Hi
I was given an old UV sensor that was surplus to the users requirements and fitted it yesterday to my existing Davis VP2 setup. It worked straightaway but the reading I am getting this morning is 5.0 - according to the forecast today UV should be between 0 and 1. Is the sensor faulty or am I reading it wrong or assuming its the same index as the Met office forecast , when its something different ?
Its January, I,m in the UK so would expect any UV level to be very low, even in direct sunlight.
Any thoughts
Thanks
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Latest Cumulus MX V3 release 3.28.6 (build 3283) - 21 March 2024
Cumulus MX V4 beta test release 4.0.0 (build 4021) - 04 May 2024
Legacy Cumulus 1 release 1.9.4 (build 1099) - 28 November 2014
(a patch is available for 1.9.4 build 1099 that extends the date range of drop-down menus to 2030)
Download the Software (Cumulus MX / Cumulus 1 and other related items) from the Wiki
Davis UV Sensor
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- Posts: 786
- Joined: Thu 14 Aug 2008 7:17 am
- Weather Station: Ecowitt GW1003/GW1103/GW2000
- Operating System: Windows 7 and Linux
- Location: Broadstairs, Kent, UK
- Contact:
Re: Davis UV Sensor
I would suggest something is wrong with it. I'm in the UK and at this time of year readings would be very low generating a UVI (UV Index) value of maybe 1 or perhaps 2 in very sunny conditions, I'm not sure what your value of 5 is, if it's a UVI value then it's plain wrong. My current UVI is 0 using my Ecowitt sensor.
A bit more info is really needed as to whether this is a UVI value, and if so it's a duff sensor I'd suspect.
Stuart
A bit more info is really needed as to whether this is a UVI value, and if so it's a duff sensor I'd suspect.
Stuart
- Paul C
- Posts: 538
- Joined: Thu 19 Jun 2008 7:45 am
- Weather Station: Davis VP2 with solar
- Operating System: Windows 10
- Location: Brampton, Cumbria, UK
- Contact:
Re: Davis UV Sensor
It's a proper Davis UV sensor. I see new ones are £400 so it's something I wouldn't be able to afford so when I was given an old one I thought I was in luck.
But, despite me reading the Davis manuals I don't think it says what figure it transmits. So I can only assume its zero to 12 ish. So far I've had zero for night time straight up to 5.0 in bright sunshine this morning.
Perhaps it is a dud
But, despite me reading the Davis manuals I don't think it says what figure it transmits. So I can only assume its zero to 12 ish. So far I've had zero for night time straight up to 5.0 in bright sunshine this morning.
Perhaps it is a dud