Author Topic: Battery failures on Vantage Vue?  (Read 122755 times)

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Offline nov

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Re: Battery failures on Vantage Vue?
« Reply #375 on: September 21, 2017, 11:52:10 PM »
Thanks...form and function!
I just wish Davis designed the power supply a little better...3 sources of supply and it still fails. Luckily, with my "backyard" fix it works better than it ever did. Haven't seen the dreaded "low transmitter" message in over 2 years now.

The design is simple:

5W Solar panel---->12V regulator--->12V 1.2Ah battery--->Step down converter ("buck converter")--->3V regulated output---->direct connection to ISS CR123 terminals

Power supply is totally external now, and modular so individual components can be replaced; I haven't had to replace anything as yet.

Hope it helps!

Hi Durman can you help me to make an external power like your project?
I have a question. After the buck converter I have to use another hardware or I can connect the buck converter directly to the ISS Cr123 terminals?
Thanks :)

Yes after buck goes direct to cr123 terminals
if you need any more help just ask .

my setup parts below
12v battery  https://www.amazon.co.uk/gp/product/B000W1V628/ref=oh_aui_detailpage_o03_s01?ie=UTF8&psc=1
12v 5w solar panel  https://www.amazon.co.uk/gp/product/B00DS3DPOE/ref=oh_aui_detailpage_o04_s00?ie=UTF8&psc=1
12v solar charge controller  https://www.amazon.co.uk/gp/product/B01N41L0GC/ref=oh_aui_detailpage_o05_s00?ie=UTF8&psc=1
buck converter set to 3v output  https://www.amazon.co.uk/gp/product/B00UN1JXMM/ref=oh_aui_detailpage_o08_s00?ie=UTF8&psc=1
« Last Edit: September 22, 2017, 12:04:17 AM by nov »

Offline websign83

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Re: Battery failures on Vantage Vue?
« Reply #376 on: September 22, 2017, 10:08:10 AM »
Yes after buck goes direct to cr123 terminals
if you need any more help just ask .

my setup parts below
12v battery  https://www.amazon.co.uk/gp/product/B000W1V628/ref=oh_aui_detailpage_o03_s01?ie=UTF8&psc=1
12v 5w solar panel  https://www.amazon.co.uk/gp/product/B00DS3DPOE/ref=oh_aui_detailpage_o04_s00?ie=UTF8&psc=1
12v solar charge controller  https://www.amazon.co.uk/gp/product/B01N41L0GC/ref=oh_aui_detailpage_o05_s00?ie=UTF8&psc=1
buck converter set to 3v output  https://www.amazon.co.uk/gp/product/B00UN1JXMM/ref=oh_aui_detailpage_o08_s00?ie=UTF8&psc=1

Thank you nov for your explanation.
I want to buy this buck converter https://www.amazon.it/gp/product/B011HFSLGG/ref=ox_sc_act_title_2?smid=A50DZI580G3JX&psc=1 . This should be okay? is specific for 3v output...
Another question :) . I have to connect the buck converter on the load output (last two connections on the right side) of the charge regulator?

Thank you :-)

Regards from Sardinia

Bye bye :)

Offline nov

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Re: Battery failures on Vantage Vue?
« Reply #377 on: September 22, 2017, 04:55:50 PM »
Yes after buck goes direct to cr123 terminals
if you need any more help just ask .

my setup parts below
12v battery  https://www.amazon.co.uk/gp/product/B000W1V628/ref=oh_aui_detailpage_o03_s01?ie=UTF8&psc=1
12v 5w solar panel  https://www.amazon.co.uk/gp/product/B00DS3DPOE/ref=oh_aui_detailpage_o04_s00?ie=UTF8&psc=1
12v solar charge controller  https://www.amazon.co.uk/gp/product/B01N41L0GC/ref=oh_aui_detailpage_o05_s00?ie=UTF8&psc=1
buck converter set to 3v output  https://www.amazon.co.uk/gp/product/B00UN1JXMM/ref=oh_aui_detailpage_o08_s00?ie=UTF8&psc=1

Thank you nov for your explanation.
I want to buy this buck converter https://www.amazon.it/gp/product/B011HFSLGG/ref=ox_sc_act_title_2?smid=A50DZI580G3JX&psc=1 . This should be okay? is specific for 3v output...
Another question :) . I have to connect the buck converter on the load output (last two connections on the right side) of the charge regulator?

Thank you :-)

Regards from Sardinia

Bye bye :)

Hi websign83

Yes the buck looks like it should do your job for 3 volts output.
Try make sure the buck has no led lights or one at most . you need a low power consumption buck or the buck could drain your battery faster.
 
Buck input connects to solar charge controller load output. YES.
Buck output to davis cr123 terminals.
Battery to solar charge controller.
Solar Panel to solar charge controller.


some pictures of my setup although i do not use this buck with large led lights anymore as it was to power hungry i use the small buck with one tiny led  . I have snipped the leds on the charge controller to save power also.

   

« Last Edit: September 24, 2017, 09:47:58 AM by nov »

Offline maccross

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Re: Battery failures on Vantage Vue?
« Reply #378 on: September 28, 2017, 11:12:19 PM »

I think it can be helpful to share my experience with the "Low Battery Transmiter 1" error.
I bought a Vantage Vue weather station in 2011.
Since 2012 I noticed The Low Battery error showing sometimes mainly for no apparent reason, (some 2 or 3 times per month).
Almost all the times the error went off by its own and no data was lost during the nigths just after the error shows.
That can be checked in outside temperature/humidity graphs.
If data is lost for some hours during the night that seems to be a confirmation of real ISS low battery.

But this year begining in March I got the Low Battery warning and lost data during the nights.
Then I replaced the old battery with a new one (May 16).
But the error keept showing and data was lost during the nights with the new battery.
Even without the Low Battery error during the day my weather station was missing data for some hours during the nights.

Because of that I started thinking of replacing the battery, the transmitter, the supercap or the complete ISS.

Then as last DIY fix I decided to replace the battery with a specialy prepaired one.
At the positive battery terminal I soldered a small pointed golden pin so the contact with the positive battery hold terminal would
have a very small surface contact with a higher pressure and so a better contact quality would be achieved. ( the replaced battery
 was showing a slight oxidation at the positive terminal).
Besides that I used a very fine used sandpaper, isopropyl alcohol, and a cotton swab to clean the ISS battery holder contacts.

It has been more than two months now since that fix. The weather station has been running flawlessly since.

My conclusion is: the most fragile elements in the Vantage Vue weather station are the contacts between parts and or cables not soldered.
It seems dust, moisture, grease, polution or whatever gets in between the metalic parts and spoil the conductivity need for the proper circuit perfomance.

( I had a similar malfunction with Low Console Batteries warning: the console printed circuit golden tabs were green because of oxidation,
 the solution was wire soldering )

 

anything