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ADE9078 电压有效值出问题

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on Sep 26, 2019

硬件采用电压互感器2ma:2ma  初级串2个100K电阻,次级300欧电阻,采集220V电压

电流有效值读取没问题

电压有效值出现两个问题:

1.在校准后再变化电压值会有误差,   大于一定值时真实值比读取值偏小,小于一定值时真实值比读取值大.  最高能到30多V的误差

2.断电后 电压值一直在增加持续几分钟后稳定,,,