I am using CN-0349 development board to measure EC. I have these setting
Rcal1 = 100ohms
Rcal2 = 1K ohms
Rfb = 100
Vp-p = 2v
Output external Freq = 2Khz
Frequency Increment = 0
Number of increment = 1
I have 2 questions that need help on.
1) My graph mS vs magnitude is inverted
Rcal = 1000ohms, real number=805, Imaginary number= 64978, magnitude = 64982
Rcal = 100ohms, real number=7762, Imaginary number= 60185, magnitude = 60185
Is this wrong?
2) If i would wish to measure high conductance, how can i measure below 100ohm. The circuit has a R2=100ohm in series with the unknown conductance. So if my unknown conductance is 0ohm, i would still measure 100ohm.
The table shown in CN-0349, shows the measure can be done at 10ohm. How can it be?