I just (~20:00 on Oct 11) typed the following to the nanobarometer:
*0100EW*0100PI=50*0100OI=0*0100P4<cr><control-j>
that set the data rate to ~10sps and the output format back to what we used in RS232 mode.
There are settings to set FIR mode, but I don't have this documentation here to tell me how to make sure that it is used.