--Hmm..if Absolute pressure and relative pressure = 0 (zero) your barometer was not set up correctly and not calibrated correctly. II absolute pressure = 0, you would be living in a vacuum! Or are you referring to both offsets = 0?
Your station is the weathersleuth IP? If so, you have an outside array, a Wi-Fi gateway and a separate LCD indoor sensor with a barometer sensor: Thermo-hygrometer-barometer transmitter (temperature/humidity/pressure). If your barometer is working, it should be reading the current atmospheric pressure at your elevation (the elevation of your barometer). In your calibration screen, you should see an absolute pressure offset and a relative pressure offset. These fields are used to adjust your absolute pressure and relative pressure, respectively. It is best to start over from scratch. Set both offsets back to zero in the calibration screen. Verify that the pressure showing on the LCD screen of the external Thermo-hygrometer-barometer transmitter is equal to the absolute pressure on your console. Maybe it's under the Live data tab? You will have to calculate your relative pressure offset which depends on your elevation. Your weather station appears to be similar to an Ecowitt or Ambient weather station therefore calibration procedures should be the same. Read the barometer wiki to set your elevation and calibrate your barometer: http://meshka.eu/Ecowitt/dokuwiki/doku.php?id=barometer#calibration_wi-fi_gateways Your other question relates to WeeWX. You definitely do not want to pass on your weather station's REL to WeeWX. Your weather station uses a single fixed offset amount to do an estimate of sea level pressure. It can be a reasonably close approximation but your readings will drift at times. You would be far better off relying on WeeWX "barometer" pressure reading because it uses an actual algorithm to calculate sea level pressure much more accurately. To obtain the WeewX "barometer" reading you do not need to configure anything. WeeWX will automatically calculate "barometer" from your absolute pressure. BTW, the WeeWX "barometer" reading refers to SLP (sea level pressure) that you might see on meteorological isobar charts/surface analysis maps. If you follow the wiki's tutorials, your REL (relative pressure) on your station's console should be an approximation of the Altimeter setting. On Tuesday, October 22, 2024 at 4:43:24 AM UTC-4 Ashley Hinton wrote: > Hi Michael > > Thanks for your reply. > > I did indeed read it which made me realise the issue is what WeeWx is > receiving (in relation to what its displaying on the webpage) & that it > needs to be calibrated somewhere. > I will first calibrate the hardware & then check what value from the > hardware is being displayed on the webpage. I'm pretty certain at the > moment Relative Pressure from hardware = Barometer on the webpage but will > double check so I know in future. > > Thanks again, > > On Monday 21 October 2024 at 04:56:31 UTC+1 [email protected] wrote: > >> Hello, as a first step, did you read the following: >> https://weewx.com/docs/5.1/usersguide/troubleshooting/meteo/ >> >> After that, do you know the pressure mappings console <=> weewx? Then, >> which of the values (pressure, altimeter, barometer) is displayed on the >> webpage? If you know all these things, calibrate your hardware according to >> the manual and choose your desired obs_type to be displayed on the webpage. >> >> >> Ashley Hinton schrieb am Sonntag, 20. Oktober 2024 um 22:08:57 UTC+2: >> >>> Hello >>> >>> I've noticed my Barometer reading is different from other local sources: >>> the airfield just up the road from me, the local weather report, my phone >>> weather app - you name it, my readings did not agree. WeeWx was reporting >>> too high. >>> >>> I'm using an Aercus IP weather station and WeeWx is using the >>> Interceptor driver. >>> The weather station itself has its own calibration settings page, it has >>> two fields for calibrating pressure: >>> >>> Absolute Pressure (was, and is, set to 0) >>> Relative Pressure (was set to 30.00hpa which I'm sure was arbitrary, now >>> set to 0) >>> >>> If I change the Relative Pressure offset the Barometer value reported on >>> the resulting WeeWx-generated webpage changes, so I'm confident that >>> Relative Pressure is what's sent to WeeWx. >>> >>> My question is what to do - calculate and set the calibration in >>> hardware, or in WeeWx? What is generally preferred or considered the best >>> option? >>> >>> Thanks! >>> >>> -- 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]. To view this discussion visit https://groups.google.com/d/msgid/weewx-user/37346858-3fd4-4aec-8dfa-0b820c684de9n%40googlegroups.com.
