Author Topic: dramatically improve the davis 7714 solar shield  (Read 5016 times)

0 Members and 1 Guest are viewing this topic.

Offline G.Brown

  • Senior Member
  • **
  • Posts: 80
Re: dramatically improve the davis 7714 solar shield
« Reply #50 on: October 14, 2022, 06:11:13 PM »
I'm still unsure if the bottom plate should also be painted black?

Offline ivano

  • Senior Contributor
  • ****
  • Posts: 280
    • http://www.supermeteo.com/stazione/ortelle/
Re: dramatically improve the davis 7714 solar shield
« Reply #51 on: October 15, 2022, 01:36:45 AM »
I'm still unsure if the bottom plate should also be painted black?

hello, have you seen the daily charts that I publish? open the link I posted, you will realize that the last plate must be painted black, https://u.pcloud.link/publink/show?code=kZ1LgbVZBf5t5G5lxqzfAfQl1uPiBX1PGNKk
1)3 gw1000 +1 GW2000
2)hp2551
3)ws80
4)ws68
5)2 wh32 EP
6)5 wh31 EP
7)2 meteoschield pro 3 gen
8)1 Fars meteoshield pro 3 gen
9) davis 7714 Black
10)wh40
11)schermo solare RAD-14 Metspec
12)schermo solare RAD-02 Metspec
13)Meteorain 200 compact (Barani)
14)davis ventilato h24
15) Davis vp2 pro ventilata
16) GW1001 ecowitt
17) Wittboy ecowitt
18)schermo solare  Comet system da Cometeo
template http://ortellemeteo.altervista.org/pwsd/
webcam :https://rtsp.me/embed/tRhazi3z/
http://www.supermeteo.com/stazione/ortelle/

Offline G.Brown

  • Senior Member
  • **
  • Posts: 80
Re: dramatically improve the davis 7714 solar shield
« Reply #52 on: October 15, 2022, 08:15:26 AM »
the results dont compare with and without the bottom plate painted black - to clarify mean the bottom (outside) of the bottom plate - others ie Galfert has said the bottom of the bottom plate should be white. The bracket (on the bottom) of the spiral type enclosure is also white....still not resolved?

Offline ivano

  • Senior Contributor
  • ****
  • Posts: 280
    • http://www.supermeteo.com/stazione/ortelle/
Re: dramatically improve the davis 7714 solar shield
« Reply #53 on: October 15, 2022, 12:37:59 PM »
the results dont compare with and without the bottom plate painted black - to clarify mean the bottom (outside) of the bottom plate - others ie Galfert has said the bottom of the bottom plate should be white. The bracket (on the bottom) of the spiral type enclosure is also white....still not resolved?
guys but why does the bottom of the last plate have to be white? with what criterion is this said? has anyone tried the white dish then the black dish? here I did it, and the result was to make it black there will be a reason, it is not a whim
1)3 gw1000 +1 GW2000
2)hp2551
3)ws80
4)ws68
5)2 wh32 EP
6)5 wh31 EP
7)2 meteoschield pro 3 gen
8)1 Fars meteoshield pro 3 gen
9) davis 7714 Black
10)wh40
11)schermo solare RAD-14 Metspec
12)schermo solare RAD-02 Metspec
13)Meteorain 200 compact (Barani)
14)davis ventilato h24
15) Davis vp2 pro ventilata
16) GW1001 ecowitt
17) Wittboy ecowitt
18)schermo solare  Comet system da Cometeo
template http://ortellemeteo.altervista.org/pwsd/
webcam :https://rtsp.me/embed/tRhazi3z/
http://www.supermeteo.com/stazione/ortelle/

Offline mcrossley

  • Forecaster
  • *****
  • Posts: 1064
    • Wilmslow Astro
Re: dramatically improve the davis 7714 solar shield
« Reply #54 on: October 15, 2022, 04:10:41 PM »
My guess would be it depends on what is below the shield. If it is a surface that radiates any degree of heat you want it white, over say grass it may be better black. Proximity probably comes into too. The "safest" general option is probably white?
Mark

Offline ivano

  • Senior Contributor
  • ****
  • Posts: 280
    • http://www.supermeteo.com/stazione/ortelle/
Re: dramatically improve the davis 7714 solar shield
« Reply #55 on: October 15, 2022, 05:32:39 PM »
My guess would be it depends on what is below the shield. If it is a surface that radiates any degree of heat you want it white, over say grass it may be better black. Proximity probably comes into too. The "safest" general option is probably white?
ciao, la tua ipotesi ha fatto centro, proprio da questo che dipende la scelta effettuata nel colorare di nero l'ultimo piatto [tup]
1)3 gw1000 +1 GW2000
2)hp2551
3)ws80
4)ws68
5)2 wh32 EP
6)5 wh31 EP
7)2 meteoschield pro 3 gen
8)1 Fars meteoshield pro 3 gen
9) davis 7714 Black
10)wh40
11)schermo solare RAD-14 Metspec
12)schermo solare RAD-02 Metspec
13)Meteorain 200 compact (Barani)
14)davis ventilato h24
15) Davis vp2 pro ventilata
16) GW1001 ecowitt
17) Wittboy ecowitt
18)schermo solare  Comet system da Cometeo
template http://ortellemeteo.altervista.org/pwsd/
webcam :https://rtsp.me/embed/tRhazi3z/
http://www.supermeteo.com/stazione/ortelle/

Offline ivano

  • Senior Contributor
  • ****
  • Posts: 280
    • http://www.supermeteo.com/stazione/ortelle/
Re: dramatically improve the davis 7714 solar shield
« Reply #56 on: October 28, 2022, 01:00:13 PM »
The black davis 7714 is still being tested, it has now been two and a half months of testing, in all weather conditions it has proved its effectiveness
 [ You are not allowed to view attachments ]  [tup]
1)3 gw1000 +1 GW2000
2)hp2551
3)ws80
4)ws68
5)2 wh32 EP
6)5 wh31 EP
7)2 meteoschield pro 3 gen
8)1 Fars meteoshield pro 3 gen
9) davis 7714 Black
10)wh40
11)schermo solare RAD-14 Metspec
12)schermo solare RAD-02 Metspec
13)Meteorain 200 compact (Barani)
14)davis ventilato h24
15) Davis vp2 pro ventilata
16) GW1001 ecowitt
17) Wittboy ecowitt
18)schermo solare  Comet system da Cometeo
template http://ortellemeteo.altervista.org/pwsd/
webcam :https://rtsp.me/embed/tRhazi3z/
http://www.supermeteo.com/stazione/ortelle/

Offline ivano

  • Senior Contributor
  • ****
  • Posts: 280
    • http://www.supermeteo.com/stazione/ortelle/
Re: dramatically improve the davis 7714 solar shield
« Reply #57 on: December 23, 2022, 12:37:54 PM »
  [ You are not allowed to view attachments ]  Good evening everyone, this is the summary of the Davis 7714 test with the inside of the plates colored black, the test was carried out between the last week of August and the whole month of November, the screen which was taken as a reference for the test it is the third generation Meteoshield new pro by Barani,. [ You are not allowed to view attachments ]  the sensors used are the wh32/312 EP probe with sensirion SHT35, the sensors were aligned before the start of the test, in the post above you will find all the photos from the coloring of the dishes, and the comparison station, the test has ascertained that in this configuration the Davis 7714 has significantly improved in its performance, in all weather conditions, obviously these results are valid in my weather station, it would be interesting to have someone repeat the same test, anyone who wants to try I'll be happy to share my experience in all respects  [tup]
« Last Edit: December 23, 2022, 12:41:55 PM by ivano »
1)3 gw1000 +1 GW2000
2)hp2551
3)ws80
4)ws68
5)2 wh32 EP
6)5 wh31 EP
7)2 meteoschield pro 3 gen
8)1 Fars meteoshield pro 3 gen
9) davis 7714 Black
10)wh40
11)schermo solare RAD-14 Metspec
12)schermo solare RAD-02 Metspec
13)Meteorain 200 compact (Barani)
14)davis ventilato h24
15) Davis vp2 pro ventilata
16) GW1001 ecowitt
17) Wittboy ecowitt
18)schermo solare  Comet system da Cometeo
template http://ortellemeteo.altervista.org/pwsd/
webcam :https://rtsp.me/embed/tRhazi3z/
http://www.supermeteo.com/stazione/ortelle/

Offline vinceskahan

  • Senior Contributor
  • ****
  • Posts: 155
    • home site
Re: dramatically improve the davis 7714 solar shield
« Reply #58 on: December 23, 2022, 03:52:37 PM »
Some words mentioning your conclusions might be helpful.
WeeWX sites:
  Davis VP2+DFARS to a pi4
  EcoWitt GW1000, WH32 outdoor T+H, multiple WH31 indoor T+H, WH51 soilMoisture (docker)
  Davis AirLink (inside)
  PurpleAir (outside)
Home site:        https://www.skahan.net/
Wunderground: KWAFEDER15
PWS:                KWFEDER15
CWOP:              CW6881

Offline i know i have to

  • Member
  • *
  • Posts: 3
Re: dramatically improve the davis 7714 solar shield
« Reply #59 on: March 31, 2023, 07:07:04 AM »
I tried this yesterday painting all of the inside darkest matt black but i didn't get the wow-effect yet on the temperature, the temperatures still increases "too much" of what is expected when the sun comes out. For being the 2nd worlds best passive radiation shield there must be something else you can improve it with.

Offline G.Brown

  • Senior Member
  • **
  • Posts: 80
Re: dramatically improve the davis 7714 solar shield
« Reply #60 on: March 31, 2023, 07:38:21 AM »
 [ You are not allowed to view attachments ]  
you can see the bottom mounting bracket is white and I assume the bottom plate is also white - in contradiction to what has already been discussed?

Offline ivano

  • Senior Contributor
  • ****
  • Posts: 280
    • http://www.supermeteo.com/stazione/ortelle/
Re: dramatically improve the davis 7714 solar shield
« Reply #61 on: March 31, 2023, 07:57:39 AM »
hello, from what do you deduce that it still detects high temperature values? do you have it in comparison with? it is by no means the second best performing screen in the world, in normal conditions (white) it takes those 06/07 tenths from a meteoschield pro or a metspec, or a Comet, making it black inside, should reduce this distance, maybe if you have some photos of your work... to better understand
1)3 gw1000 +1 GW2000
2)hp2551
3)ws80
4)ws68
5)2 wh32 EP
6)5 wh31 EP
7)2 meteoschield pro 3 gen
8)1 Fars meteoshield pro 3 gen
9) davis 7714 Black
10)wh40
11)schermo solare RAD-14 Metspec
12)schermo solare RAD-02 Metspec
13)Meteorain 200 compact (Barani)
14)davis ventilato h24
15) Davis vp2 pro ventilata
16) GW1001 ecowitt
17) Wittboy ecowitt
18)schermo solare  Comet system da Cometeo
template http://ortellemeteo.altervista.org/pwsd/
webcam :https://rtsp.me/embed/tRhazi3z/
http://www.supermeteo.com/stazione/ortelle/

Offline i know i have to

  • Member
  • *
  • Posts: 3
Re: dramatically improve the davis 7714 solar shield
« Reply #62 on: March 31, 2023, 01:34:29 PM »
hello, from what do you deduce that it still detects high temperature values? do you have it in comparison with? it is by no means the second best performing screen in the world, in normal conditions (white) it takes those 06/07 tenths from a meteoschield pro or a metspec, or a Comet, making it black inside, should reduce this distance, maybe if you have some photos of your work... to better understand

Well the temperature increase always comes very shortly after the sun starts shining on the shield, especially notable when it's been cloudy for a long period before.As you can see on this picture the temperature increased from -0,4 to 1,8 within just a hour, 3 times faster than nearby stations including airport station.

For the whole march i have now compared my data to the airport and on average my stations reads -0,5c colder on cloudy days and 1,3c warmer on sunny days, i expect the reason for it to be colder on cloudy days comes from the compact structure of the davis 7714 which protects too much, while on sunny days the compactness makes it read higher values with too many inner parts warming up

There's nothing to question wether Davis 7714 is one of the best passive radiation shields out there, on this particular experiment it even had a t-max value 5c colder than a TFA radiation shield, even if that one is too cheap to almost count as a shield.

Offline JCA433

  • Senior Member
  • **
  • Posts: 81
Re: dramatically improve the davis 7714 solar shield
« Reply #63 on: March 31, 2023, 03:46:16 PM »
hello, from what do you deduce that it still detects high temperature values? do you have it in comparison with? it is by no means the second best performing screen in the world, in normal conditions (white) it takes those 06/07 tenths from a meteoschield pro or a metspec, or a Comet, making it black inside, should reduce this distance, maybe if you have some photos of your work... to better understand

Well the temperature increase always comes very shortly after the sun starts shining on the shield, especially notable when it's been cloudy for a long period before.As you can see on this picture the temperature increased from -0,4 to 1,8 within just a hour, 3 times faster than nearby stations including airport station.

For the whole march i have now compared my data to the airport and on average my stations reads -0,5c colder on cloudy days and 1,3c warmer on sunny days, i expect the reason for it to be colder on cloudy days comes from the compact structure of the davis 7714 which protects too much, while on sunny days the compactness makes it read higher values with too many inner parts warming up

There's nothing to question wether Davis 7714 is one of the best passive radiation shields out there, on this particular experiment it even had a t-max value 5c colder than a TFA radiation shield, even if that one is too cheap to almost count as a shield.




You may have a problem with reflected sunlight  inside the shield.   My location is near tropics with a high sun angle even this time of year so I rarely if ever have this problems with the Davis 7714 shield.

Offline ivano

  • Senior Contributor
  • ****
  • Posts: 280
    • http://www.supermeteo.com/stazione/ortelle/
Re: dramatically improve the davis 7714 solar shield
« Reply #64 on: April 01, 2023, 05:30:28 AM »
Hello everyone, if you have done the interior painting well and you have placed the sensor from below, you will have these performances, [ You are not allowed to view attachments ]   [ You are not allowed to view attachments ]  
and rest assured that this is the only way to test the performance of one screen against another, not with those nearby etc etc etc . ;)
1)3 gw1000 +1 GW2000
2)hp2551
3)ws80
4)ws68
5)2 wh32 EP
6)5 wh31 EP
7)2 meteoschield pro 3 gen
8)1 Fars meteoshield pro 3 gen
9) davis 7714 Black
10)wh40
11)schermo solare RAD-14 Metspec
12)schermo solare RAD-02 Metspec
13)Meteorain 200 compact (Barani)
14)davis ventilato h24
15) Davis vp2 pro ventilata
16) GW1001 ecowitt
17) Wittboy ecowitt
18)schermo solare  Comet system da Cometeo
template http://ortellemeteo.altervista.org/pwsd/
webcam :https://rtsp.me/embed/tRhazi3z/
http://www.supermeteo.com/stazione/ortelle/

Offline i know i have to

  • Member
  • *
  • Posts: 3
Re: dramatically improve the davis 7714 solar shield
« Reply #65 on: April 01, 2023, 02:42:41 PM »
Hello everyone, if you have done the interior painting well and you have placed the sensor from below, you will have these performances, [ You are not allowed to view attachments ]   [ You are not allowed to view attachments ]  
and rest assured that this is the only way to test the performance of one screen against another, not with those nearby etc etc etc . ;)

Why are you ignoring all of the text i just wrote to you, are you f**king retarded or something? Such a typical narcisstic move of you. I just f**king wasted 2 hours of my life painting the inside of the shield black because of your shitty advice without any results, i could have installed a solar driven fan inside of it instead.

Offline ivano

  • Senior Contributor
  • ****
  • Posts: 280
    • http://www.supermeteo.com/stazione/ortelle/
Re: dramatically improve the davis 7714 solar shield
« Reply #66 on: April 01, 2023, 03:15:42 PM »
Hello everyone, if you have done the interior painting well and you have placed the sensor from below, you will have these performances, [ You are not allowed to view attachments ]   [ You are not allowed to view attachments ]  
and rest assured that this is the only way to test the performance of one screen against another, not with those nearby etc etc etc . ;)

Why are you ignoring all of the text i just wrote to you, are you f**king retarded or something? Such a typical narcisstic move of you. I just f**king wasted 2 hours of my life painting the inside of the shield black because of your shitty advice without any results, i could have installed a solar driven fan inside of it instead.
Congratulations for your lexicon, really .... (reported anyway).. unfortunately I have seen your messages, I have seen the photo, a fraud of stations set up without any logic, just to put something on the post, one at the bottom, one north , one attached to the pole , one up , are you comparing davis performance against what ? with who? I saw that you have a ventilated vp2, put the davis 7714 black screen at the same height, the same SOUTH orientation, it is clear if the wind is absent or very weak, the vp2 pro wins easily, but in normal conditions with a little wind 10 km/h the black davis is superior, if you have photos of when you colored the davis black and the position of the sensor inside, let me see them.
1)3 gw1000 +1 GW2000
2)hp2551
3)ws80
4)ws68
5)2 wh32 EP
6)5 wh31 EP
7)2 meteoschield pro 3 gen
8)1 Fars meteoshield pro 3 gen
9) davis 7714 Black
10)wh40
11)schermo solare RAD-14 Metspec
12)schermo solare RAD-02 Metspec
13)Meteorain 200 compact (Barani)
14)davis ventilato h24
15) Davis vp2 pro ventilata
16) GW1001 ecowitt
17) Wittboy ecowitt
18)schermo solare  Comet system da Cometeo
template http://ortellemeteo.altervista.org/pwsd/
webcam :https://rtsp.me/embed/tRhazi3z/
http://www.supermeteo.com/stazione/ortelle/

Offline mauro63

  • Forecaster
  • *****
  • Posts: 388
Re: dramatically improve the davis 7714 solar shield
« Reply #67 on: April 01, 2023, 03:29:24 PM »
Hello everyone, if you have done the interior painting well and you have placed the sensor from below, you will have these performances, [ You are not allowed to view attachments ]   [ You are not allowed to view attachments ]  
and rest assured that this is the only way to test the performance of one screen against another, not with those nearby etc etc etc . ;)

Why are you ignoring all of the text i just wrote to you, are you f**king retarded or something? Such a typical narcisstic move of you. I just f**king wasted 2 hours of my life painting the inside of the shield black because of your shitty advice without any results, i could have installed a solar driven fan inside of it instead.

In our Italian forum, a message like yours would have immediately resulted in a definitive ban by the Staff, but evidently everything is allowed here, even calling a user mentally retarded.

My compliments, not so much to the user, obviously suffering from serious problems, but to the management of the forum

M.

Offline JCA433

  • Senior Member
  • **
  • Posts: 81
Re: dramatically improve the davis 7714 solar shield
« Reply #68 on: April 01, 2023, 03:42:34 PM »
My Davis 7714 performance with insides painted black are similar to IVANO.  I can confirm it works!

Offline saratogaWX

  • Administrator
  • Forecaster
  • *****
  • Posts: 9015
  • Saratoga, CA, USA Weather - free PHP scripts
    • Saratoga-Weather.org
Re: dramatically improve the davis 7714 solar shield
« Reply #69 on: April 01, 2023, 03:45:38 PM »

Why are you ignoring all of the text i just wrote to you, are you f**king retarded or something? Such a typical narcisstic move of you. I just f**king wasted 2 hours of my life painting the inside of the shield black because of your shitty advice without any results, i could have installed a solar driven fan inside of it instead.
Your reply is abusive.  Refrain from posting ad hominem attacks or you will be removed from the forum.

BTW: I try to leave examples of bad behavior up to demonstrate what NOT to post.  I generally try to give only one warning, and eject the person on the second instance.  Hopefully, there won't be a second instance by them.
« Last Edit: April 01, 2023, 06:46:28 PM by saratogaWX »
Ken True/Saratoga, CA, USA main site: saratoga-weather.org
Davis VP1+ FARS, Blitzortung RED, GRLevel3, WD, WL, VWS, Cumulus, Meteobridge
Free weather PHP scripts/website templates - update notifications on Twitter saratogaWXPHP

Offline Buick

  • Senior Member
  • **
  • Posts: 52
    • KWABELLI466
Re: dramatically improve the davis 7714 solar shield
« Reply #70 on: September 20, 2023, 09:01:45 PM »
I recently painted the undersides of all of the plates of my 7714 except the bottom one matte black and it appears that the modification was an improvement with regard to its previous performance compared to my 24hr FARS. I wont know with certainty to what degree, if any, there has been an improvement but my initial impression is positive which is really saying something because the 7714 always held its own against the FARS fairly well. I used low VOC, water-based spray paint and would recommend Montana Colors Polyurethane Water Based Matte Carbon Black https://www.montanacolors.com/en/productos/graffiti-water-based-300-aerosol-paint/, Pintyplus Evolution Acrylic Water Based Matte Jet Black https://www.pintyplus.com/usa/products/pintyplus-evolution-acrylic-water-based-spray-paint/ or Liquitex Acrylic Water Based Matte Carbon Black https://www.liquitex.com/us/product/liquitex-professional-spray-paint/?attribute_pa_ecommerce_size=12oz-400ml&attribute_pa_liquitex_colour_name=carbon-black.
VP2 (6163) w/ 7345.425 & 24hr FARS
6410 @ 26' AGL, 12' above rooftop
6415 @ 12' AGL
7714
Rainwise 111
Stratus
WiFiLogger2
WeatherLink Live

Offline G.Brown

  • Senior Member
  • **
  • Posts: 80
Re: dramatically improve the davis 7714 solar shield
« Reply #71 on: September 21, 2023, 05:16:22 AM »
I used some 30+ year old black board paint that was lying around - no problems.