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Latest Cumulus MX V3 release 3.28.6 (build 3283) - 21 March 2024
Cumulus MX V4 beta test release 4.0.0 (build 4018) - 28 March 2024
Legacy Cumulus 1 release v1.9.4 (build 1099) - 28 November 2014 (a patch is available for 1.9.4 build 1099 that extends the date range of drop-down menus to 2030)
Download the Software (Cumulus MX / Cumulus 1 and other related items) from the Wiki
Outside Relative Humidity on WH1080
Re: Outside Relative Humidity on WH1080
thanks. good idea.
sombedy who has got WH1081 (model without ferrite rod aerial) can write about values from humdity sensor...?
sombedy who has got WH1081 (model without ferrite rod aerial) can write about values from humdity sensor...?
- hans
- Posts: 171
- Joined: Sun 18 Jan 2009 9:27 pm
- Weather Station: wh1080 /ws4000(alecto)
- Operating System: Windows 10 64 bit
- Location: leiden,Netherlands
- Contact:
Re: Outside Relative Humidity on WH1080
i have done the mod with the ferriet antenna.(did have a good reception though)
at first i only wanted to drill some extra holes in the outside housing.(also on the top for better airflow).
for my RH didn,t got above 89%
i didn't wanted to drill in the pcb,which is very likely so i decided to open the unit.
this was also an opportunity to do the antenna mod.
mine was shuffed underneith the pcb in a weird angle,which could have influenced the humidity sensor,or even caused a shortcut,which is very possible when its damp.
now it gets to 98%,and cumulus is set to read 98 as 100%.
very simple double mod,only takes about 15 minutes and gave big improvement.
i do have to mention that over the original stevenson screen i placed a homebuild one with a ventilator in it.
that also made an improvement.
at first i only wanted to drill some extra holes in the outside housing.(also on the top for better airflow).
for my RH didn,t got above 89%
i didn't wanted to drill in the pcb,which is very likely so i decided to open the unit.
this was also an opportunity to do the antenna mod.
mine was shuffed underneith the pcb in a weird angle,which could have influenced the humidity sensor,or even caused a shortcut,which is very possible when its damp.
now it gets to 98%,and cumulus is set to read 98 as 100%.
very simple double mod,only takes about 15 minutes and gave big improvement.
i do have to mention that over the original stevenson screen i placed a homebuild one with a ventilator in it.
that also made an improvement.
Re: Outside Relative Humidity on WH1080
I've just made the mod with the antena. Now I'm testing...
- beteljuice
- Posts: 3292
- Joined: Tue 09 Dec 2008 1:37 pm
- Weather Station: None !
- Operating System: W10 - Threadripper 16core, etc
- Location: Dudley, West Midlands, UK
Re: Outside Relative Humidity on WH1080
Thanks for the feed-back Hans
......................Imagine, what you will KNOW tomorrow !
Re: Outside Relative Humidity on WH1080
after I've made this mod - I can NOT see any differences with humidity values...
-
- Posts: 38
- Joined: Mon 19 Jan 2009 7:31 pm
- Weather Station: PCE FWS20 (Fine Offset WH 1080)
- Location: San Martino Siccomario - Italy
Re: Outside Relative Humidity on WH1080
Mod on antenna done, now I'll see what happens
Ciao.
Stefano
Ciao.
Stefano
-
- Posts: 38
- Joined: Mon 19 Jan 2009 7:31 pm
- Weather Station: PCE FWS20 (Fine Offset WH 1080)
- Location: San Martino Siccomario - Italy
Re: Outside Relative Humidity on WH1080
At the moment the observations seem to be reliable, but the problem occurred predominantly with high values of humidity, currently low.
Regards.
Stefano
Regards.
Stefano
-
- Posts: 38
- Joined: Mon 19 Jan 2009 7:31 pm
- Weather Station: PCE FWS20 (Fine Offset WH 1080)
- Location: San Martino Siccomario - Italy
Re: Outside Relative Humidity on WH1080
No way for high values of humidity ; next step: additional potentiometer.
Bye.
Stefano
Bye.
Stefano
-
- Posts: 38
- Joined: Mon 19 Jan 2009 7:31 pm
- Weather Station: PCE FWS20 (Fine Offset WH 1080)
- Location: San Martino Siccomario - Italy
Re: Outside Relative Humidity on WH1080
My solution, on testing.
Bye
Bye
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Re: Outside Relative Humidity on WH1080
Is that a linear or a logarithmic potentiometer?
What is the approximate position of the wiper?
Mark
What is the approximate position of the wiper?
Mark
-
- Posts: 38
- Joined: Mon 19 Jan 2009 7:31 pm
- Weather Station: PCE FWS20 (Fine Offset WH 1080)
- Location: San Martino Siccomario - Italy
Re: Outside Relative Humidity on WH1080
Is a linear potentiometer, (with a 5.8 MOhm resistor the correction was too strong, so I've tried a greater resistance across the sensor pins).
With the ohmmeter, the resistance of the potentiomenter is about 8MOhm, so,the total resistance is about 14MOhm.
Now I'm testing.
Have a nice sunday.
Stefano
With the ohmmeter, the resistance of the potentiomenter is about 8MOhm, so,the total resistance is about 14MOhm.
Now I'm testing.
Have a nice sunday.
Stefano
Re: Outside Relative Humidity on WH1080
Can you take a photo and publish here? Thanks
-
- Posts: 38
- Joined: Mon 19 Jan 2009 7:31 pm
- Weather Station: PCE FWS20 (Fine Offset WH 1080)
- Location: San Martino Siccomario - Italy
Re: Outside Relative Humidity on WH1080
At the moment I haven't photos.
Care...my solder is too warm for that printed circuit, resulting in little damages (printed circuit damaged where the sensor is soldered). In the first stage I've soldered two thin wires over the printed circuit , the resistor with the potentiometer (flying) and the two wires from the pcb to the potentiometer and the resistor.
Enjoy
Care...my solder is too warm for that printed circuit, resulting in little damages (printed circuit damaged where the sensor is soldered). In the first stage I've soldered two thin wires over the printed circuit , the resistor with the potentiometer (flying) and the two wires from the pcb to the potentiometer and the resistor.
Enjoy
Re: Outside Relative Humidity on WH1080
thin solder
the thinner the better!
the thinner the better!