For inorganic granular mixes of high porosity (comprised of granite grit, turface, pumice, scoria, etc.), I am using 110/200 and 110/160 depending on the ratios. This is for growing a large number of succulent plants as well as containerized trees.
For my garden, I'm using different settings which I don't remember exactly the calibration. Sensor is packed for the winter, but I calibrated from fully saturated to quite dry/a bit past the drought stress point.
Overall, it's the trend of the data that's most useful to determine when to water.