AC voltage and calibration

[nickdd]

Hi,

Thanks for the info. I ran the procedure for all three phases and slightly adjusted the custom sensor code:
I have different sensitivity values for each sensor and that's why I ended up with this:

#define SENSITIVITY_L1 523.0f
#define SENSITIVITY_L2 513.0f
#define SENSITIVITY_L3 530.25f

    if(this->adcPin==34) {
      this->zmpt101b->setSensitivity(SENSITIVITY_L1);
    }
    if(this->adcPin==36){
      this->zmpt101b->setSensitivity(SENSITIVITY_L2);
    }
    if(this->adcPin==39){
      this->zmpt101b->setSensitivity(SENSITIVITY_L3);
    }


Voltages now kind of match my voltmeter's measurement.



Any tips for the calibration of the CT clamps?
I don't get the values I get from them as they are all over 1V  (see above).  As a result the number of amperes is therefore too high in my readings.

Regards,
Nick