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Re: Loss of temp sensors due lighting.
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Posted by Bob on Monday, 29 June 2009, at 10:20 p.m.,
in response to Re: Loss of temp sensors due lighting., posted by Bill
Thanks, Bill
I had you in mind when this happened. Both of your suggestion I had already in place.
The reason that the Inside and Outside Air Temp sensor was still functioning was because it home runs directly to the WEL. The T-Stat Monitor also connects directly to the WEL. All the other sensors passed through the T-Stat Monitor back to the WEL.
I have a 50' buried CAT5 cable out to my ground loop temp sensor.
I believe what happen is that the lightning strike created a huge magnetic field which inducted a high voltage through the 1-wire network. The 1-wire network was actually acting as a huge antenna.
The interesting thing is that the two sensors mounted inside the Marathon (plastic) DHW tank are still working.
I had originally bought 60 temperature sensors directly from Maxim-Dallas so I have spares on hand. Yesterday I edited the WEL configuration with the new device IDs.
I checked out the 1-wire weather guys for 1-wire surge protection...
h ttp://pond1.gladstonefamily.net:8080/surge-protection.html
h ttp://www.weather-watch.com/smf/index.php/topic,35351.0.html
h ttp://www.weather-above.com/Surge.html
Interested if this should help for the WEL 1-wire network?
Well down to the basement to roll a few this evening. ;>
Bob G.
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