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solar & uv sensor

Discussion specific to Davis weather stations
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beelzebubs
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solar & uv sensor

Post by beelzebubs »

I bought a solar and uv sensor and I just wonder if I need to do any settings for these in the console or is it just to mount them up and connect them in?
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steve
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Re: solar & uv sensor

Post by steve »

The instructions don't mention anything about the console (other than viewing the values to test), and I don't remember having to do anything when I added my solar sensor, so I think they 'just work'.
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beelzebubs
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Re: solar & uv sensor

Post by beelzebubs »

Ok, thanks i'll give it a try and see what happens.
BigOkie
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Re: solar & uv sensor

Post by BigOkie »

beelzebubs wrote:Ok, thanks i'll give it a try and see what happens.
Don't expect instant readings. Usually takes around 60 seconds to get a reading from both of those sensors after they're plugged into the ISS.
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mcrossley
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Re: solar & uv sensor

Post by mcrossley »

Even longer if it's dark iirc.
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Re: solar & uv sensor

Post by Touchtone »

BigOkie wrote:
beelzebubs wrote:Ok, thanks i'll give it a try and see what happens.
Don't expect instant readings. Usually takes around 60 seconds to get a reading from both of those sensors after they're plugged into the ISS.
The UV & Solar sensors only update every minute, which is the normal update interval for these units.
BigOkie
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Re: solar & uv sensor

Post by BigOkie »

mcrossley wrote:Even longer if it's dark iirc.
Every five minutes when it's dark. Which is why sometimes you'll see a sudden jump on your UV meter. At least I do. I have some trees in the eastern horizon that aren't incredibly tall, but I do see a jump directly to 0.5 almost every morning.
prodata
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Re: solar & uv sensor

Post by prodata »

BigOkie wrote:
mcrossley wrote:Even longer if it's dark iirc.
Every five minutes when it's dark. Which is why sometimes you'll see a sudden jump on your UV meter. At least I do. I have some trees in the eastern horizon that aren't incredibly tall, but I do see a jump directly to 0.5 almost every morning.
There's a minimum threshold reading on the UV sensor. Can't recall without checking exactly what it is, but it could well be 0.5.

(Apparently UV is quite a tricky/noisy sensor for the SIM circuitry to read accurately and in the past various users were perturbed by non-zero readings overnight. The fix was to set a threshold value below which the reading is treated as zero. Not sure I'd agree that this was the best solution but a few users were very vocal in their dislike of non-zero overnight readings and this is the consequence.)
John Dann
Prodata Weather Systems
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http://www.weatherstations.co.uk
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mcrossley
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Re: solar & uv sensor

Post by mcrossley »

The min UV reading is indeed 0.5
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