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Old 18-02-2025, 08:56 PM
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pmrid (Peter)
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Temperature control on ASI2600MC Pro

I'm a bit concerned about my new 2600MC - in particular the amount of power it is drawing to cool. I've set it to -10C and the ambient is presently about 20C. ASIAIR shows it reaching the set temp OK but at 100%. All my other ASI ccds seem to operate at around 45-55% most of the time. I have run it powered by the ASIAIR and also on its own power supply but the result is the same.

The specs claim that the device can cool to 35C below ambient So I suppose I can't omplain too much. Even so, .could any other 2600MC user share their own experiences please?

Last edited by pmrid; 18-02-2025 at 11:56 PM.
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Old 19-02-2025, 08:59 AM
Dave882 (David)
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Hi Peter- I use the 2600MC and ASIAIR and can generally get the full -35deg but the cooler is running pretty hard to do it - at least 90%. There's a few summer nights here above 25C where I can't get to -10C and have to settle on -5C. There seems to be a glitch with my camera where if the cooler maxes out to 100% it just stops cooling altogether and I need to turn the cooler off and on again to reset. This messed up my last image of the Christmas Tree Cluster actually.

I should mention that air-flow and humidity also seems to have an effect. For instance, when I'm using the hyperstar and the camera is inside the dewshield it needs to work harder to cool.
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Old 19-02-2025, 04:55 PM
Startrek (Martin)
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I’ve had my 2600MC for 4 years and my 2600MM for 18 months
I use APT to run these cameras and it provides the following data on the operation and status of the cooler
1/ Power consumption in %
2/ Cooling capacity in %
3/ Camera sensor temperature in Deg C
4/ Initial start up temperature of sensor

Both cameras have always been set to -10C ( no need to go any cooler )

My 2600MC in summer cools down to -10C from a starting temperature of approximately 22C to 25C ( power consumption sits at 100% , cooling capacity sits at 75% to 85% )
In winter it cools down to -10C from a starting temperature of approximately 12C to 16C. ( Power consumption sits at 100% , cooling capacity sits at 25% to 35%)

My 2600MM cooler performs slightly better than the 2600MC as it’s a newer camera.

Hope the above is helpful

Martin
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Old 20-02-2025, 10:38 AM
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pmrid (Peter)
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Thank you David and Martin.

I'm curious about the relationship between power consumption and cooling capacity.

Being a captive of the ASI ethos, I have not encountered the latter concept but assume there must be a straight linear relationship but of course that does not factor in possible variables such as humidity, wind speed and no doubt others I haven't grasped. Always ready to admit ignorance and happy to be educated.
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Old 21-02-2025, 04:45 PM
Startrek (Martin)
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Quote:
Originally Posted by pmrid View Post
Thank you David and Martin.

I'm curious about the relationship between power consumption and cooling capacity.

Being a captive of the ASI ethos, I have not encountered the latter concept but assume there must be a straight linear relationship but of course that does not factor in possible variables such as humidity, wind speed and no doubt others I haven't grasped. Always ready to admit ignorance and happy to be educated.

Some more feedback……,
After my 2600 is connected and I commence cooling , I glance at the dashboard in APT and notice the power consumption increasing a lot faster than cooling capacity. The start temperature doesn’t drop immediately, it starts dropping once the power consumption is up to say 30% and the cooling capacity is around 10%. This can take up to a minute or so. So power consumption and cooling capacity are not linear or proportional to one another. In Winter , obviously the temperature starts dropping significantly quicker than in Summer.
The power consumption always hits 100% all year round, whereas cooling capacity only reaches say 25% to 35% in Winter to maintain cooling at -10C and in Summer reaches as high as 85% to maintain cooling at -10C.
My 4 year old 2600MC is definitely less efficient in cooling than my 18month old 2600MM.
If fact the 2600MC struggles to maintain a temperature of -10C during hot summer nights and that’s with power consumption at 100% and cooling capacity close to 90%.
The cooling capacity has never gone beyond 90% , it gets to 89% and the camera temp starts dropping to 9.9C or 9.8C , sometimes as low as even 9.0C.
Looks like cooling performance deteriorates with age ?

I’m not quite sure why these ASIair thingys don’t provide more specific data on the cooling of your camera. I don’t use these little red boxes. My imaging aquisition set up uses 5 independent pieces of software.

Martin
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Old 21-02-2025, 10:00 PM
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pmrid (Peter)
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I have never pulled an ASI apart to see but assuming the basic cooling mechanism is a peltier device mounted on a metallic block with fins and fans I suppose there is a degree of latency while the cooler brings the metal block to some sort of base temp. And then, I assume there is a tendency to overshoot the target and vice versa so temps will tend to move in a range under and over the target.

Peter
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