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-1825 Instrument control development <p>This was on nir-sn1 (n2 at LAM) when starting turbo pump:</p> <div class="preformatted panel" style="border-width: 1px;"><div class="preformattedContent panelContent"> <pre>-=1471, PFS: XCU_N2 PCM bus 2 input voltage =- 2022-12-16 09:26:27 24V-AUX Input power is failing: 22.8V !</pre> </div></div> <p>how can we deal with that ?</p> <p> </p> INSTRM-1825

pcm voltage alerts when starting turbo

Bug Normal Done Done arnaud.lefur fmadec EngRun SPS Fri, 16 Dec 2022 09:29:19 +0000 Wed, 30 Aug 2023 21:45:51 +0000 Wed, 30 Aug 2023 21:45:38 +0000 ics_alertsActor 0 2 <p>I'm surprised you have not seen this before – as far as I can tell it happens on most cryostats. The turbo simply pulls enough current to make the  PCM input power drop for a while.</p> <p>Slightly gross, but the alerts actor could look at the turbo speed, and muffle the error if 0 &lt; rpm &lt; 90000. Not sure I would want to be more clever than that. Maybe add one sample of history and require that it be speeding up before blocking an alarm?</p> <p>I did , but did not reported it !</p> <p>so right after it reported:</p> <div class="preformatted panel" style="border-width: 1px;"><div class="preformattedContent panelContent"> <pre>-=1471, PFS: XCU_N2 PCM bus 2 input voltage =- 2022-12-16 09:29:57 24V-AUX Input power is failing: 23.9V !</pre> </div></div> <p>then later</p> <div class="preformatted panel" style="border-width: 1px;"><div class="preformattedContent panelContent"> <pre>-=1471, PFS: XCU_N2 PCM bus 2 input voltage =- 2022-12-16 10:10:27 24V-AUX Input power is failing: 23.85V !</pre> </div></div> <p>so I had to deactivate the alert, which is not good if this alert really matter</p> <p>of course one can claim that this issue may disappear if we perform a passive warmup...</p> <p>Twice, then? So not during the turbo acceleration. Will ask Hope whether we should lower the threshold.</p> <p>yes, during turbo acceleration but also after</p> <p>merged as alertsActor:1.6.1</p> Development Rank 0|02qph7:0hs Sprint Eng13Oct Story Points 1.0