https://pfspipe.ipmu.jp/jira This file is an XML representation of an issue en-us 8.3.4 803005 13-09-2019 https://pfspipe.ipmu.jp/jira/browse/INSTRM-869 Instrument control development <p>We added a shutdown trigger for the ion pumps in <a href="https://pfspipe.ipmu.jp/jira/browse/INSTRM-772" title="Shutdown ion pump when high pressure threshold hit." class="issue-link" data-issue-key="INSTRM-772"><del>INSTRM-772</del></a>. That has a buffer to get past startup impulses, but we also get spikes when, e.g. the gatevalve is opened or the other pump started.</p> <p>I do not like the idea of always ignoring 60s spikes, and think we should add a mechanism to temporarily pause or modify the shutdown trigger. Could be started when the cooler, gatevalve, or ionpump state is changed.</p> INSTRM-869

Arrange for the ionpump pressure rise alarm/shutdown to be ignored.

Task Normal Won't Fix Won't Fix cloomis cloomis SPS Thu, 19 Dec 2019 01:59:41 +0000 Fri, 28 Jul 2023 07:45:50 +0000 Fri, 28 Jul 2023 07:45:50 +0000 0 2 <p><a href="https://pfspipe.ipmu.jp/jira/secure/ViewProfile.jspa?name=arnaud.lefur" class="user-hover" rel="arnaud.lefur">arnaud.lefur</a> <a href="https://pfspipe.ipmu.jp/jira/secure/ViewProfile.jspa?name=fmadec" class="user-hover" rel="fmadec">fmadec</a> How about this:</p> <ul class="alternate" type="square"> <li>use the same mechanism which is used to ignore turn on spikes: a config.ionpump.spikeDelay window inside which we warn but do not reject readings above config.ionpump.maxPressure. The default values are currently 300s and 3e-5 Torr.</li> <li>when the gatevalve is opened, restart that window.</li> <li>or when an <tt>ionpump allowSpikes</tt> command is sent, restart that window.</li> </ul> <p>On further reflection, I wonder if we should have soft and hard limits, where we always turn off the pumps when the hard limit is hit. 5e-4 Torr or so?</p> <p>Do we have useful data on these spikes? How high, how long, etc.?</p> <p>I don't know if it is the right place but:</p> <p>here are some plots of the b2 ionpump stop</p> <p> </p> <p><span class="image-wrap" style=""><img src="https://pfspipe.ipmu.jp/jira/secure/attachment/12804/12804_sm2_b2_ionpumps_stop_20200722.png" style="border: 0px solid black" /></span><span class="image-wrap" style=""><img src="https://pfspipe.ipmu.jp/jira/secure/attachment/12805/12805_sm2_b2_ionpumps_stop_20200619_3.png" style="border: 0px solid black" /></span></p> <p>Superseded by <a href="https://pfspipe.ipmu.jp/jira/browse/INSTRM-2050" title="Make pressure alarms and control more robust" class="issue-link" data-issue-key="INSTRM-2050">INSTRM-2050</a></p> Relates INSTRM-772 Development Rank 0|02qppn:k Sprint SM1PD-2020 A SM1PD-2020 B SM1PD-2020 C SM1PD-2020 K Story Points 4.0