mohee
Newbie level 4
hello my friends
iam working now on data acquisition system to measure high dc current from another system which use shunt resistor(60mv max voltage drop) in series with measured current source and analog ammeter(display range0-50 A) in parallel with shunt resistor, so i use low pass filter (r=10k ,c=4.7µ) in parallel with ammeter to prevent ground loop when i connect the output terminal from filter to specific input channal of data acquisiton card, when i start measuring i face signal oscillation problem so please i need help to solve this probelm.
iam working now on data acquisition system to measure high dc current from another system which use shunt resistor(60mv max voltage drop) in series with measured current source and analog ammeter(display range0-50 A) in parallel with shunt resistor, so i use low pass filter (r=10k ,c=4.7µ) in parallel with ammeter to prevent ground loop when i connect the output terminal from filter to specific input channal of data acquisiton card, when i start measuring i face signal oscillation problem so please i need help to solve this probelm.