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Hello,

I am trying to calibrate my current sensor and i am getting very different results

compared to a wall killawatt and a DMM.

Using some resistive loads all three meters are displaying allmost the same values (range 0.15A and 7A),

but when i measure my laptop the measurements go way off :

-killawatt and the multimeter 0.10A-0.15A

-my sensor 0.20-0.25A

where does this error come from? is there somethig wrong with the multimeter or the killawatt (like not having a true rms value) or is something wrong in my design.

I am also curios to know if anyone else has done some similar tests

Thx.