I'd like to measuring human skin conductance(so called GSR) using AD5933.
I designed circuits refer to EV B'd with AD5933 about ADI application note.
And measuring impedance using that circuit B'd ; It is sweeping Freq.
I think that is measuring body fat ; sweep freq means ananasys body fluid by body depth.
I want to just outside skin(like whrist) impedance.
So, Not need to sweep Freq, Just fixed freq.
And, what Freq. is measuring outside skin (like whrist) impedance?
2nd, I checked my skin resistor with Multimeter. that range about 50M~20Mohm.(Dry ~ Wet condition).
What value of Cal Resister(refer to ADI EV B'd Circuit)
Plz, Reply for my questions. ASAP.