[wxqc] CW0467 dew point

[bfgiii at adelphia.net]

Greetings!
I hope I'm doing this right!
I have been contributing to CWOP through APRS for a couple of years now but have just started with wxqc last winter.  I just joined the list last week.  My data quality has improved immensely for it.
I received this email and it's associated responses: 

Dave,
I have the Ultimeter 2100 also but, using the unshielded version of the
temp/humidity sensor and have always been getting dinged on dew point..  I
thought I'd try your suggestion today and opened up the sensor and found the
board is just a tiny bit different but, the set screw was there.  I gave it one
full turn clockwise and it looks like it lowered the humidity by about 6%.  The
afternoon seabreeze kicks in around this time of day here and the humidity
starts going up like a rocket so it is a little hard to tell exactly.  Using the

stats below from Wunderground, I shut down Weather Display at 13:55 and started
it back up at 14:30 and you can see there is quite a difference in humidity
however, the dew point only dropped by 1%.  I'll monitor it now for a while and
see what the QC reports look like.  Thanks for the tip.

Regards, Harold
CW3109
Wunderground: KCAUNION2

I own the same Peet Bros. equipment and run Weather-Display too.  I recently changed to the shielded sensor in hopes of improving readings.
I agree that this equipment reads a little high in both temp and DP.  The new sensor has improved the readings and smoothed them out quite a bit, but I still show nearly 2 degrees warm on most of my wxqc graphs.  I have the WD offsets at -2.5 degrees for temp and a slope adjust at -6% for humidity now.
I compare my reading to the METAR KPYM regularly and my they are usually very close.  I am located much closer to the ocean than they are. It would be great to have you look at my stations data and position and make any suggestions that could help improve my contributions.

Many Thanks!
Ben Goodrich
CW0467