As can be seen on the data sheet of DS2712EVKIT page 4 ( Impedance Test-Resistor R20) can only be set once the charging rate has been set.
Acceptable range of R20 values are:
min: 20kohm and max 250kohm.
Evaluation kit comes with default values of
DS2712 -> 33kohm
DS2711-> 68kohm
The values are set accordingly based on end application.