GX-3R Operator’s Manual Appendix B: Gas Select Mode • 111
1 . While in Gas Select Mode, press AIR to scroll to CHG LEL.
2 . Press and release POWER MODE. The current setting flashes.
3 . Use AIR to display the desired setting.
4 . Press and release POWER MODE to save the setting and return to the CHG LEL menu
item will be displayed.
5 . See “Exiting Gas Select Mode (START)” on page 111 to enter Measuring Mode.
Exiting Gas Select Mode (START)
1 . While in Gas Select Mode, press AIR to scroll to START.
2 . Press and release POWER MODE. The instrument begins its warm-up sequence.