I am looking into making a 4 wire setup for impedance measurement over a membrane as shown below (left).
I was thinking I could use the BNC adapter and connect wavegen 1 and channels 1 and 2 as follows (right) and then use the WaveForms Impedance Analysis tool to do the measurements. However, after some experiments with the software, it seems that WaveForms bases its impedance calculations on what reference resistors you chose, which I don't have in my setup. Is there any way to get around this?
The four-electrode system is interesting because the measuring electrodes ch1+ and ch2+ do not carry any current as they are separated from the electrodes applying a voltage to the electrolyte solution. Hence there should be no buildup of material, electrolysis, or electrode polarization impedance at the measuring electrodes.
Question
rtorsvik
Hello!
I am looking into making a 4 wire setup for impedance measurement over a membrane as shown below (left).
I was thinking I could use the BNC adapter and connect wavegen 1 and channels 1 and 2 as follows (right) and then use the WaveForms Impedance Analysis tool to do the measurements. However, after some experiments with the software, it seems that WaveForms bases its impedance calculations on what reference resistors you chose, which I don't have in my setup. Is there any way to get around this?
The four-electrode system is interesting because the measuring electrodes ch1+ and ch2+ do not carry any current as they are separated from the electrodes applying a voltage to the electrolyte solution. Hence there should be no buildup of material, electrolysis, or electrode polarization impedance at the measuring electrodes.
Some similar topics were touched upon in this thread https://forum.digilent.com/topic/16915-ad2-as-a-electrochemical-impedance-meter-is-possible/
Best regards
rtorsvik
Link to comment
Share on other sites
4 answers to this question
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now