Author Topic: Davis Vantage Pro2 - Super Capacitor Replacement - DIY  (Read 214 times)

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Offline nonnih

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Davis Vantage Pro2 - Super Capacitor Replacement - DIY
« on: March 02, 2018, 05:55:43 PM »
Hi all,

After 10 years of flawless service, my ISS stopped sending signal, and every time i replaced the battery it was exhausted within days.

As i am living in Iceland, we get not much sun from august to march and therefor i have had to replace the CR123 battery twice a year... until now maybe.

My super capacitor died and when i start working on replacing the capacitor i read on some articles that the standard capacitor is 2.7 v 10F, and it is possible to put an 50F capacitor, and more. As i have a European model, i can have 2 capacitors.  So i ordered 2x 2.7 50F capacitors and began to upgrade. It was an quite easy job, just a little bit soldering and my weather-station has working very nice after the upgrade.

I have here attached photos from my ISS, with the blown capacitor and the steps until it was ready.

Hope this will help out others in upgrading their ISS and fixing them.

Here is my ISS

After i remove the cover

Here is the blown Super Capacitor

Cleaning the hole for new capacitors, and opening new hole

New capacitors in place and ready for soldering

And this is how ISS with 2x 50F capacitors looks like.

Offline Bushman

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Re: Davis Vantage Pro2 - Super Capacitor Replacement - DIY
« Reply #1 on: March 02, 2018, 06:36:54 PM »
Great pictures!  thanks.  There was a thread about multiple supercaps before so I will be curious to know how yours works out.  And I notice you did not hot  glue them or anything?

Offline W3DRM

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Re: Davis Vantage Pro2 - Super Capacitor Replacement - DIY
« Reply #2 on: March 02, 2018, 10:57:38 PM »
Yes, great job! However, I hope you used some needle-nose pliers to hold the capacitor end of the wires so they were not stressed while bending the leads to fit the ISS board. Most capacitor failures occur from not stabilizing the leads on the capacitor end before bending them. Not doing this results in micro fractures at the capacitor end which will eventually fail. That is one of the reasons for securing the capacitor with hot glue or some other means of preventing the cap from moving around.
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