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Problem measuring impedance of salt solutions

Question asked by Gagabi22 on May 23, 2017
Latest reply on May 24, 2017 by mcee

Hello, I'm trying to use the EVAL-AD5933EBZ to measure the impedance of KCl solutions at different concentration. I'm using normal wires as probes to put in the solutions. I always calibrate with a 1Mohm resistor and I do a Multi-point Frequency calibration. My sweep parameters are:

Start Frequency = 5000

Delta Frequency = 969

Number of Increments = 511

Number of Settling Time = 15

MCLK = 16000000

Range1:2vp-p

Gain(PGA) = X1

 

My problem is that I'm always getting the same curves regardless of the solution's concentration. What I'm trying to do is to get different curves in function of the solution's concentration but I don't know what to do to get them.

 

Thank you

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