We don´t know this either.I'm not sure how this would connect to an Arduino because I don't know if analog- can be connected to Arduino GND.
Where does the negative voltage come from?I'm getting about 10V swing (-5V to +5V)
For sure one can measure AC using ADC of MCU.You can't measure AC using ADC of MCU.
I agree with this.The datasheet is very uninformative.
Makes no sense. 4-20 mA interface is always unipolar DC. What do you exactly mean with "voltage across"? A meaningful test would be to connect a shunt and measure the voltage between Analog- and 0V, also measure the resistance, the output might be even isolated.I check the voltage across 4-20mA output and It varies -22.34v to 22.34v.
But to measure the voltage across analog+ and analog- ... I don´t think this makes sense, since it is a current output.
The measurements suggest an internal connection between 0V and Qa-. It should be repeated with a 100 to 500 ohm load resistor at Q+/Qa-.
You didn't manage yet to show your circuit.
We use cookies and similar technologies for the following purposes:
Do you accept cookies and these technologies?
We use cookies and similar technologies for the following purposes:
Do you accept cookies and these technologies?