BOHDA
Junior Member level 1
lc meter pic16f876a
About FCL Buev has to be remark following diference from typical AADE work[as are presented by Buev]:
-AADE metod has an inconvenient regard to measuring big value of inductors[bigger than 10 mH] with an increasing value of self capacitance.In this case the reading values are diferent ,from the real one,about 2-10!
-For eliminate the above inconvenient the author use a new function-making the calibration with conected inductor.After this, the calculation is done showing the "real" value and the self capacitance.
-This method is also not ideal because the self capacitance is spread between the measured inductor and etalon inductor .If the measured inductor is 100 times bigger than etalon inductor[bigger than 10 mH;the etalon has 100 uH] the errors are smaller!
In Buev article you can see a representative photo for an inductor with an self capacitance of about 123.4pF[475.6 mH!!].You can imagine the errors for the classic AADE aparat!
The typical error in measuring inductance are 2 to 10 %,generally at lower value.For small inductors[as dimensions] with big value of resistance[more than 20 ohm] and closed magnetic field[without gaps],the errors show significant growings.
About the discussions in their forum-is normal to appear because is an complex SMD construction,not so easy to build!
About FCL Buev has to be remark following diference from typical AADE work[as are presented by Buev]:
-AADE metod has an inconvenient regard to measuring big value of inductors[bigger than 10 mH] with an increasing value of self capacitance.In this case the reading values are diferent ,from the real one,about 2-10!
-For eliminate the above inconvenient the author use a new function-making the calibration with conected inductor.After this, the calculation is done showing the "real" value and the self capacitance.
-This method is also not ideal because the self capacitance is spread between the measured inductor and etalon inductor .If the measured inductor is 100 times bigger than etalon inductor[bigger than 10 mH;the etalon has 100 uH] the errors are smaller!
In Buev article you can see a representative photo for an inductor with an self capacitance of about 123.4pF[475.6 mH!!].You can imagine the errors for the classic AADE aparat!
The typical error in measuring inductance are 2 to 10 %,generally at lower value.For small inductors[as dimensions] with big value of resistance[more than 20 ohm] and closed magnetic field[without gaps],the errors show significant growings.
About the discussions in their forum-is normal to appear because is an complex SMD construction,not so easy to build!