[wxqc] Barometric pressure errors

[Eleanor Linkkila]

For anyone who doesn't have the manual for the Vantage Pro2 (or most likely for any Davis Station) the manuals are online at www.davisnet.com.   The manual that came with my station had information missing on a few pages and Davis suggested that I use the online manual.  I have no problem with my barometer and all that was necessary was to set the elevation according to the manual.
   
  Eleanor, CW7448
   
  Don Jeerings <Djeerings at tampabay.rr.com> wrote:
            Searching the “Net” to try to figure out why my brand new Vantage Pro 2 barometer tracks 3 or 4 mb’s plus or minis over a period of a few days. I ran across your inquire as to the same problem.  Notice your quality checks are 2 thumbs up now. May I ask what did you finely do to correct this, set to zero elevation? I am at 5454ft.
  My old weather monitor II was just set to zero and I added 5.35 inches through software for years with great results.
   
  I found lots of references but no solutions.
  I would greatly like to know what you ended up doing.
   
  Chris 
  AR893 (station off line because of the errors)
  Radar21 at comcast.net
   
  Chris 
   
  There may be two different problems, Keep in mind that corrections can be made in the Vantage Pro 2 (ISS) console  or sometimes in the associated software. (like WD Display software by Brian Hamilton). 
   
  It is best to program the Vantage Pro 2 equipment first.
   
  You will need to first program in your altitude and since you are over 5,000 ft, this will make a significant correction. 
   
  Once you have the altitude programmed in you can make small corrections by using the BAR section.
   
  If you have the Davis Console Manual I will refer to the page numbers. 
   
  If you do not have the manual, E-mail me back and I will try and copy out the pertinent information for you. 
   
   After you go into setup, look on Page 15  for the elevation correction procedures,
   
   And look at the top of page 26 for making the barometer correction procedures.. 
   
  Note that if you use the Mill bar units for you’re BAR settings, you will obtain better resolution  and better accuracy. (also use Fahrenheit on your temperature for better resolution)
   
  After you make a calibration change you should wait at least 24 hours to evaluate it. Make small changes and allow a day or so between calibration corrections. KEEP A LOG of your corrections so you know where you are.
   
  Let me know if this helps,. I can copy down in detail and send you more information. 
   
  Don Jeerings
   
  Djeerings at tampabay.rr.com
   
  Note also that the set up is for programming of many other important variables for your system. 

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