I have a Fine Offset with Solar W-8681 station and run V1.9.4 Cumulus on an old XP laptop.
The pressure reading has been absent for some time - static at 1013.2 on the display console and everywhere else.
So that I can home in on this issue can anyone tell me which hardware module in the weather station has the sensor?
I assume it's in the display console.
Strange thing is I have a second console which produces 1013.2 pressure reading too. With nothing connected to it.
In desperation I've even read the Fine Offset instruction manual, but I can't shift the static 1013.2 value.
Geo
www.mecol.co.uk/weather/index.htm
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Latest Cumulus MX V3 release 3.28.6 (build 3283) - 21 March 2024
Cumulus MX V4 beta test release 4.0.0 (build 4019) - 03 April 2024
Legacy Cumulus 1 release 1.9.4 (build 1099) - 28 November 2014
(a patch is available for 1.9.4 build 1099 that extends the date range of drop-down menus to 2030)
Download the Software (Cumulus MX / Cumulus 1 and other related items) from the Wiki
Fine Offset Pressure sensor
- mcrossley
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Re: Fine Offset Pressure sensor
The pressure sensor is in the console.
Is it a coincidence that 1013.2 is standard atmospheric pressure?
Is it a coincidence that 1013.2 is standard atmospheric pressure?
-
- Posts: 17
- Joined: Wed 06 Jul 2011 6:41 am
- Weather Station: W-8681 Solar
- Operating System: XP
- Location: Kidderminster
- Contact:
Re: Fine Offset Pressure sensor
The 1013.2 reading is rel. hpa - the abs pressure reading is zero.
I'm a bit confused as to what rel/abs mean to be honest.
But you've hit on the issue I think.
I'm a bit confused as to what rel/abs mean to be honest.
But you've hit on the issue I think.
-
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Re: Fine Offset Pressure sensor
The absolute pressure is what your sensor measures, stores in the circular memory, and then outputs to Cumulus.
The relative pressure adds a constant, (you have set in either the Fine Offset console or in Cumulus.ini), to convert that measurement to its equivalent value, if pressure was measured at sea level. This, adjusting for altitude, allows you to compare your measurements relative to those at other locations.
This forum topic includes photographs of various Fine Offset models, trying to identify which component is what sensor.
-
- Posts: 17
- Joined: Wed 06 Jul 2011 6:41 am
- Weather Station: W-8681 Solar
- Operating System: XP
- Location: Kidderminster
- Contact:
Re: Fine Offset Pressure sensor
Thanks for clarification of abs/rel
So I seem to have two consoles each with the same pressure sensor fault. Extraordinary.
I have two btw because I bought a second station some 10 years back for spares. That proved to be a good move as I've had to use several of the spares. The only duff spare seems to be the consol but I used that consol years ago over a long period and it all worked. I wonder if there is some age related failure in the pressure sensor?
On the spare consol, I cleared out the memory and restored factory defaults but it still shows zero abs pressure.
So I'm now thinking of adding some javascript to indexT.html to pull in a pressure reading off the internet and somehow merge it.
Or I could buy a third weatherstation!
So I seem to have two consoles each with the same pressure sensor fault. Extraordinary.
I have two btw because I bought a second station some 10 years back for spares. That proved to be a good move as I've had to use several of the spares. The only duff spare seems to be the consol but I used that consol years ago over a long period and it all worked. I wonder if there is some age related failure in the pressure sensor?
On the spare consol, I cleared out the memory and restored factory defaults but it still shows zero abs pressure.
So I'm now thinking of adding some javascript to indexT.html to pull in a pressure reading off the internet and somehow merge it.
Or I could buy a third weatherstation!