Using electrodes with ADuCM350 4 Wire BioZ board

A 2-wire measurement follows all of the same criteria as a 4-wire (non-isolated) measurement, except that the feedback nodes (P and N) are connected to D and T internally to the AFE instead of at the sensor. Therefore, 2-wire measurements are inclusive of access impedance, but give good relative accuracy. Also, the external in-amp is not required for a 2-wire isolated measurement. For a 2-wire measurement using the BioZ board, you should ensure that you remove the connection to the in-amp (LK9 and LK10)

For the results above, what exactly are you measuring? Is it the circuit shown; 470 ohm + (1 kohm || 10nF)? Is there any access impedance? Is there a current limiting resistor in series? Have you implemented this circuit on the BioZ daughter board or on another piece of hardware? Do the ideal results on the EKSP match the measured results?

A 2-wire measurement follows all of the same criteria as a 4-wire (non-isolated) measurement, except that the feedback nodes (P and N) are connected to D and T internally to the AFE instead of at the sensor. Therefore, 2-wire measurements are inclusive of access impedance, but give good relative accuracy. Also, the external in-amp is not required for a 2-wire isolated measurement. For a 2-wire measurement using the BioZ board, you should ensure that you remove the connection to the in-amp (LK9 and LK10)

For the results above, what exactly are you measuring? Is it the circuit shown; 470 ohm + (1 kohm || 10nF)? Is there any access impedance? Is there a current limiting resistor in series? Have you implemented this circuit on the BioZ daughter board or on another piece of hardware? Do the ideal results on the EKSP match the measured results?