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Author Topic: Humidity fluctuations (SOLVED)  (Read 204 times)

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Offline mikeym

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Humidity fluctuations (SOLVED)
« on: April 20, 2019, 02:40:28 PM »
Any idea why I'm seeing this fluctuations in my humidity reading. This started a few months ago. The temp/humidity sensor and ISS have been replaced with no change. It fluctuates from the correct reading to 45%. The console always shows the correct humidity. The incorrect humidity readings are causing the dewpoint reading to fluctuate. This logfile will show the fluctuations:

http://mikeymsweather.com/42019lgcsv.csv

Version 1037s build 94  04/18/2019 and previous builds

I'm really at a loss on fixing this. Any ideas would be GREATLY appreciated - Thanks

MikeyM

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« Last Edit: April 21, 2019, 11:21:07 PM by mikeym »
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Offline niko

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Re: Humidity fluctuations
« Reply #1 on: April 20, 2019, 03:16:32 PM »
Looking at the start of that logfile shows humidty flat at 45% with deviations to around 60% at fairly regular intervals, approximately each10 minutes.

Probably a dumb question, and it would be a bit tedious, but have you tracked the humidty on the console and in WD for a long enough period to be sure WD is deviating from the console value?

Do you have any alternate/additional data source set up in WD that might be causing this, e.g. metar or ??


Offline mikeym

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Re: Humidity fluctuations
« Reply #2 on: April 20, 2019, 03:33:18 PM »
Thanks for looking Niko. The console will always show the correct humidity readings with no fluctuations other than when the humidity actually changes. The current reading is 96% in rain showing on the console and yet the logfile will show readings between the correct reading down to 45%, but never below 45%. I never had this problem until a few months ago and after changing the temp/humidity sensor with no improvement I decided to change the ISS which I did several days ago. I had been comparing the VP2 humidity with the WeatherFlow and they were always within 2% of each other, but of course because I want to compare them the WeatherFlow humidity sensor is acting up this morning  and I haven't had time to get out and try a rest of it. You know Murphy's Law!

Acutaly as we speak the VP2 console just went from 96% to 95% as the rain is stopping.

Closest ASOS is KMPO and it's showing 100% humidity 30 minutes ago.


MikeyM   :?
http://mikeymsweather.com/

Another VERY Happy WD user
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Offline niko

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Re: Humidity fluctuations
« Reply #3 on: April 20, 2019, 03:50:44 PM »
Hmmm, gotta be a clue in the regularity of the error  :?

Offline mikeym

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Re: Humidity fluctuations
« Reply #4 on: April 20, 2019, 04:00:33 PM »
Wonder if it could possible the data logger?
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Offline niko

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Re: Humidity fluctuations
« Reply #5 on: April 20, 2019, 04:47:20 PM »
Seems unlikely that the logger would choose to only mess up humidity, I don't believe we have ever seen that before with the Davis.

Hopefully Brian has some ideas?

If you want to investigate some more it's pretty easy to do a basic setup for the VP in WD. I would temporarily install a second instance of WD using the 2wd.txt method so it doesn't affect your main WD. Let it run for a while with just a minimal VP setup and see if you get the same result. That will tell you for certain if the Davis has a problem.

So long as you run that for less than 40 hours you will be able to restart the original WD and catch up the missed data.


Offline mikeym

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Re: Humidity fluctuations
« Reply #6 on: April 20, 2019, 05:06:15 PM »
Just went back over the "lgcsv.csv" files and this started to happen 10/11/2018 20:12 really strange.
Thanks I'll give that a try.
Spent enough time on it today and I better get some other projects done.

Cheers

Thanks

MikeyM
http://mikeymsweather.com/

Another VERY Happy WD user
Shuttle XS36v4 8 GB RAM
Davis Vantage Pro 2 wireless w/ Davis solar sensor
Laser Snow Depth Sensor LR4/Fluke 414D working in WD thanks to Brian

Offline Weather Display

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Re: Humidity fluctuations
« Reply #7 on: April 20, 2019, 06:58:47 PM »
maybe you have set to use a metar for humidity or similar

Offline mikeym

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Re: Humidity fluctuations
« Reply #8 on: April 20, 2019, 08:31:32 PM »
Brian
Checked the Metar setup and I have "Metar OFF"  and nothing is checked.

Thanks for looking.

MikeyM
http://mikeymsweather.com/

Another VERY Happy WD user
Shuttle XS36v4 8 GB RAM
Davis Vantage Pro 2 wireless w/ Davis solar sensor
Laser Snow Depth Sensor LR4/Fluke 414D working in WD thanks to Brian

Offline Weather Display

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Re: Humidity fluctuations
« Reply #9 on: April 20, 2019, 11:19:50 PM »
if you could email me your settings files then I will test here with VP

Offline Weather Display

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Re: Humidity fluctuations
« Reply #10 on: April 21, 2019, 09:21:16 PM »
I found the problem, is to do with your HB 1 wire settings
I sent you an email on how to reset those

Offline mikeym

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Re: Humidity fluctuations (SOLVED)
« Reply #11 on: April 21, 2019, 11:25:04 PM »
Brian

Thank you VERY much! The problem is solved!   :salute:   =D>

Cheers

 :D

MikeyM
http://mikeymsweather.com/

Another VERY Happy WD user
Shuttle XS36v4 8 GB RAM
Davis Vantage Pro 2 wireless w/ Davis solar sensor
Laser Snow Depth Sensor LR4/Fluke 414D working in WD thanks to Brian