<div dir="ltr"><div>Hello Brian, <br></div><div> I just finished trying "raising the 'Intlk - Prg - Fill Press' to 60 and the Auto to 59. It takes in total for the 3 cycles and the fill about 24 minutes, which is totally fine. <br></div><div><br></div><div>Thanks Brian. <br> </div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, Feb 18, 2020 at 11:47 AM Brian Eng <<a href="mailto:beng@jlab.org">beng@jlab.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Regarding the entry at 20:04 in the shift summary: <a href="https://logbooks.jlab.org/entry/3784528" rel="noreferrer" target="_blank">https://logbooks.jlab.org/entry/3784528</a><br>
And the entry it links to: <a href="https://logbooks.jlab.org/entry/3784646" rel="noreferrer" target="_blank">https://logbooks.jlab.org/entry/3784646</a><br>
<br>
This was caused by the flow through MFC104 interlock when in Auto mode. What happened was that the fill pressure was lowered enough that when the Purge - Fill cycle was complete and it would go back into Auto mode that interlock would be tripped and go into failure mode (which empties the target).<br>
<br>
There's a few "workarounds" to this:<br>
<br>
1. Raise the 'Intlk - Auto - Max Flow' value to 250 (which will disable the interlock) until the purge is completed _AND_ the pressure in the target has stabilized in Auto mode after which return it back to its nominal value (to re-enable the interlock).<br>
<br>
2. Raise the 'Intlk - Prg - Fill Press' value to be closer to the final pressure so that the flow will have already dropped below the flow interlock when it switches back to Auto mode. I suspect this will increase the purge time which is why it was lowered in the first place.<br>
<br>
<br>
<br>
Hopefully that explains what was going on.<br>
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</blockquote></div><br clear="all"><br>-- <br><div dir="ltr" class="gmail_signature">Best regards,<br>Mohammad Hattawy.<br></div>