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MSP430F6731- error in power measurement for phase variation

Other Parts Discussed in Thread: MSP430F6731

Dear Sir/Madam

We have designed a Single Phase Multifunction Meter using device MSP430F6731. We have 3 ranges for Current measurement i.e. 20AAC, 5AAC, & 1A AC.

 

In 1A AC range we want to measure Wattage from 2 watts.

 

At present we can measure from 3 Watts, but we observed around 4%. Our customer is asking the error ±1.0% of Full Scale.

 

Kindly look into and guide to resolve the problem.

 

1 ) Schematic is attached for your reference.

2 ) Also the results is attached

3 ) Details as per catalogue enclosed

 

So that you can study & guide us further.

Regards 

Pradhan

PG09 SCHEMATIC.pdfPG09 Specification-ilovepdf-compressed (1).pdfPG-09_1Test Report.pdfPG-09_2Test Report.pdfPG-09_3Test Report .pdf

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