Figure 12 Keypad and front panel overview1 Instrument display 5 back key. Moves back one level in the menustructure.2 Cover for secure digital memory card slot 6 menu key. Moves to the Settings Menu from otherscreens and submenus.3 home key. Moves to the Main Measurement screenfrom other screens and submenus. On the graphicalmeasurement screen can be used to change thegraph settings.7 Directional keys. Used to navigate through themeasurement screens, menus, change settings,and increment or decrement digits.4 enter key. Accepts input values, updates, ordisplayed menu options. On the measurementscreen can be used to display diagnosticinformation.Inputs and outputs are set up and configured through the front panel using the keypad and displayscreen. This user interface is used to set up and configure inputs and outputs, create log informationand calculated values, and calibrate sensors. The SD interface can be used to save logs and updatesoftware.DisplayFigure 13 shows an example of the main measurement screen with a DO sensor connected to thecontroller.20 English