Recent Posts

Pages: [1] 2 3 ... 10
1
I have a Vantage Pro2 with 24 hr Aspiration Fan and was wondering if with a steady air movement across the SHT 31 sensor will keep it a little lower than the shield without a fan. Has anyone compared that?

Theoretically, fan aspiration shouldn't lower or raise accurately measured humidity. Some of the best psychrometers are fan aspirated. That said, when compared to a passively ventilated shield, on some clear, still mornings the FARS will report slightly higher temperatures which lead to lower reported humidities. Those temps are actually more accurate and, therefore, the humidity should be as well. However, if you observe widespread dew, it's because the air and surrounding objects are not shielded from longwave radiation which has a cooling effect driving the temp down to the dew point. This is somewhat akin to the difference of how the temperature feels when you are standing in the sun vs the same temperature in the shade.

There's a more general problem with measuring humidity inside radiation shields (something kcidwx, the NWS tech, covered much earlier in this thread). If the air has been saturated for awhile, the inside of the shield can collect moisture. You can argue that a fan will make a shield wetter when the air is loaded, particularly in low wind conditions. But the opposite is also true: a fan accelerates evaporation and should return the shield to balance with the outside air once humidity begins to drop.
2
Well i used the formula and my result was humidity 96.8 and i am showing 97% pretty darn close, must be the sht75 doing it's thing.
3
Weather Web Resources / Re: Who all uses your data?
« Last post by PaulMy on Today at 09:23:16 AM »
Hi Greg, maybe this

https://weather.gladstonefamily.net/qchart/D3930?date=20180727&addnl=F2530&Add+to+charts=Add+to+charts&.cgifields=addnl

Just change my D3930 and F2530 in he url with your and any other CWOP station ID you want to compare.

Enjoy,
Paul

4
AcuRite Weather Stations / Re: Did Amazon Pull the Atlas?
« Last post by galfert on Today at 09:17:05 AM »
Quote
In the case of all three companies they offer the ability to customize and expand without having to pay extra for functionality (Internet connectivity) that is only needed at one point.

The biggest difference is the Ambient Solution is 100% wireless. (except for the power cord to the console). 

The Ambient Weather ObserverIP also requires Ethernet cabled connection. But as you pointed out the display consoles with WiFi are nice. With Davis there is now a WiFi logger available. So Ambient isn't the only one with a WiFi solution.

Also it is possible to turn an Ethernet device into a WiFi device by using an access point that can be configured to become an Ethernet to WiFi bridge. I've done that with my ObserverIP. So someone could do that with their Acurite Access.
5
Meteohub/Meteobridge / Re: New .. Meteobridge Nano for Davis VP2/Vue
« Last post by weather34 on Today at 09:14:46 AM »
just a quick rough guide to this amazing little component ..nothing technical just highlighting its simplicity on how to install and use ..

https://weather34.com/homeweatherstation/guides/nano34.html

Was the cover left off just for the photo? It does fit after fitting the nano doesn't it?

Greg H.

yes :-)
6
Meteohub/Meteobridge / Re: New .. Meteobridge Nano for Davis VP2/Vue
« Last post by weather34 on Today at 09:14:22 AM »
Thanks for the informative post. If I currently have a Meteorbridge hub, can I make a backup of my settings and then use the "restore" button on the Nano interface up transfer my settings?

thats an answer for boris , in my case i used a new VP2 and nano same time, my previous hardware was a WMR300 with meteobridge hub so i never contemplated that one..
7
Meteohub/Meteobridge / Re: New .. Meteobridge Nano for Davis VP2/Vue
« Last post by docbee on Today at 09:14:14 AM »
Yes, it fits. The cover can be closed again.
8
Meteohub/Meteobridge / Re: New .. Meteobridge Nano for Davis VP2/Vue
« Last post by miraculon on Today at 09:12:49 AM »
just a quick rough guide to this amazing little component ..nothing technical just highlighting its simplicity on how to install and use ..

https://weather34.com/homeweatherstation/guides/nano34.html

Was the cover left off just for the photo? It does fit after fitting the nano doesn't it?

Greg H.
9
Meteohub/Meteobridge / Re: New .. Meteobridge Nano for Davis VP2/Vue
« Last post by docbee on Today at 09:12:32 AM »
Yes. But historical min/max values will not be transferred.
10
Meteohub/Meteobridge / Re: New .. Meteobridge Nano for Davis VP2/Vue
« Last post by mthiessen on Today at 09:09:54 AM »
Thanks for the informative post. If I currently have a Meteorbridge hub, can I make a backup of my settings and then use the "restore" button on the Nano interface up transfer my settings?
Pages: [1] 2 3 ... 10
anything