Keypad
1. ESC used to switch the instrument on and to place into standby mode (only if power supply lead remains connected to the instrument). Also used to escape/exit a mode.
2. CAL / CLR used to select and perform a calibration sequence. This key is also used to clear readings from Memory. Used to select Abs/Rel mV in mV mode.
3. Print key used to initiate a print.
4. Up Arrow used for adjustment during set up, to scroll results and to toggle between mV and pH modes.
5. Down Arrow used for adjustment during set up, to scroll results and to toggle between mV and pH modes.
6. Left Arrow used for adjustment during set up and to move between mode tags.
7. Right Arrow used for adjustment during set up and to move between mode tags.
8. STO used to accept an entered value in set-up mode and to instigate a stored reading. This key can also be used as a CAL key during calibration.