Other Parts Discussed in Thread: INA139
Hi,
I've two question, its connect eachother. Firstly; I'm tried to use ads1115 module to obtain of geophysical data from the ground. The data we want to measure is the ground voltage. Level of ground voltage is about to milivolts.Because of that we should have precision measurement. And our measurements with ads1115 is not stable. we cant measure the real values of ground voltages. Normally ads1115 is a very very stable to measure voltages which is milivolts but if you want to measure ground voltages,it doesnt work correctly. Why we can not measure ground voltages with ads1115 correctly?
And the second one is; While shunt resistors measurement, ads1115 differantial voltage measurement results not stable. If current over 100 mA, ads1115 raw data values is not stable and the all of measurement goes to false. what is the reason of that ?
And how wwe can fix the problems? Like using capacitors or resistors to connect ads1115 analog pins?
Thank you.