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-693 Instrument control development <p>For when power is lost and/or communication to the piepan is cut off we need an independent warmup routine in the temperature board. Steve Hope will flesh out the specification and attach it to this ticket. But roughly speaking there will be some criterion for the board to decide on its own that it needs to keep the detector safe (some combo of loss of power, loss of networking, loss of keepalive commands, etc), and a simple procedure to follow at that point (for example: turn off PID loops, slow down sampling, switch to maintaining a 1-2K diff between a detector sensor and some other one). As simple and robust as is possible.</p> <p>This also requires the PCM to power things off, in order to minimize load on PFS and SM UPSes, so that heater power can me maintained as long as possible.</p> INSTRM-693

Add autonomous warmup routine.

Task Normal Done Done cloomis cloomis SPS Tue, 9 Jul 2019 14:52:57 +0000 Wed, 8 Mar 2023 23:16:39 +0000 Wed, 8 Mar 2023 23:16:39 +0000 ics_xcu_smb 0 2 <p>Passive warmup conducted today at LAM reveals that the detector temperature is approx 10K higher than that of the surrounding hardware. So while the aim is to still implement an autonomous warmup mechanism to ensure that the detector temperature is approx 20K higher, this ticket is no longer regarded as highest priority for pre-shipping.</p> <p>After watching the visible and NIR cryostat warmups we have implemented something a fair bit simpler. The SMB heater loop compares the detector temp to the coldest temp, and if closer than 3K (by default, and settable) changes the set point.</p> <p>Tagged 1.5.0</p> Duplicate INSTRM-755 Development Rank 0|02qpuc:i6001gtpi9 Sprint SM1-2019 N SM1-2019 O Story Points 4.0