Quote:
Originally Posted by glend
That's impressive Peter. I might try the cooler box before I install a cold finger. Do you have any desicant or dew prevention measures inside the box? Condensation mangement is a major issue with the cold finger and likely requires a low pass filter heater.
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Hi Glen.
No I don't. 2 reasons.
1. I have a small hole in each of the lower back corners to drain off any condensation that might pool inside the box;
2. With the operating camera sensor running at 10C above chamber temperature, I figure I am unlikely to experience "on-the-chip" condensation if I maintain a temp range of 5-10 inside the box. Hope I'm right about this.
I base this on the formula:
Td = T - ((100 - RH)/5.)
where Td is dew point temperature (in degrees Celsius), T is observed temperature (in degrees Celsius), and RH is relative humidity (in percent). Apparently this relationship is fairly accurate for relative humidity values above 50%
On that basis, the dew point last night when relative humidity was 55-60% i.e.:
Td = 16-((100-60)/5)
Peter