[wxqc] Sling Psychrometer

[Thomas Giella KN4LF]

Jim,

You use it in direct sunlight as the rotation of the thermometers will counteract any direct insolation error. Shade readings will be just as inaccurate as placing an instrument shelter under a tree or on the north side of a building or structure. Shade readings will be lower temperature wise and higher dewpoint and relative humidity wise.

If your Stevenson Screen instrument shelter is properly constructed and exposed, then direct sun readings from a sling psychrometer will be the same. 

Take Care,
Thomas F. Giella, KN4LF
Retired Meteorologist & Space Plasma Physicist
Lakeland, FL, USA
flycylone at tampabay.rr.com

NWS Tampa Bay, FL SKYWARN Observer #POL-10A

Lakeland, FL NWS CWOP Weather Station #AR692/KN4LF 3 Second Data: http://www.kn4lf.com/index1.html
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Lakeland, FL Daily Climatological Weather Data Archive Blog: http://www.kn4lf.com/kn4lf22.htm
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  Anyone

  I just received my Sling Psychrometer from Ben Meadows. It seams relatively
  easy to use.
  My question is. Is there a proper technique to get the most accurate
  readings? should the readings be taken in the sun or shade (I'm thinking
  shade)?
  is there a website I can download a Humidity Chart should I need to replace
  the one that came with the Psychrometer?

  Jim Crumly
  CW4367
  Version: 7.1.392 / Virus Database: 268.5.5/335 - Release Date: 5/9/2006

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