Hach-Lange TITRALAB Users Guide - Manual (Page 51)

Programming guidelines 51
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Only the Supervisor is allowed to program the menus, Electrode, Reagent,
and Method.
To select the Supervisor mode, press Stop for 3 seconds in the Main
window and enter the Supervisor code. Press 5 (Exit) and select
Return in mode = Supervisor.
✶ IMPORTANT ✶
For first time users, it is recommended to program the instrument as
follows:
1. Create the electrode(s) to be used to perform the measurements.
2. Create the reagent(s) to be used during the titration.
Then finally,
3. Create the method(s), which will consequently use the electrode(s)
and reagent(s) created in the first two steps of programming.
Once you have finished programming, make sure that NO question
marks "?" are displayed in the Reagent and Electrode tabs!