DS203 h/w 2.82 calibration

pgcgroup

3 questions:
1. Can anyone outline the procedure to calibrate this unit? Should I ground channel A (join the clip and sensor) and then confirm 0 voltages in all slots or must I provide different voltages, within the ranges in the calibration table?
2. Is there a way to display the firmware and other system info? I can see it flashing past during startup, but is there a menu item where I can display them?
3. Currently, SYS 1.64, and APP (PLUS A1) 1.13, are they the most recent ones to use?
Thanks,
Ron