Barometer

[Double J Entertainment]

On weatherunderground I was getting 28.95 so I set the StdCalibrate to software for pressure barometer and altimeter now on all the places I upload data I am getting a -- or no pressure or no pressure readings at all. I assume I need to set them back to prefered hardware. But what do I do to callibrate the pressure. That was why I changed them to software I was thinking the software would adjust it.

[Andrew Milner]

One of them must come from hardware!!  Check the user guide for your station type and it will tell you which comes from hardware and which have to be derived in software.

Then use the calibrate to add/subtract whatever you need (in the units of your database)

What is your station type?  What SHOULD the barometric pressure have been (if 28.95 was incorrect)?

[John Jensen]

I have a acurite 01036 it should have been 30.23 inhg at the time I did the change.

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[Andrew Milner]

From the hardware guide pressure is hardware for your station and barometer and altimeter are software derived

So to calibrate you need

[StdCalibrate]

 [[calibrations]]

   pressure = pressure + 1.28

and in StdWxCalculate

[StdWxCalculate]

  [[calculations]]

    pressure = hardware

    barometer = either prefer_hardware or software

    altimeter = either prefer_hardware or software

should do the trick I think

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[John Jensen]

I will change it to that when I get home from work and see if that works. Thanks Andrew.

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[Andrew Milner]

Most things are in the weewx guides - and the latest guides are a mine of information.  Make sure you know what is in them - things can change with new versions!!!!  Always refer to the guides rather than making guesses and assumptions - that is what they are there for - and weewx guides are amongst the best I have ever seen for any program anywhere!!!

[John Jensen]

I had read them. I think I misinterpreted it LOL

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