I'm trying to measure impedance of an RC transducer at different frequencies by performing a frequency sweep. Firstly I want to know, that is it possible to use an excitation signal of 650mV amplitude (sinusoid) i.e. with no attenuation mode? Also, the impedance results vary a lot by changing the amplitude of the excitation Signal. I want to sweep for the full range of ADUCM350 i.e. 80Hz to 79KHz. Also, after replacing the RCAL on the Switch MUX Config board, the results varies a lot, even if replaced with the same value resistor, why is it so? I've modified the Measurement 2 Wire example and is measuring impedance between AFE3 and AFE4.
Thanks and regards,