Thanks a lot for the information. Few days ago I made the changes in the skin.conf as Gary suggested, but first there was no change in the displayed value of weewx visible, although I restarted the weewx process. After a while the pressure is displayed correct now. In addition I adjusted the absolute pressure in the station accordung to the present values of a nearby weatherstation at the airport. So everything works fine. Thank you also very much for your support.
br Alex gszla...@gmail.com schrieb am Dienstag, 15. April 2025 um 21:04:11 UTC+2: > There are two sea level pressures. One is QNH (Altimeter setting) and the > other is MSLP. > > Although WeeWX calculates both sea level pressures, the one that is > displayed on the default Seasons skin is MSLP.(Mean Sea Level Pressure). > WeeWX displays MSLP as "Barometer". > > MSLP is indeed, calculated from your station pressure. and converts your > station pressure to an equivalent pressure at sea level. > Therefore at 360 m elevation and station pressure of 1020, WeeWX appears > to be calculating MSLP correctly of about 1064 hPa.(depending on outside > temperatures). > > However, a MSLP = 1064 sounds like an unrealistically high pressure . In > reading your weather station manual, it lloks like you can manually set > your relative pressure to a calibrated pressure source like a close-by > airport < 25 km. . > > If your current relative pressure does not match QNH or Altimeter setting, > then your station pressure could be inaccurate. If it is out, set your > relative pressure to be the same as the airport Altimeter setting or QNH > then subtract the offset of 45 hPa (44.7) to calculate your station > pressure (QFE).Unfortunately, I did not find the procedure to adjust your > station pressure in the manual. > > You will have to check the accuracy of your barometer and re-calibrate if > necessary. I would recommend that you refer to the barometer wiki for more > specific guidance regarding calibration. Although the wiki is intended for > Ecowitt weather stations, the same principles apply to all weather > stations. Go to www.barometer-wiki.ca/barometer and see the Archive > section for "fixed offset" weather stations.. > > Good luck and let us know how it goes... > On Thursday, April 10, 2025 at 5:40:10 AM UTC-4 Alex Z99 wrote: > >> I deploy the weewx version 5.1.0 an station ist WS2816 (Technoline). >> Altitude is 360 m above sealevel. It is defined in the section [Station] >> in weewx.conf, but the difference between station value and displayed value >> at index.html of weewx is about 45 mBar. >> For example: The pressure value from station is 1020 mBar, This value is >> also transfered via mqtt to my broker, but at the index page with version: >> Seasons 5.0.2 >> it appears 1064 mBar which seem to be the pressure at sealevel. >> I tried to fix that issue with correction in the section [StdCalibrate], >> but that did not work. >> It seem that weewx displays the calculated barometer value from the real >> pressure value from station. >> I have no idea how to fix that issue, any idea? >> >> br >> >> Alex >> > -- 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. To view this discussion visit https://groups.google.com/d/msgid/weewx-user/aca21fc1-6391-4a4e-997c-c61e423f5b4bn%40googlegroups.com.
