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Newbie question: All values are negative

Submitted by Guest on Sun, 01/02/2015 - 23:23

This is probably a very stupid question but I have installed the CT clips from a standard emonTX V3 and sending data using a Raspberry Pi running emonHub.  I have a 9V power adapter and the voltage appears to be coming through fine.

I have hooked up the CT clips as best I could but as it's an old house I have only limited access to the back of my meter box cabling.  I seem to be getting voltage readings through fine, but the only problem is that they are both (mains and solar) coming through as negative numbers.

Is there any way I can make them into positives for graphing?

Thanks

Chris

‹ New emoncms install (shared host) - data in inputs database table ok but not showing in input view page GLCD to show 3 cts ›
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Robert Wall's picture

Re: Newbie question: All values are negative

Submitted by Robert Wall on Sun, 01/02/2015 - 23:29.

Yes, turn the CTs around on their cables, or (if possible) reverse the phase of the AC adapter, or multiply by -1 in the feeds in emonCMS.
(The second time this has been asked in as many hours!)

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chris_in_aus's picture

Re: Newbie question: All values are negative

Submitted by chris_in_aus (not verified) on Mon, 02/02/2015 - 05:24.

Cool, thanks.  I missed the other post.

As it was almost impossible to get behind the board and get the CTs on, I've gone with the  x -1 option.  Worked perfectly.

Thanks for you help.

Chris

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