Hi Sietse,
the procedure to determine Rpmin and Rpmax stays the same and is specified in the datasheet (http://www.ti.com/lit/ds/symlink/ldc1000.pdf) on pages 11 f. and in the LDC1000EVM Quickstart guide (http://www.ti.com/lit/ml/slyw022/slyw022.pdf) on pages 2 f.
Please note that you also need to adapt the filter capaitor CF which is also described in the deocuments mentioned above (page 13 in datasheet and page 3 in the EVM Quick Start guide).
Cheers,
Thomas