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Input sign Emoncms

Submitted by riverc1 on Mon, 21/07/2014 - 10:16

Hello, i need some help, i'm new in emoncms.

How could change the sign of an input?

Thanks

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TrystanLea's picture

Re: Input sign Emoncms

Submitted by TrystanLea on Mon, 21/07/2014 - 11:01.

Hello riverc1, you could use the scale input processor and multiply by -1. Is it one of your emontx power channels that are negative? if so could you flip the CT sensor?

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riverc1's picture

Re: Input sign Emoncms

Submitted by riverc1 on Wed, 23/07/2014 - 10:34.

Hello TrystanLea, thank you for your response.

yes, one of my emontx power is negative, i'm using scale input for multiply by -1, but the result is not correct and i don't know why

 

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pb66's picture

Re: Input sign Emoncms

Submitted by pb66 on Wed, 23/07/2014 - 11:34.

Can you expand on "not correct" ? 

That is the normal method and it usually works so some info on what values are you using and if there are any other processing steps or what version of emoncms you are using etc could help determine the issue.

Paul

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Robert Wall's picture

Re: Input sign Emoncms

Submitted by Robert Wall on Wed, 23/07/2014 - 12:15.

Also tell us what your wiring system is, what inputs your EmonTx is using and where your ac-ac voltage input and where your current transformers are placed.

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