Brian replied to the topic '[QHY] Cooling/warming time (ramp)' in the forum. 4 years ago

I've been trying to find some actual data on the subject but all I've found so far is recommendations to raise temperature "gradually" to avoid thermal shock. This is from the QHY163m manual:

>9. How to protect the cooler in QHY163M?
The cooler in QHY163M can lower the CMOS temperature to a value that’s almost 40 degrees centigrade below the ambient temperature. So you need to be careful to avoid thermal shock, which refers to when the cooler’s temperature rises or fall dramatically, the cooler is subjected to strong internal stress due to contraction principle. Drastic thermal shock can shorten cooler’s service life or permanently break it.
So when you begin to adjust the CMOS temperature, you should avoid setting “Cooler Power” to its maximum value, and you should gradually turn up the “Cooler Power” value. When you turn off the power, if the “Cooler Power” value is very big, you should gradually turn it down before turn off the power.


I also read that ZWO camera firmware has a built in 5minute period.

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