yes - why not calibrate your console first
when you see that the offset between absolute and relative pressure for
your location used is wrong, just adjust it 😎
the the first basic step I'd say
even though, when your absolute (=local) pressure reading is correct,
and your have the weewx option in weewx.conf set to software, weewx
should calculate the proper relative value (taking into account the
average temperature of the past 12 hours afaik).
"When calculated by Weewx itself ("software" option enabled in
weewx.conf), my weather station shows 1001 hPa - still too low. " - I
guess what you want to say is not that your station shows too low a
value, but that weewx caluclates too low a value for your station (these
are two different things) - your station will continue to show what its
reads and what it is calibrated for. Weewx has no feedback to you station.
On 30.08.2023 20:21, Tomasz Lewicki wrote:
I'm trying to sort out barometer and pressure values. I own HP1001
clone. Internal T/H/P sensor was calibrated with my friends certified
barometer before. Currently it sensor shows absolute pressure value
936,7 hPa and it almost perfectly (+/- 1 hPa) aligns with very
accurate numerical forecast for my location. Same meteogram show also
relative pressure 1007 (+/- 1 hPa) for my location. METAR for nearby
(43 km) airport shows 1008 hPa.
Relative pressure displayed by my HP1001 is about 20 hPa higher than
absolute - obviously too low value because I'm located about 550 m AMSL.
When calculated by Weewx itself ("software" option enabled in
weewx.conf), my weather station shows 1001 hPa - still too low. Of
course I checked location setting and AMSL value and unit - in my
opinion they are properly set. Should I change something in weather
station settings? I can set only coordinates, not the AMSL height.
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