Clarification on Meteobridge Pro and Davis Console sensors

[woolfg]

Hi

I need some help here I am having real problems sorting out my sensors
My Meteobridge Pro is connected to my Davis Console and ISS using the internal RF - the only other connection int the Meteobridge is to my LAN

Firstly I have been doing some Cumulus data importing and I understand the pressure goes to thb0press

The Problem that I have is this

These are my tbhb0press readings

pressure.jpg (37.7 KiB) Viewed 4048 times

And these are my thb09press readings

pressure2.jpg (28.02 KiB) Viewed 4048 times

The problem is none of these readings are the same as the Davis Console pressure readout on the screen which is different by a few millibars

Are any of the sensors shown above coming from the Davis or is the console readout ignored

I would love to know the answer

Thanks

Graham

[Mattk]

Using RF then your MB is either connected to your ISS (directly) or connected through your Console via the console re-transmit, it can not be connected to both (as such). Either way the MB is not reading pressure from the Console using RF

[woolfg]

Hi

Thanks for the reply

I assume then that even if I use RF via console then it won't read the Davis console pressure.

My second question is then assuming the thb0press and thb9press are onboard the Meteobridge why is there a difference of nearly 5mb in the pressure reading between the two sensors and why are the readings so different from the Davis console reading when they are both in the same vicinity.

Graham

[Mattk]

I assume then that even if I use RF via console then it won't read the Davis console pressure.

Yes via RF the MB really doesn't know the console exists, threats it as an ISS

Pressure difference? User config can affect this, have you checked the Barometer settings, Station Elevation, Sea Level etc for the Console as well as the local MB settings/Correction (bottom of station Tab)?

[woolfg]

Hi Mattk

I have set everything to zero as shown here and still have a 6mb difference between the two sensors

1.jpg (36.33 KiB) Viewed 4023 times

2.jpg (32.54 KiB) Viewed 4023 times

3.jpg (27.86 KiB) Viewed 4023 times

The only thing I haven't done is reset the elevation setting on my davis console - would that have an impact

Regards

Graham

[Ag2000CO]

The only thing I haven't done is reset the elevation setting on my davis console - would that have an impact

Yes. For any given location, the pressure decreases as the elevation (altitude) increases. For example, that is why airplanes are pressurized.
To get the correct pressure reading, you need to adjust the elevation on both your Davis console and your MS Pro.

You should use the elevation of the console/MB PRO.

[woolfg]

The only thing I haven't done is reset the elevation setting on my davis console - would that have an impact

Yes. For any given location, the pressure decreases as the elevation (altitude) increases. For example, that is why airplanes are pressurized.
To get the correct pressure reading, you need to adjust the elevation on both your Davis console and your MS Pro.

You should use the elevation of the console/MB PRO.

Hi

With respect I think you are missing the point of the thread . My problem is why two sensors on the same device show a difference of 6mb which is way more than any elevations settings would account for. The difference between the tbh0press and tbh0seapress is correct for my elevation - its the 6mb difference between tbh0press and tbh9press that is the problem

Regards

Graham

[admin]

Calibrate the th0press on "Station" tab to your liking and you are fine. Sensors do differ, no way around this and this is the reason for being able to calibrate. I have no influence on BMP180 data accuracy and don't do individual adjustments as the user can do easily to exactly fit their reference pressure source.