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Re: ADE 7880 Accuracy Issue

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Hi hmani,

 

I would appreciate your help!

 

I tried to give all calibration information in the message above.

 

But step by step...

 

PhaseResolution 306E-6d, freq: 50

 

Inductive case:

UL1 = 110V, 60°

IL1 = 1A, 0°

 

afwatthr 14611d, afvarhr 25126d, Error 3113E-6d (Error with calculator: 0.178°)

bfwatthr 14616d, bfvarhr 25142d, Error 2985E-6d

cfwatthr 14630d, cfvarhr 25155d, Error 3177E-6d

Error is positive and 512d is added:

PHCALA 522d, PHCALB 522d,PHCALC 522d

Additional information:

* The Error calculation is a bit unaccurate due to a tan⁻1 approximation, but sign is correct!

* all other energy counter registers are 0

 

Capacitive case:

UL1 = 110V, -60°

IL1 = 1A, 0°

 

afwatthr 14472d, afvarhr 25240d, Error -2986E-6d (Error with calculator: -0.171°)

bfwatthr 14455d, bfvarhr 25204d, Error -2877E-6d

cfwatthr 14460d, cfvarhr 25223d, Error -3053E-6d

Error is negative, nothing is added:

PHCALA 10d, PHCALB 9d,PHCALC 10d

* The Error calculation is a bit unaccurate due to a tan⁻1 approximation, but sign is correct!

* all other energy counter registers are 0

 

It seems, that only the sign of the Error is wrong...

 

I will try to do some energy measurements later on.

 

Thanks!

Heimo


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