Calibrating atmospheric pressure
Posted: 19.07.2022 00:41
The readings on my Aranet4 are not accurate for air pressure. The unit is currently showing 27.67 inHg, while my weather station (and the local airport ATIS) are both showing 29.98 inHg.
Is there any way to calibrate the unit?
Posted: 19.07.2022 09:54
Aranet4 atmospheric pressure sensor can't be calibrated. Would you please send the photos or screenshots of Aranet4 and your weather station atmospheric pressure data to firstname.lastname@example.org for troubleshooting?
Posted: 05.09.2022 08:30
There seems to be a disconnect in the understanding of "barometric pressure". The pressure we all refer to when discussing the weather. This "pressure" is normalized to sea level. If you are not at sea level then you must add a correction factor to the air pressure that is measured.
If the Aranet4 is reading air pressure accuratly then an altitude correction must be done to give "barometric pressure". Without this correction the number on the app is the air pressure.
Using my iphone as a reference, both the iphone and the Aranet4 read within 0.06 in. of mercury air pressure. The iphone then corrects for the altitude of your location to give "barometric pressure", in good agreement with local weather stations. This is not possible with the Aranet4, so the number displayed is absolute "air pressure", uncorrected to give "barometric pressure".
If the app allowed the user to enter an altitude, then the pressure reading could be corrected.
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