๐๐๐ Il 28 giu 2017 7:57 PM, "Thomas Keffer" <[email protected]> ha scritto:
> Hello, > > If you look in the driver, you'll see this note: > > Illuminance and Radiation > > The 30xx stations include a sensor that reports illuminance (lux). The > conversion from lux to radiation is a function of the angle of the sun and > altitude, but this driver uses a single multiplier as an approximation. > > Apparently the display on fine offset stations is incorrect. The display > reports radiation with a lux-to-W/m^2 multiplier of 0.001464. Apparently > Cumulus and WeatherDisplay use a multiplier of 0.0079. The multiplier for > sea level with sun directly overhead is 0.01075. > > This driver uses the sea level multiplier of 0.01075. Use an entry in > StdCalibrate to adjust this for your location and altitude. > > > The ratio of multipliers is 0.01075 / 0.001464 or 7.34. > > This is the same as the ratio of the values: 93 / 12.7 = 7.32. > > So, the difference is entirely due to the different multipliers used. > > -tk > > > On Wed, Jun 28, 2017 at 10:17 AM, Massimiliano Neri <[email protected]> > wrote: > >> >> Tom, can I ask you how to calculate solar radiation? I on the console for >> example I have these three readings: >> - 809 in Fc >> - 8.70 in Klux >> - 12.7 in W/M2 >> >> Why did I find the value converted to 93 W/M2? >> >> >> Il giorno martedรฌ 27 giugno 2017 22:34:45 UTC+2, Massimiliano Neri ha >> scritto: >> >>> Hello... >>> >>> I have a FineOffset (Froggit) WH3080 connected with weewx. I would like >>> to know how the software calculates the relative pressure from the absolute >>> pressure. In fact I found that weewx calculates me at least 2hpa more than >>> the weather stations in my area .... >>> Can anyone tell me if you can take the relative pressure from the wh3080 >>> console? >>> >> -- >> 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 [email protected]. >> For more options, visit https://groups.google.com/d/optout. >> > > -- > You received this message because you are subscribed to a topic in the > Google Groups "weewx-user" group. > To unsubscribe from this topic, visit https://groups.google.com/d/ > topic/weewx-user/vDJfJH0AkRk/unsubscribe. > To unsubscribe from this group and all its topics, send an email to > [email protected]. > For more options, visit https://groups.google.com/d/optout. > -- 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 [email protected]. For more options, visit https://groups.google.com/d/optout.
