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Omnimeter 1 v.3 and the magic smoke

Posted: Mon May 10, 2021 12:52 pm
by ianf
Hi,

I made an off-by-one error wiring up L1 into #6 (CT3 connection) rather than #7 due to parallax . That side of the CT terminals is connected to #10 (N) so it blew up the trace R4 and R67 :oops: . Could you by any chance tell me the values of those 2 resistors so I can attempt a repair?

Ian

Re: Omnimeter 1 v.3 and the magic smoke

Posted: Wed May 26, 2021 11:58 am
by Jameson
Hi Ian,

Sorry to hear that. We would be happy to help you out. But we are a bit confused, maybe you have an older Omnimeter, but what you are describing does not match up with what we are seeing here. Do you mind providing photos of your Omnimeter PCB showing the entire PCB, showing a clear view of R4 and a clear view of R67? I think that will be the safest so we dont lead you down the wrong path.

Regards,

Re: Omnimeter 1 v.3 and the magic smoke

Posted: Sat May 29, 2021 7:33 am
by ianf
Thanks Jameson,

It looks like it took out the grounding part of the burden circuit. From what I can tell, terminals #2, #4 and #6 are connected together and then connected through R4 and R67 to Neutral. Technically I don't need L3, but it would be nice to have a fully functioning meter. Also, if you think I've damaged the current sensing circuit then I'm happy not to attempt the repair.

Image

Re: Omnimeter 1 v.3 and the magic smoke

Posted: Fri Jun 04, 2021 1:00 pm
by Jameson
Hello Ian,

Both the R4 and R67 resistors on your older Omnimeter model are 5.1 Ohm.

Sorry it took a while confirm this, but we had to go dig up some older Omnimeters to match the one you have there.

Good luck with the repair!!

Re: Omnimeter 1 v.3 and the magic smoke

Posted: Sat Jun 05, 2021 5:26 pm
by ianf
Thanks!