[INSTRM-1825] pcm voltage alerts when starting turbo Created: 16/Dec/22 Updated: 31/Aug/23 Resolved: 31/Aug/23 |
|
| Status: | Done |
| Project: | Instrument control development |
| Component/s: | ics_alertsActor |
| Affects Version/s: | None |
| Fix Version/s: | None |
| Type: | Bug | Priority: | Normal |
| Reporter: | fmadec | Assignee: | arnaud.lefur |
| Resolution: | Done | Votes: | 0 |
| Labels: | EngRun, SPS | ||
| Remaining Estimate: | Not Specified | ||
| Time Spent: | Not Specified | ||
| Original Estimate: | Not Specified | ||
| Story Points: | 1 |
| Sprint: | Eng13Oct |
| Description |
|
This was on nir-sn1 (n2 at LAM) when starting turbo pump: -=1471, PFS: XCU_N2 PCM bus 2 input voltage =- 2022-12-16 09:26:27 24V-AUX Input power is failing: 22.8V ! how can we deal with that ?
|
| Comments |
| Comment by cloomis [ 16/Dec/22 ] |
|
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. Slightly gross, but the alerts actor could look at the turbo speed, and muffle the error if 0 < rpm < 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? |
| Comment by fmadec [ 19/Dec/22 ] |
|
I did , but did not reported it ! so right after it reported: -=1471, PFS: XCU_N2 PCM bus 2 input voltage =- 2022-12-16 09:29:57 24V-AUX Input power is failing: 23.9V ! then later -=1471, PFS: XCU_N2 PCM bus 2 input voltage =- 2022-12-16 10:10:27 24V-AUX Input power is failing: 23.85V ! so I had to deactivate the alert, which is not good if this alert really matter of course one can claim that this issue may disappear if we perform a passive warmup... |
| Comment by cloomis [ 20/Dec/22 ] |
|
Twice, then? So not during the turbo acceleration. Will ask Hope whether we should lower the threshold. |
| Comment by fmadec [ 20/Dec/22 ] |
|
yes, during turbo acceleration but also after |
| Comment by arnaud.lefur [ 31/Aug/23 ] |
|
merged as alertsActor:1.6.1 |