Quote:
Originally Posted by Mikesolar
The Sanyo is definitely in the open, where my coil is entirely within a cabinet and only subject to reflected light, if at all. I think the tuning can be made to avoid it but it needs to be quite precise which is why 2 parallel systems might work. Temp measuring to determine turn on and IR to determine when it has defrosted, for example.
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That Sanyo is in the open, but it's installed next to a wall and there is no way
that direct sunlight could get back there and into the sensor.
Sanyo #2 is on the north side of the house and it's even darker behind it.
From what I can tell about indirect sunlight, so far, the
day and night difference in signal voltage levels will be very slight.
A fully inclosed HX like yours is the idea solution to solar pollution..
The sensor spec says
"• Daylight blocking filter • Emitter wavelength: 950 nm"
950 nm isn't in the power band of the sun.. It looks like visible light is where the peak is..
Edit: Found this doc..
http://www.ro.feri.uni-mb.si/predmet...pplication.pdf