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Recent Posts
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Ambient Weather and Ecowitt and other Fine Offset clones / Re: WH51 for measuring moist level at 60cm or 80 cm depth
« Last post by roferfruitfarm on April 15, 2024, 04:09:42 AM »Does anybody have a more sophisticated implementation on how to adjust the sensor to gather more information at lower depths? Thanks!
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Davis Instruments Weather Stations / Re: Setting Correct Barometer reading with VP2 and Weather Envoy
« Last post by CW2274 on April 15, 2024, 03:09:36 AM »Who has not read this?Me, for one. Never saw this before. That definitively answers my simple question. Obviously, the Davis employee I spoke to in the other thread had no idea what he/she was talking about. Shocking.
Thanks for the info.
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Davis Instruments Weather Stations / Re: Setting Correct Barometer reading with VP2 and Weather Envoy
« Last post by Mattk on April 15, 2024, 02:55:58 AM »95
Davis Instruments Weather Stations / Re: Setting Correct Barometer reading with VP2 and Weather Envoy
« Last post by CW2274 on April 15, 2024, 01:16:02 AM »The WL Console User guide (7395.402_F_WeatherLink_Console_User_Guide) does actually outline an accurate Elevation is important for accurate barometric pressure settings (page 17). Barometric Pressure on page 22 also outlines the relationship with "altitude to determine the offset value to consistently translate atmospheric pressure into barometric pressure". Not sure why there continues to be a misunderstanding with this?This has nothing to do with the price of tea in China. Tells us nothing of what pressure reduction algorithm is being used. Big difference between SLP and altimeter, especially when you get into higher elevations and the differences become much more apparent. Makes just a tiny difference on ones setup. Not really sure what the problem is with understanding this.
The other document that some should read the Barometric Pressure section of is AN_28-derived-weather-variables (Application Note 28) which outlines the Derived Variables in Davis Weather Products. Even in 2006 the two methods were clearly being clarified so not really sure what the problem is?
BTW, I knew my concern was justified. See post #35. I had completely forgotten I spoke to Davis on this subject.
https://www.wxforum.net/index.php?topic=45032.25
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Davis Instruments Weather Stations / Re: Setting Correct Barometer reading with VP2 and Weather Envoy
« Last post by Mattk on April 15, 2024, 01:02:28 AM »The WL Console User guide (7395.402_F_WeatherLink_Console_User_Guide) does actually outline an accurate Elevation is important for accurate barometric pressure settings (page 17). Barometric Pressure on page 22 also outlines the relationship with "altitude to determine the offset value to consistently translate atmospheric pressure into barometric pressure". Not sure why there continues to be a misunderstanding with this?
The other document that some should read the Barometric Pressure section of is AN_28-derived-weather-variables (Application Note 28) which outlines the Derived Variables in Davis Weather Products. Even in 2006 the two methods were clearly being clarified so not really sure what the problem is?
The other document that some should read the Barometric Pressure section of is AN_28-derived-weather-variables (Application Note 28) which outlines the Derived Variables in Davis Weather Products. Even in 2006 the two methods were clearly being clarified so not really sure what the problem is?
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Davis Instruments Weather Stations / Re: Setting Correct Barometer reading with VP2 and Weather Envoy
« Last post by CW2274 on April 15, 2024, 12:48:12 AM »Yes, I saw that, thank you. johnd is probably the most informed Davis user in this forum. Although I don't doubt his word, he's not Davis. All I was looking for was "official" documentation (in other words, the owner's manual) on what pressure reduction was being used. Evidently, Davis chose to leave that tidbit out.
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Davis Instruments Weather Stations / Re: Setting Correct Barometer reading with VP2 and Weather Envoy
« Last post by Swede on April 15, 2024, 12:29:34 AM »I posted a link to this article below. Most of the way thru it the differences for the equipment is noted. This is where I got my info:
https://www.manula.com/manuals/pws/davis-kb/1/en/topic/barometric-pressure-issues
https://www.manula.com/manuals/pws/davis-kb/1/en/topic/barometric-pressure-issues
The Console calculates the pressure via the Altimeter method.I'm not disputing you, but how do you know? By your comparison or lit...both...So, which is it? Does the 6313 calculate altimeter or not? The owner's manual is annoyingly non-specific (at least what I saw..). I've been spewing from day one that I found the lack of altimeter head scratching on the 6313, including this thread, and not one soul has corrected me. So, which is it? SLP or altimeter?
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Davis Instruments Weather Stations / Re: Setting Correct Barometer reading with VP2 and Weather Envoy
« Last post by CW2274 on April 14, 2024, 11:40:15 PM »I'll just stick to my Vue console where you're given a pressure choice of absolute, SLP, or altimeter. Once again, dumbing it down for the masses.
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Davis Instruments Weather Stations / Re: Setting Correct Barometer reading with VP2 and Weather Envoy
« Last post by Mattk on April 14, 2024, 11:00:18 PM »The facts are and as Johnd as outlined, Davis uses different methods to set/determine Barometric pressure depending on the hardware, one method provides a better value then the other which is used in Vantage Pro etc, the other (altimeter) method was to satisfy CWOP and as Barometer pressure is a "derived" variable then one should not be expecting both methods to derive the same value. From WeatherLink 5.7 the altimeter method was supported