Hach-Lange TITRALAB Users Guide - Manual (Page 67)

Running analyses 67
4. Running analyses 4. Running analyses 4. Running analyses 4. Running analyses 4. Running analyses
✶ IMPORTANT ✶
Before pressing the Run key, check the following points listed below:
1. Select the method by pressing 3 in the main window.
2. If Question marks "?" are present in the electrode and/or reagent
tabs. Programming error due to missing electrode/reagent
parameters. Contact your supervisor.
3. Connect/Check electrode(s). Refer to Short-Form Reminder no. 1.
When installing/checking an electrode system, do not forget to
connect all the installed electrodes to the Titration Manager or
ABU52 sockets and to install these electrodes on the Titration
Manager (Location = TIM) or a sample changer (Location = SAC).
It is important to immerse, in the same measuring beaker, all the
installed electrodes having the same location.
For example: conductivity and pH measurements.
If your installed electrode system comprises either a conductivity
cell or a double platinum electrode with a combined pH electrode, the
electrodes must remain permanently immersed in the same beaker,
in order to measure the pH correctly. This is because it is the
conductivity cell (or the double platinum electrode) that provides the
connection to the ground and not the reference electrode.
This so-called " 3-electrode or differential measurement configuration
" will stop the conductivity cell altering the measurement at the pH
electrode.
When using this configuration for an electrode calibration, the
conductivity cell and the pH electrode must always be immersed in
the same beaker.
Important: Never remove an electrode or an electrode system
without running the Installation/checking procedure first. The
instrument needs to know its configuration at any time.
For more information, refer to the Reference Manual of your titration
workstation, keyword index: "Electrode connection - Important".