In looking at the PGA309 user guide, table 1.1, the Zero Offset adjustment capability is stated as +/-200%FS (coarse and fine combined). I assume FS means the full scale output of the sensor, in mV. However, it seems like the offset adjustment should be more. +/- 48mV coarse offset, and an additional fine offset adjust from the ZeroDAC of up to 4096mV/input-stage-gain (RTI). Is there a limitation I'm missing? Thanks for your help.