I am aimed to use the calibration frequency pin of ADE7880

What formula should we use for 220v and 5A?"

I am aimed to use the calibration frequency pin of ADE7880

What formula should we use for 220v and 5A?"

Hi jet_chen,

Please refer document AN-1171 for detailed information on calibrating ADE7880.

http://www.analog.com/media/en/technical-documentation/application-notes/AN-1171.pdf

Hi jet_chen,

- The first step is to select Meter constant i.e. the number of impulses per kWHr. Then you calculate the expected CF as . Where Load is 220 * 5 for your case.
- Then you need to configure CF to match the expected CF by writing calculated value to CFxDEN using equation :

. Output FreqFullscale=34.409kHz. Voperating% and Ioperating% are the percentage of V & I with respect to full scale.

Once you set CFDEN, the expected CF for any load can be calculated using the first equation.

- You can then do phase and gain calibration as described in the respective sections in application note.

Hi jet_chen,

Please refer document AN-1171 for detailed information on calibrating ADE7880.

http://www.analog.com/media/en/technical-documentation/application-notes/AN-1171.pdf