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CTs 2-4 all return a signal of 0

Submitted by natshiel on Fri, 11/07/2014 - 23:40

Hi y'all,

Sorry if this is answered elsewhere, but I couldn't find it on the forums. My EmonTx3 and EmonBase for Pi arrived today, and I'm trying to get them set up. I've got the device posting data to my emonmcs account, but I have a problem. Only CT1 is returning an actual value from the current clips that I purchased.

I've tried all 4 clips in different CTs, but I only get a reading when any clip is plugged into the CT1 socket.

I'm in the US, and using the AC power supply. Everything but the readings from CT2-4 is working.

Thanks in advance!

‹ EmonTX, CT3 issue USB cable emonTX V3 ›
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Robert Wall's picture

Re: CTs 2-4 all return a signal of 0

Submitted by Robert Wall on Sat, 12/07/2014 - 10:42.

Did you reset/restart the emonTx when you transferred your CT to the other inputs? The software detects the inputs in use only at startup, thereafter unused inputs are locked out.

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natshiel's picture

Re: CTs 2-4 all return a signal of 0

Submitted by natshiel on Mon, 14/07/2014 - 00:36.

Worked like a charm! Thanks so much.

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Robert Wall's picture

Re: CTs 2-4 all return a signal of 0

Submitted by Robert Wall on Mon, 14/07/2014 - 10:26.

I've added a note in the Wiki:

[Note: Detection of the inputs in use takes place at power-on. The sketch must be re-started (press the reset button) if any change is made to the input connections.]

Thanks for drawing our attention to that point.

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