Bug 402163 - Cooling of ASI stops 1.5C before target temp (ZWO ASI1600MM Pro)
Summary: Cooling of ASI stops 1.5C before target temp (ZWO ASI1600MM Pro)
Status: RESOLVED WORKSFORME
Alias: None
Product: kstars
Classification: Applications
Component: general (show other bugs)
Version: 2.9.8
Platform: Other Linux
: NOR normal
Target Milestone: ---
Assignee: Jasem Mutlaq
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2018-12-15 18:12 UTC by Tobias
Modified: 2019-01-02 13:41 UTC (History)
1 user (show)

See Also:
Latest Commit:
Version Fixed In:
Sentry Crash Report:

Attachments
Temp setting (202.42 KB, image/png)
2018-12-15 18:12 UTC, Tobias 		Details
after 5 min at 42% power still at 1.5C (191.85 KB, image/png)
2018-12-15 18:13 UTC, Tobias 		Details
after immediate reconnection, real temp is much lower (182.35 KB, image/png)
2018-12-15 18:14 UTC, Tobias 		Details
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Description Tobias 2018-12-15 18:12:46 UTC 
Created attachment 116940 [details]
Temp setting

SUMMARY
Start cooling in CCD Menu. Set to 0°C (or any other Temp x). The temp drops to 1.5°C (or x+1.5°C) displayed in EKOS. However, the temp drops below target uncontrolled (as observed by disconnecting and reconnecting immediately, see screen shot 2)

Temperature control works perfectly under Windows.


STEPS TO REPRODUCE
1. Connect ASI1600MM
2. Set temp to x and press "set"
3. Observe temperature

OBSERVED RESULT
Temp displayed is x+1.5°C

After reconnecting CCD (fast) temp << x (not controlled)

EXPECTED RESULT
Temperature x°C

SOFTWARE/OS VERSIONS
Windows: 
MacOS: 
Linux/KDE Plasma: 
(available in About System)
KDE Plasma Version: 
KDE Frameworks Version: 
Qt Version: 

ADDITIONAL INFORMATION
Comment 1 Tobias 2018-12-15 18:13:41 UTC 
Created attachment 116941 [details]
after 5 min at 42% power still at 1.5C
Comment 2 Tobias 2018-12-15 18:14:20 UTC 
Created attachment 116942 [details]
after immediate reconnection, real temp is much lower
Comment 3 Jasem Mutlaq 2018-12-16 16:28:35 UTC 
I just tested with 178C cooled camera and no problems at all.
Comment 4 Tobias 2018-12-16 20:07:56 UTC 
(In reply to Jasem Mutlaq from comment #3)
> I just tested with 178C cooled camera and no problems at all.

Thank you for your effort!
In the meantime I have checked with ASICAM for Linux and facing the same problem. It has probably something to do with my computer. https://indilib.org/forum/general/4291-help-cooling-of-asi-stops-1-5c-before-target-temp-asi1600mm.html

Best, Tobias