Electrode Connection - Important; Electrode Function - Radiometer Analytical TitraLab 870 Reference Manual

TitraLab ®
Electrode
connection -
Important
Electrode
function
In order to simplify user operations when performing several types of
daily analyses, the instrument allows the connection of electrodes that
do not belong to the electrode system, provided that the electrodes
are compatible. In this way, the user will have a minimum of
operations to perform. It involves that all connected electrodes must
be immersed in the solution.
1st case
When you change from a method using a double platinum electrode
or a conductivity cell to a method using a pH electrode for example,
the instrument prompts you to check the double platinum electrode or
the conductivity cell connection then asks you to connect the pH
electrode. The instrument allows the presence of a double platinum
electrode or a conductivity cell even though this electrode is not used
in the operating system. However, the instrument switches to
differential measurement mode using the reference of the
pH electrode disconnected from the ground. This is because it is the
double platinum electrode or the conductivity cell that provides the
connection to the instrument ground. It involves that the double
platinum electrode or the conductivity cell must be immersed in the
solution.
2nd case
You edit a method using the differential mode (Cell grounding = Metal)
with, for example, a pH and a metal electrode. After several tests, you
decide to change the method programmation and clear the differential
mode (Cell grounding = Reference). In this case, the instrument does
not prompt you to disconnect the metal electrode and thus, continues
to use the differential measurement mode. It involves that the metal
electrode must be immersed in the solution.
If you no longer want to use the differential mode due to your work
schedule or the your installed electrodes, you just have to perform a
complete electrode uninstallation procedure
(select Install electrodes > Disconnect electrodes then
Connect electrodes). By doing this, the electrodes in the system will
only be installed.
Refer to "Disconnect electrodes", page
Refer to "Function", page
TitraLab 870 Reference Manual
97.
132.
Page 115