interlock them in some fashion to at least make them somewhat less appealing to use unless they are first enabled. I’ve searched past threads on this fantastic
network and while I came across some great related discussions I was unable to find anything which dealt specifically with hood interlocks. </div>
<div><br>
</div>
<div>I’d greatly appreciate hearing from those of you whom have interlocked your hoods or are thinking of doing so soon. I’m curious to know what service or feature you may have tapped into on a typical hood setup that might include some combination of spin-coaters,
hot plates, heated/recirculating chemical baths, N2 guns, DI guns etc.</div>
<div><br>
</div>
<div>Thanks very much for any insights.</div>
<div><br>
</div>
<div>Best regards,</div>
<div>Vito</div>
<div>
<div><font class="Apple-style-span" color="#000000"><font class="Apple-style-span" face="Calibri" style="font-size: 14px; "><font face="Calibri,sans-serif">--</font></font></font></div>
<div><font class="Apple-style-span" color="#000000"><font class="Apple-style-span" face="Calibri" style="font-size: 14px; "><font face="Calibri,sans-serif">Vito Logiudice </font>P.<font face="Calibri,sans-serif">Eng.</font></font></font></div>
<div><font class="Apple-style-span" color="#000000"><font class="Apple-style-span" face="Calibri"><font face="Calibri,sans-serif" style="font-size: 14px; ">Director of Operations, Quantum NanoFab</font></font></font></div>
<div><font class="Apple-style-span" color="#000000"><font class="Apple-style-span" face="Calibri"><font face="Calibri,sans-serif" style="font-size: 14px; ">University of Waterloo</font></font></font></div>
<div><font class="Apple-style-span" color="#000000"><font class="Apple-style-span" face="Calibri"><font face="Calibri,sans-serif" style="font-size: 14px; ">Lazaridis QNC 1207</font></font></font></div>
<div><font class="Apple-style-span" color="#000000"><font class="Apple-style-span" face="Calibri"><font face="Calibri,sans-serif" style="font-size: 14px; ">200 University Avenue West</font></font></font></div>
<div><font class="Apple-style-span" color="#000000"><font class="Apple-style-span" face="Calibri"><font face="Calibri,sans-serif" style="font-size: 14px; ">Waterloo, ON Canada N2L 3G1</font></font></font></div>
<div><font class="Apple-style-span" color="#000000"><font class="Apple-style-span" face="Calibri"><font face="Calibri,sans-serif" style="font-size: 14px; ">Tel.: (519) 888-4567 ext. 38703</font></font></font></div>
<div><span style="font-size: 14px; ">Email: <a href="mailto:vito.logiudice@uwaterloo.ca">vito.logiudice@uwaterloo.ca</a></span></div>
<div><span style="font-size: 14px; ">Website: </span><a href="https://fab.qnc.uwaterloo.ca">https://fab.qnc.uwaterloo.ca</a></div>
<div><br>
</div>
</div>
</div>
</blockquote>
<blockquote type="cite">
<div><span>_______________________________________________</span><br>
<span>labnetwork mailing list</span><br>
<span><a href="mailto:labnetwork@mtl.mit.edu">labnetwork@mtl.mit.edu</a></span><br>
<span><a href="https://www-mtl.mit.edu/mailman/listinfo.cgi/labnetwork">https://www-mtl.mit.edu/mailman/listinfo.cgi/labnetwork</a></span><br>
</div>
</blockquote>
</body>
</html>