Author Topic: Looking for suggestions on fan aspiration/humidity issues....  (Read 13634 times)

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Offline sam2004gp

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Re: Looking for suggestions on fan aspiration/humidity issues....
« Reply #25 on: September 07, 2008, 09:08:03 AM »
Killwilly, no offense taken.  I knew you were intrigued by the difference in house styles, and culltures.   :-)

Anthony, those pics were requested by Wayne, but I would love to see them too.  :-)
SAM --->>> http://www.mountcrawfordweather.org
OS WMR-968 with a Dedicated PWS Weather Computer running VWS v13.01 p09


Offline W Thomas

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Re: Looking for suggestions on fan aspiration/humidity issues....
« Reply #26 on: September 08, 2008, 01:08:19 AM »
Sam, No problem getting you a few pics. Just give me a couple of days. If I'm not mistaken. The guy who built it also sent me the instructions, I think. Just hope I can find them on the computer.




Thanks Anthony,
That was probably me as well barging in and asking for the photo's !
I am curious as to it's design. It sounds a little different from all the others I have considered.
The instructions would be even better :grin:

Thanks!

Wayne
www.smythweather.net
cw8217


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     Wayne
CW8217
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VWS 14.00 P45   OS WMR 968 &  Davis Vantage Pro 2  / Dedicated Server
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Offline Anthony

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Re: Looking for suggestions on fan aspiration/humidity issues....
« Reply #27 on: September 08, 2008, 08:24:49 AM »
oops, got to start weating my glasses when I'm on the computer. :roll: Might be able to see what I'm reading. #-o



Thanks,
Anthony
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Offline W Thomas

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Re: Looking for suggestions on fan aspiration/humidity issues....
« Reply #28 on: September 08, 2008, 02:25:27 PM »
I should do the same  :lol:
Just don't ever do what I did a few years back and accidentally stick a pocket screwdriver in you eye.
That was quite an experience to say the least! I haven't had surgery yet but my doctor says it's probably
inevitable that somewhere down the line I will.

My wife says I hit 40 and fell apart at the seams :lol:

Wayne
www.smythweather.net
cw8217


     Best Regards
     Wayne
CW8217
CoCoRaHS VA-SM-1
KVAMARIO3 Wunderground 
VWS 14.00 P45   OS WMR 968 &  Davis Vantage Pro 2  / Dedicated Server
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Offline sam2004gp

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Re: Looking for suggestions on fan aspiration/humidity issues....
« Reply #29 on: September 17, 2008, 05:06:38 PM »
SAM --->>> http://www.mountcrawfordweather.org
OS WMR-968 with a Dedicated PWS Weather Computer running VWS v13.01 p09


Offline sam2004gp

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Re: Looking for suggestions on fan aspiration/humidity issues....
« Reply #30 on: September 17, 2008, 05:30:08 PM »
Wow, my numbers are close again, without "calibration" adjustments needed.... (at least at the time of this posting)

  <<<<WMR-968 Channel (Null)          <<<<<<These two are the ones mounted on the fence post/shield
  <<<<

My temp readings for what it's worth...
  <<<<WMR-968 Channel (Null)          <<<<<<These two are the ones mounted on the fence post/shield
  <<<<


NEW EDIT: 5:30PM
Now my numbers are fluctuating largely, the OS sensor was on average 11 below the Radio Shack Sensor (ch1) before the "Spider eviction"  now it jumps to 20+ over it for at least the half hour.  I guess the "pie plates" are still damp.  I will give it a few hours to settle down.



NEWEST EDIT 7:50PM 
Things have settled down somewhat
The numbers are on a trend up because of night falling but you can see how the OS (red line) fluctuates more than the Radio Shack (yellow line).
« Last Edit: September 17, 2008, 07:50:24 PM by sam2004gp »
SAM --->>> http://www.mountcrawfordweather.org
OS WMR-968 with a Dedicated PWS Weather Computer running VWS v13.01 p09


jwyman

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Re: Looking for suggestions on fan aspiration/humidity issues....
« Reply #31 on: September 17, 2008, 06:21:58 PM »

Oh yeah, i remember 40.... Or was that 30?


I should do the same  :lol:
Just don't ever do what I did a few years back and accidentally stick a pocket screwdriver in you eye.
That was quite an experience to say the least! I haven't had surgery yet but my doctor says it's probably
inevitable that somewhere down the line I will.

My wife says I hit 40 and fell apart at the seams :lol:

Wayne
www.smythweather.net
cw8217

Offline sam2004gp

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Re: Looking for suggestions on fan aspiration/humidity issues....
« Reply #32 on: September 17, 2008, 07:50:48 PM »
EDIT posted above..
SAM --->>> http://www.mountcrawfordweather.org
OS WMR-968 with a Dedicated PWS Weather Computer running VWS v13.01 p09


Offline sam2004gp

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Re: Looking for suggestions on fan aspiration/humidity issues....
« Reply #33 on: September 19, 2008, 01:52:45 PM »
Okay, my numbers seem to be normal again.  Now I can get back to interacting with the real world again.
SAM --->>> http://www.mountcrawfordweather.org
OS WMR-968 with a Dedicated PWS Weather Computer running VWS v13.01 p09


Offline W Thomas

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Re: Looking for suggestions on fan aspiration/humidity issues....
« Reply #34 on: September 19, 2008, 07:19:16 PM »
Thats good News!!
My dew point readings/calculations are off again :-x

Oh well...like always work in progress!

Wayne
www.smythweather.net
cw8217


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     Wayne
CW8217
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Offline sam2004gp

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Re: Looking for suggestions on fan aspiration/humidity issues....
« Reply #35 on: September 22, 2008, 10:44:42 AM »
Thats good News!!
My dew point readings/calculations are off again :-x

Oh well...like always work in progress!

Wayne
www.smythweather.net
cw8217

Yeah, I wish I could afford one if the Davis stations or something.  Now my temp seems to be on the average about 2 degress higher than anybody in a 50 mile radius. 

I tried to get my station in a "nuetral" temp location, but you can only do what you can do. 

I also fished a 3.5 inch fan out of my junk pile, and it looks like i could do fan aspiration if I dremel two holes thru my bottom pie plates.

Not sure if I want to do it yet.
SAM --->>> http://www.mountcrawfordweather.org
OS WMR-968 with a Dedicated PWS Weather Computer running VWS v13.01 p09


Offline sam2004gp

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Re: Looking for suggestions on fan aspiration/humidity issues....
« Reply #36 on: September 22, 2008, 10:50:27 AM »
Below is a pic and text that I got from Steve Bogan, a member on here.   So I am thinking of adding something like this, but not sure if I want to hack the pie plates and I need to find a power source access.

Does anyone know if should pull air from the sensor or push air onto the sensor?

Quote
hi sam i  seen your post....i did a fan on mine i'll send you a pic of it.... i'm running it off a 12 volt land scape light timmer i used a 120 mm computer fan with a small mod. i cut 2 corners off it ...i took 1 of the bottom plates off and  took a dremel cut a hole in it.... the other one i left off and saved it for later use if needed  i also  removed 1 of the threaded rods

« Last Edit: September 22, 2008, 10:52:28 AM by sam2004gp »
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Offline NiceBill

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Re: Looking for suggestions on fan aspiration/humidity issues....
« Reply #37 on: September 22, 2008, 11:04:46 AM »
Sam,

This is how I see it, however you do what you wish.

The fan, should be somewhat smaller than the one shown in the photo.  Constant movement of the air is all that is required, not a strong wind storm. (the fan may have a rheostat in line?)
The fan should be placed above the sensors and draw or pull the air past the sensors and expel it out the top of the shielding.
To push the air past the sensors would only invite large amounts of bug matter-splatter to be deposited on to the sensors and eventually over time give false readings, as well as create an unsightly mess.

Bill.>>>>>>>>>>>> :-)
 
« Last Edit: September 22, 2008, 11:09:39 AM by NiceBill »
[note: Bill passed away December 31, 2008 -- Rest in Peace Bill, you'll be missed!]

Offline sam2004gp

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Re: Looking for suggestions on fan aspiration/humidity issues....
« Reply #38 on: September 22, 2008, 11:39:59 AM »
Sam,

This is how I see it, however you do what you wish.

The fan, should be somewhat smaller than the one shown in the photo.  Constant movement of the air is all that is required, not a strong wind storm. (the fan may have a rheostat in line?)
The fan should be placed above the sensors and draw or pull the air past the sensors and expel it out the top of the shielding.
To push the air past the sensors would only invite large amounts of bug matter-splatter to be deposited on to the sensors and eventually over time give false readings, as well as create an unsightly mess.

Bill.>>>>>>>>>>>> :-)
 
Thanks, for the insights bill. I do have a smaller, perhaps slightly less powerfull fan than the one shown here. I will have to see if I can figure it out a design/hack that will allow me to bring the fan to the top of the pie plate stack.
SAM --->>> http://www.mountcrawfordweather.org
OS WMR-968 with a Dedicated PWS Weather Computer running VWS v13.01 p09


Offline Anthony

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Re: Looking for suggestions on fan aspiration/humidity issues....
« Reply #39 on: September 23, 2008, 08:30:34 AM »
You want to pull the air across the sensor. If you push it. Any hot air trapped in the top of the enclosure may get recirculated around the sensor giving you a false temp reading.



Thanks,
Anthony
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jwyman

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Re: Looking for suggestions on fan aspiration/humidity issues....
« Reply #40 on: September 23, 2008, 09:17:28 AM »
Sam,
  Check out this link for a photo of my setup/fan unit....

http://www.wxforum.net/index.php?topic=1652.0

Jim

Offline W Thomas

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Re: Looking for suggestions on fan aspiration/humidity issues....
« Reply #41 on: September 23, 2008, 11:00:42 PM »
Thats good News!!
My dew point readings/calculations are off again :-x

Oh well...like always work in progress!

Wayne
www.smythweather.net
cw8217

Yeah, I wish I could afford one if the Davis stations or something.  Now my temp seems to be on the average about 2 degress higher than anybody in a 50 mile radius. 

I tried to get my station in a "nuetral" temp location, but you can only do what you can do. 

I also fished a 3.5 inch fan out of my junk pile, and it looks like i could do fan aspiration if I dremel two holes thru my bottom pie plates.

Not sure if I want to do it yet.


I know exactly what you mean Sam! I have almost had a replacement a time or two and then something would come along and cause me to
use the funds for something else... Still trying here!

Wayne
www.smythweather.net
CW8217


     Best Regards
     Wayne
CW8217
CoCoRaHS VA-SM-1
KVAMARIO3 Wunderground 
VWS 14.00 P45   OS WMR 968 &  Davis Vantage Pro 2  / Dedicated Server
GR Level 3 ,Level 2 AE Radars  Weather Display 10.37P  Mid Atlantic Weather Network Member
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Offline W Thomas

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Re: Looking for suggestions on fan aspiration/humidity issues....
« Reply #42 on: September 23, 2008, 11:08:51 PM »
Sam,
  Check out this link for a photo of my setup/fan unit....

http://www.wxforum.net/index.php?topic=1652.0

Jim

Jim,
Is this your design or a prefab shield?
I was curious as to what type of plate was used..plastic or clay.

Wayne
www.smythweather.net
CW8217


     Best Regards
     Wayne
CW8217
CoCoRaHS VA-SM-1
KVAMARIO3 Wunderground 
VWS 14.00 P45   OS WMR 968 &  Davis Vantage Pro 2  / Dedicated Server
GR Level 3 ,Level 2 AE Radars  Weather Display 10.37P  Mid Atlantic Weather Network Member
SkyWarn & Spotter Network 6092