[weewx-user] Re: HP 1000 and UV-Index
Hello Susan, Thanks for the answer. I am experimenting with the "StdCalibrate" section in the weewx.conf. A comparison of the reported values with the UV index according to the console showed the following: 0 = uv <= 100 uW / cm² 1 = uv> 100 uW / cm² <= 450 uW / cm² 2 = uv> 450 uW / cm² <= 900 uW / cm² 3 = uv> 900 uW / cm² <1350uW / cm² So I entered the formula UV = (UV - 100) / 450 + 1 in the Calibrate section. But I will also test it with UV = UV / 256. At the latest in the summer I will have found out, if then the values with the values in the Conole agree. Many Thanks Martin -- You received this message because you are subscribed to the Google Groups "weewx-user" group. To unsubscribe from this group and stop receiving emails from it, send an email to weewx-user+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
[weewx-user] Re: HP 1000 and UV-Index
In my HP1000 weewx driver, I use the formula (in Python) int(round(data_value)/256) where data_value is the value I read directly from the device itself. The resulting values seem to match those displayed on the console itself. Susan -- You received this message because you are subscribed to the Google Groups "weewx-user" group. To unsubscribe from this group and stop receiving emails from it, send an email to weewx-user+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
[weewx-user] Re: HP 1000 and UV-Index
Hello Vince, Thanks for the answer. I think it's not easy to convert. In your link, I read, "The index is equal to the EAS-weighted irradiance (in watts / m²) x 40. An index of 10 corresponds to an EAS-weighted irradiance of 0.25 W / m², but if I convert my values this does not fit the index on the display of the station. At least I think it's easier to adjust the charts and live with the reported values ... Martin -- You received this message because you are subscribed to the Google Groups "weewx-user" group. To unsubscribe from this group and stop receiving emails from it, send an email to weewx-user+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
[weewx-user] Re: HP 1000 and UV-Index
On Saturday, March 10, 2018 at 9:29:11 AM UTC-8, RothMa wrote: > > How can I calculate from uW per square centimeter to "UV Index" and how > can I configure weewx for it? > > Some quick googling seems to say it might be a little complicated, but I did find one Davis link that might help... Does https://www.davisnet.com/product_documents/weather/app_notes/93004_306-AN_06-interpret-uv-readings.pdf help any ? -- You received this message because you are subscribed to the Google Groups "weewx-user" group. To unsubscribe from this group and stop receiving emails from it, send an email to weewx-user+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
