Hach-Lange TITRALAB 860_865 Reference Manual - Manual (Page 103)

Titra Lab ® TitraLab 860 and 865 Reference Manual
Page 103
Electrode
connection -
Important 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
to a method using a pH electrode for example, the instrument prompts
you to check the double platinum electrode connection then asks you
to connect the pH electrode. The instrument allows the presence of a
double platinum electrode 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 discon-
nected from the ground. This is because it is the double platinum
electrode that provides the connection to the instrument ground. It
involves that the double platinum electrode 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 88 .
Electrode
function Refer to "Function", page 120 .