msp430fe427 do a electronic electricity meter

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du ZI YAN said:

live Taiwam measuring approximately 1.4A 110V

 Hi Du ZI, it is not possible to teach you in simple word how to calibrate an Energy meter without more knowledge of what are you doing:

 Are you using:

single phase

   or

triple phase AAron insertion circuits?

 1.4A 110V how you measured these parameters, how about load, phase angle and again from phase Cos phi?

 Three parameter exist on power so you need know all about load to integrate energy:

 Apparent Power: A = |V| * |I|  [VA] this is the product from RMS instrument measuring phase current and line voltage

 Active power P = |V| * |I| * Cos Phi  [W] this is the real working power doing active work

 Reactive power Q = |V| * |I| * Sin Phi [VAR] This is reflective power traveling back from load to line

 A = Sqrt(P^2 + Q^2)

-------------------------------

 Do you own a calibrated energy meter, a calibrated voltmeter, ammeter, watt meter and a reactive load box or bench with phase shifter and virtual load setup?

 Do you know about virtual load? or are you using a direct load?

  Start telling us about your understanding of my wrote and about your electric knowledge background, otherwise we have a very low chance to help you in calibrating an energy meter instrument. We can help a colleague but teaching is a job and none of us can spread a course for null profit.

 Regards

 Roberto

HELLO

I using

single phase

load is Resistance

Cos phi=0.99999

a direct load

i don't know what you write A = Sqrt(P^2 + Q^2)

THANKS